Cabletron Systems Switch TSX 1620 User Manual

®
Portable Management Application  
for the  
TSX-1620  
User’s Guide  
The Comp le te Ne tworking Solution  
 
Notice  
Cabletron Systems reserves the right to make changes in specifications and other information  
contained in this document without prior notice. The reader should in all cases consult Cabletron  
Systems to determine whether any such changes have been made.  
The hardware, firmware, or software described in this manual is subject to change without notice.  
IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDIRECT,  
SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED  
TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION  
CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF, KNOWN, OR  
SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAGES.  
Virus Disclaimer  
Cabletron has tested its software with current virus checking technologies. However, because no anti-  
virus system is 100% reliable, we strongly caution you to write protect and then verify that the  
Licensed Software, prior to installing it, is virus-free with an anti-virus system in which you have  
confidence.  
Cabletron Systems makes no representations or warranties to the effect that the Licensed Software is  
virus-free.  
Copyright © 1996 by Cabletron Systems, Inc. All rights reserved.  
Printed in the United States of America.  
Order Number: 9031978-E1 October 1996  
Cabletron Systems, Inc.  
35 Industrial Way, P.O. Box 5005  
Rochester, NH 03867-0505  
SPECTRUM, MiniMMAC, FNB, Multi Media Access Center, and DNI are registered trademarks,  
and Portable Management Application, IRM, IRM2, IRM3, IRBM, ETSMIM, EFDMIM, EMME,  
ETWMIM, FDMMIM, FDCMIM, MRXI, MRXI-24, NB20E, NB25E, NB30, NB35E, SEHI, TRBMIM,  
TRMM, TRMMIM, TRXI, Media Interface Module, MIM, and Flexible Network Bus are  
trademarks of Cabletron Systems, Inc.  
UNIX and OPENLOOK is a trademark of Unix System Laboratories, Inc. OSF/Motif and Motif are  
trademarks of the Open Software Foundation, Inc. X Window System is a trademark of Massachusetts  
Institute of Technology. Ethernet and XNS are trademarks of Xerox Corporation. Apple and  
AppleTalk are registered trademarks of Apple Computer, Inc. Banyan is a registered trademark of  
Banyan Systems, Inc. DECnet is a registered trademark of Digital Equipment Corporation. Novell is a  
registered trademark of Novell, Inc. CompuServe is a registered trademark of CompuServe. Sun  
Microsystems is a registered trademark, and Sun, SunNet, and OpenWindows are trademarks of Sun  
Microsystems, Inc.  
i
 
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Cabletron Systems, Inc., 35 Industrial Way, Rochester, New Hampshire 03867-0505.  
2. (a) This computer software is submitted with restricted rights. It may not be used, reproduced, or disclosed  
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ii  
 
Contents  
Chapter 1  
Chapter 2  
Introduction to SPMA for the TSX-1620  
Using the TSX-1620 User’s Guide .............................................................................. 1-1  
What’s NOT in the TSX-1620 User’s Guide. . ................................................... 1-2  
Conventions................................................................................................................... 1-3  
Screen Displays ...................................................................................................... 1-3  
Using the Mouse .................................................................................................... 1-5  
Getting Help .................................................................................................................. 1-6  
TSX-1620 Firmware....................................................................................................... 1-7  
Using the TSX-1620 Hub View  
Using the Hub View ..................................................................................................... 2-1  
Navigating Through the Hub View .................................................................... 2-2  
Hub View Front Panel........................................................................................... 2-3  
Using the Mouse in the TSX-1620 Hub View..................................................... 2-5  
The TSX-1620 Application Displays.................................................................... 2-6  
The Interface Application Display ............................................................... 2-7  
The Bridge Application Display................................................................... 2-8  
Monitoring Device Performance................................................................................. 2-9  
Port Display Form.................................................................................................. 2-9  
Interface Port Display Form Options........................................................... 2-9  
Port Color Codes for the Interface Application Display......................... 2-12  
Bridge Port Display Form Options ............................................................ 2-13  
Port Color Codes for the Bridge Application Display............................. 2-14  
Clearing Statistical Information......................................................................... 2-14  
Managing the Device.................................................................................................. 2-15  
Setting the Polling Intervals ............................................................................... 2-15  
Using the Bridge Config Utility......................................................................... 2-17  
Defining Community Names............................................................................. 2-18  
Configuring Your TSX-1620’s Serial Port ......................................................... 2-19  
Performing IF Configuration.............................................................................. 2-21  
Changing the Displayed Interface.............................................................. 2-22  
Performing Interface Configuration .......................................................... 2-22  
Viewing NetBios Information ............................................................................ 2-23  
Viewing and Changing System Information ................................................... 2-24  
Setting the Device Date, Time, and Daylight Savings Mode.................. 2-25  
Configuring Port Security................................................................................... 2-25  
Viewing Your Port Security Settings.......................................................... 2-26  
Configuring Your Port Security Settings................................................... 2-28  
Viewing the Interface List................................................................................... 2-29  
iii  
 
Contents  
Accessing the MIB I, II Tool................................................................................2-30  
Accessing Bridge Management..........................................................................2-30  
Performing Source Routing Configuration for a Port.....................................2-30  
Viewing a Bridge Port’s Source Address List ..................................................2-31  
Enabling/Disabling Bridging for TSX-1620 Ports...........................................2-32  
Enabling and Disabling Bridge Ports.........................................................2-32  
Chapter 3  
Using the TSX-1620 Bridge View  
Bridging Basics ..............................................................................................................3-1  
Transparent Bridging.............................................................................................3-2  
Source Route Bridging...........................................................................................3-2  
Source Route Transparent Bridges.......................................................................3-3  
Accessing the Bridge Traffic View Window ..............................................................3-3  
Navigating Through the Bridge Traffic View.....................................................3-4  
Bridge Traffic View Front Panel ...........................................................................3-6  
The Bridge Port Display........................................................................................3-7  
Choosing Bridge Traffic Information: Bridge Traffic View Buttons................3-8  
Using the Detail View Window................................................................................. 3-11  
The Bridge Status Window ........................................................................................3-12  
The Bridge Statistics Window....................................................................................3-13  
The Filtering Database Window ...............................................................................3-15  
Viewing the Filtering Database..........................................................................3-16  
Changing the Filtering Database Dynamic Ageing Time ..............................3-19  
Changing Forwarding and Static Database Entries........................................3-20  
Deleting a Static Table Entry .......................................................................3-22  
Finding a Filtering Database MAC Address....................................................3-22  
The Spanning Tree Protocol Window.......................................................................3-22  
Changing Spanning Tree Parameters................................................................3-27  
The Spanning Tree Port Parameters Window.........................................................3-27  
Changing a Port’s STA Parameters....................................................................3-29  
The Source Routing Configuration Window...........................................................3-29  
Changing Source Routing Port Parameters .....................................................3-32  
Creating Bridge Traffic Charts, Graphs and Meters...............................................3-33  
Configuring Forwarding Thresholds .......................................................................3-34  
Viewing the Forwarding Log.....................................................................................3-37  
Changing Polling Intervals........................................................................................3-39  
Enabling and Disabling Ports....................................................................................3-40  
Enabling and Disabling a Transparent Bridge Port ........................................3-40  
Enabling and Disabling a Source Routing Bridge Port ..................................3-41  
Enabling and Disabling Both Transparent and Source Routing  
on a Bridge Port.............................................................................................3-42  
iv  
 
Chapter 1  
Introduction to SPMA  
for the TSX-1620  
How to use the TSX-1620 User’s Guide; manual conventions; contacting Cabletron Technical Support;  
TSX-1620 firmware versions supported by SPMA  
The TSX-1620 is a high-speed stand-alone Token Ring switch with the ability to  
transparently switch packets among its various attached ring networks at full line  
rate (4 or 16 Mbps) and with minimal latency. The TSX-1620 provides source  
routing functions while using store and forward switching technology. The TSX-  
1620 also provides virtual networking capability, allowing you to configure  
logical rings that include multiple physical rings attached to the front panel ports  
(e.g., physical rings inserted in ports 1, 2, 5, and 8 could all be assigned to a single  
virtual ring network, and would communicate as if they actually were on the  
same physical ring). Using this capability, 4 and 16 Mbps devices can be placed on  
separate physical rings (each port automatically determines the speed of the ring  
to which it is connected), allowing the 16 Mbps devices to operate at full speed,  
and the switch can treat both rings as a single logical ring network. Broadcast  
discovery packets can be confined to a virtual subset of the attached rings, thereby  
reducing overall traffic on the switch.  
The TSX-1620 is an 8 port switch which is expandable to 16 ports, with STP/UTP  
and 4 or 16 Mbps on each port via front panel RJ-45 connectors. The device is  
IEEE 802.5 compliant with support for IEEE 802.1d spanning tree, and supports  
SNMP, including MIB II.  
Using the TSX-1620 User’s Guide  
Your SPECTRUM Portable Management Application (SPMA) for the TSX-1620  
consists of a number of different applications, each of which provides a portion of  
the overall management functionality. Each of these applications can be accessed  
from the icon menu (if you are using a management platform) and from the  
Stand-alone Launcher or the command line (if you are running in stand-alone  
1-1  
 
Introduction to SPMA for the TSX-1620  
mode); in addition, several applications can also be accessed from within the Hub  
View, a graphical display of the TSX-1620 and its ports.  
The TSX-1620 User’s Guide describes how to use many of the applications  
included with the module; note that the instructions provided in this guide apply  
to the TSX-1620 module regardless of the operating system or management  
platform you are using. Instructions for launching each individual function from  
the command line (stand-alone mode) are also included in each chapter.  
Following is a description of the applications documented in this guide; while we  
provide as much background information as we can, we do assume that you’re  
familiar with Ethernet networks and general bridging and network management  
concepts:  
Chapter 1, Introduction to SPMA for the TSX-1620, describes the TSX-1620  
User’s Guide and the conventions used in this and other SPMA manuals,  
explains where to find information about the TSX-1620, and tells you how to  
contact Cabletron Systems Technical Support.  
Chapter 2, Using the TSX-1620 Hub View, describes the visual display of the  
Hub and explains how to use the mouse within the Hub View; the operation  
of some basic functions (changing the Hub View display, opening menus and  
windows, enabling and disabling ports, checking device status, and so on)  
available only from within the Hub View is also described. You can access the  
Hub View application from the icon menu or the command line.  
Chapter 3, Using the TSX-1620 Bridge View, provides detailed instructions  
for configuring and managing the TSX-1620’s powerful bridging capabilities,  
including monitoring bridge operation, using the filtering database, and  
setting forwarding thresholds and notification options. You can access the  
Bridge View from the Hub View, the icon menu or the command line.  
What’s NOT in the TSX-1620 User’s Guide. . .  
The following standard SPMA tools are available through the TSX-1620 module  
and are explained in the SPECTRUM Portable Management Application Tools  
Guide:  
MIB I, II  
MIBTree  
The MIB I, II application is available from the Hub View, the platform console  
window Tools menu, the Stand-alone Launcher window, or the command line.  
The MIBTree application is available from the platform console window Tools  
menu, the Stand-alone Launcher window, or the command line.  
Instructions on discovering Cabletron devices, creating icons, and accessing the  
icon menus within your management platform are included in your Installing  
and Using SPECTRUM for... guide. If you are using SPMA for the TSX-1620 in  
stand-alone mode — that is, without benefit of a specific network management  
1-2  
Using the TSX-1620 User’s Guide  
 
Introduction to SPMA for the TSX-1620  
system — instructions for starting each application from the command line are  
included in each chapter, both in this guide and in the SPMA Tools Guide.  
Conventions  
SPECTRUM Portable Management Applications — including the TSX-1620  
module — can work with a number of different network management systems  
running on several different operating systems and graphical user interfaces. This  
versatility presents two documentation problems: first, there is no standard  
terminology; and second, the appearance of the windows will differ based on the  
graphical interface in use. For the sake of consistency, the following conventions  
will be followed throughout this and other SPMA guides.  
Screen Displays  
SPMA runs under a variety of different operating systems and graphical user  
interfaces. To maintain a consistent presentation, screen displays in this and other  
SPMA guides show an OSF/Motif (X Windows) environment. If you’re used to a  
different GUI, don’t worry; the differences are minor. Buttons, boxes, borders, and  
menus displayed on your screen may look a bit different from what you see in the  
guide, but they’re organized and labelled the same, located in the same places,  
and perform the same functions in all screen environments.  
Some windows within SPMA applications can be re-sized; those windows will  
display the standard window resizing handles employed by your windowing  
system. Re-sizing a window doesn’t re-size the information in the window; it just  
changes the amount of information that can be displayed (see Figure 1-1). When  
you shrink a window, scroll bars will appear as necessary so that you can scroll to  
view all the information that is available.  
Conventions  
1-3  
 
Introduction to SPMA for the TSX-1620  
Use the scroll bars  
provided to choose  
what to display in a  
window that’s been  
resized  
Click here to  
display footer  
message history  
Figure 1-1. Window Conventions  
Some windows will also contain a button; selecting this button  
launches a History window (Figure 1-2) which lists all footer messages that have  
been displayed since the window was first invoked. This window can help you  
keep track of management actions you have taken since launching a management  
application.  
1-4  
Conventions  
 
 
Introduction to SPMA for the TSX-1620  
Figure 1-2. The History Window  
Using the Mouse  
The UNIX mouse has three buttons. Procedures within the SPMA document set  
refer to these buttons as follows:  
Button 1  
Button 2  
Button 3  
Figure 1-3. Mouse Buttons  
If you’re using a two-button mouse, don’t worry. SPMA doesn’t make use of  
mouse button 2. Just click the left button for button 1 and the right mouse button  
when instructed to use mouse button 3.  
Conventions  
1-5  
 
 
Introduction to SPMA for the TSX-1620  
Whenever possible, we will instruct you on which mouse button to employ;  
however, menu buttons within SPMA applications will operate according to the  
convention employed by the active windowing system. By convention, menu  
buttons under the Motif windowing environment are activated by clicking the left  
mouse button (referred to as mouse button 1 in SPMA documentation), and there  
is no response to clicking the right button (mouse button 3). Under  
OpenWindows, menu buttons can be activated by clicking the right button, and  
convention dictates that the left button activates a default menu option; within  
SPMA, that default option will also display the entire menu. Because of this  
difference, references to activating a menu button will not include instructions  
about which mouse button to use. All other panels from which menus can be  
accessed, and all buttons which do not provide access to menus, will operate  
according to SPMA convention, as documented.  
Getting Help  
If you need additional support related to SPMA, or if you have any questions,  
comments, or suggestions related to this manual, contact Cabletron Systems  
Technical Support. Before calling, please have the following information ready:  
The product name and part number  
The version number of the program that you need help with. SPMA is  
modular, which means each application will have a specific revision number.  
Where applicable, an INFO button provides the version number; you can also  
view the version number for any application by typing the command to start  
the application followed by a -v.  
You can contact Cabletron Systems Technical Support by any of the following  
methods:  
By phone:  
Monday through Friday between 8 AM and 8 PM  
Eastern Standard Time at (603) 332-9400.  
By mail:  
Cabletron Systems, Inc.  
PO Box 5005  
Rochester, NH 03866-5005  
®
By CompuServe :  
By Internet mail:  
FTP  
GO CTRON from any ! prompt  
ctron.com (134.141.197.25)  
anonymous  
Login  
Password  
your email address  
(603) 335-3358  
By BBS:  
Modem Setting  
8N1: 8 data bits, 1 stop bit, No parity  
1-6  
Getting Help  
 
Introduction to SPMA for the TSX-1620  
For additional information about Cabletron Systems products, visit our World  
TSX-1620 Firmware  
SPMA for the TSX-1620 has been tested against firmware versions 1.3.6 and 1.4.5;  
if you have an earlier version of firmware and experience problems running  
SPMA contact Cabletron Systems Technical Support for upgrade information.  
TSX-1620 Firmware  
1-7  
 
Introduction to SPMA for the TSX-1620  
1-8  
TSX-1620 Firmware  
 
Chapter 2  
Using the TSX-1620 Hub View  
Navigating through the Hub View, monitoring hub performance; managing the hub  
The heart of the SPECTRUM Portable Management Application (SPMA) for the  
TSX-1620 is the Hub View, a graphical interface that gives you access to many of  
the functions that provide control over the TSX-1620.  
Using the Hub View  
There are two ways to open the Hub View: if you are working within a network  
management system, you can select the Hub View option from the icon menu;  
specific directions for creating a TSX-1620 icon and accessing the icon menu can  
be found in the appropriate Installing and Using SPECTRUM for... guide. If you  
are running the TSX-1620 module in a stand-alone mode, type the following at the  
command line:  
spmarun tsxmod <IP address> <community name>  
The community name you use to start the module must have at least Read access;  
for full management functionality, you should use a community name that  
provides Read/Write or Superuser access. For more information on community  
names, consult the appropriate Installing and Using SPECTRUM for... guide,  
and/or the Community Names chapter in the SPMA Tools Guide.  
2-1  
 
Using the TSX-1620 Hub View  
The spmarun script invoked first in the above command temporarily sets the environment  
NOTES  
variables SPMA needs to operate; be sure to use this command any time you launch an  
application from the command line. This script is automatically invoked when you launch  
an application from the icon menu or from within the Hub View.  
If you wish to configure your TSX-1620 in any way, be sure to use a community name  
with at least Read/Write access. If you only wish to view current settings, a community  
name with Read access will be sufficient.  
If there is a hostname mapped to your TSX-1620’s IP address, you can use <hostname> in  
place of <IP address> to launch this application. Please note, however, that the hostname  
is not the same as the device name which can be assigned via Local Management and/or  
SPMA; you cannot use the device name in place of the IP address.  
Navigating Through the Hub View  
Within the Hub View, you can click mouse buttons in different areas of the  
window to access various menus and initiate certain management tasks. The  
following diagrams describe the information displayed in the Hub View and  
show you how to use the mouse to display the TSX-1620’s menus.  
2-2  
Using the Hub View  
 
Using the TSX-1620 Hub View  
Front Panel  
Device summary  
information  
Figure 2-1. TSX-1620 Hub View  
Hub View Front Panel  
In addition to the graphical display of the TSX-1620’s ports, the Hub View gives  
you device level summary information. The following Front Panel information  
appears to the right of the port display in the Hub View:  
Contact Status is a color code that shows the status of the connection between  
SPMA and the device:  
Green indicates a valid connection.  
Blue means that SPMAis trying to reach the device but doesn’t yet know if the  
connection will be successful.  
Red means that SPMA is unable to contact or has lost contact with the device.  
Using the Hub View  
2-3  
 
Using the TSX-1620 Hub View  
Uptime  
The time that the device has been running without interruption. The counter  
resets to 0 days 00:00:00 (days:HH:MM:SS) when one of the following occurs:  
Power to the device is cycled.  
The device is reset manually.  
Device Name  
This field displays the device’s MIB II ifName value. You can set this value using  
the SNMP MIB2 System Group window, available from the Interface menu.  
Consult your SPMA Tools Guide for detailed information about the System  
Group window and its use.  
Device Location  
This field displays the device’s MIB II ifLocation value. You can set this value  
using the SNMP MIB2 System Group window, available from the Interface menu.  
Consult your SPMA Tools Guide for detailed information about the System  
Group window and its use.  
IP Address  
The device’s Internet Protocol address; this field will display the IP address you  
have used to create the TSX-1620 icon (if you are running the Hub View from a  
management platform) or the IP address you used to launch the Hub View  
program (if you are running in stand-alone mode). You cannot change the TSX-  
1620’s IP address from SPMA.  
Clicking the Device button displays the Device menu, Figure 2-2, which lets you  
open the Polling Intervals window.  
Figure 2-2. TSX-1620 Hub View Device Menu  
See Setting the Polling Intervals on page 2-15 for details about the Polling  
Intervals window.  
Note that the Device menu does not provide access to every application which is  
available to the TSX-1620; some information is only available from the Module,  
Interface, Bridge, and/or Bridge Port menus, and several applications can only be  
accessed either from the icon menu (if you are running under a network  
management platform) or from the command line (if you are running in stand-  
alone mode). See Chapter 1, Introduction to SPMA for the TSX-1620, for a  
complete list of applications available to the TSX-1620 and how to access each  
one.  
2-4  
Using the Hub View  
 
 
Using the TSX-1620 Hub View  
Clicking mouse button 1 on the Quit button closes all Hub View application  
windows; any open applications which can also be accessed from the command  
line or from the icon menu will remain open.  
Using the Mouse in the TSX-1620 Hub View  
Each of the TSX-1620’s ports will be displayed in the hub view; use the mouse as  
indicated in the illustration in the following diagram (Figure 2-3) to access  
Module, Interface/Bridge, and Bridge Port menus and functions.  
Module Index  
Module Type  
Click button 3 to display the Module  
menu.  
Click button 3 to display the Module  
menu.  
Port Status  
Port Display Form  
The Port Status display changes with  
the type of port display format  
selected. Statistical selections display  
values in a statistic/ second format.  
Load displays traffic as a percentage  
of theoretical maximum capacity. Click  
button 3 to display the Bridge Port  
menu when you are viewing the  
Bridge application display mode. See  
on page 2-6, for details on the  
application display modes.  
Click button 3 to display either the  
Interface or Bridge menu, depending  
on the application display mode  
currently in effect. See The TSX-1620  
for details on the application display  
modes.  
Using the Interface or Bridge menus,  
you can change the port display form  
shown in the Port Status boxes to any  
one of the following:  
- Oper Status  
Port Index  
- Type  
Click button 3 to display the Bridge  
Port menu when you are viewing the  
Bridge application display mode. See  
on page 2-6, for details on the  
application display modes.  
- Speed  
- Interface Number  
- MIB-II Statistics  
- Admin (Bridge)  
- Tp Frames Forwarded  
- Tp Frames Filtered  
- Sr Frames Forwarded  
- Bridge Port Number.  
When you change the port display  
form, the text in this box will change to  
reflect the chosen form. See Port  
Display Form, later in this chapter, for  
details.  
Figure 2-3. Mousing Around the TSX-1620 Hub View  
Using the Hub View  
2-5  
 
 
Using the TSX-1620 Hub View  
The TSX-1620 Application Displays  
The TSX-1620 Hub View has two different application display modes: Interface  
and Bridge. Each mode features different port display forms and offers different  
menus. The Interface application display is shown by default when the TSX-1620  
Hub View is launched. To switch between the Interface and Bridge application  
displays:  
1. Click on the module index or module type, at the top of the TSX-1620 port  
display column in the Hub View (see Figure 2-4, below). The Module menu  
will appear.  
2. Drag down to Application Display, then right to Interface or Bridge,  
depending on your intended selection. The Hub View will change to reflect  
your selection.  
Figure 2-4. Changing the TSX-1620 Application Display  
When you change the application display mode, the port display form will  
change to the default form for the chosen mode. For the Interface application  
display, the default port display form is Oper Status. For the Bridge application  
display, the default port display form is Admin. You can change the port display  
form from either application display mode using the Port Display Form selection  
from the Interface or Bridge menus. For details on the port display form selections  
available for each application display, see Port Display Form, later in this chapter.  
Each application display mode offers some different menus and menu selections,  
as illustrated in Figure 2-5 and Figure 2-6, below.  
2-6  
Using the Hub View  
 
   
Using the TSX-1620 Hub View  
The Interface Application Display  
The Interface application display allows you to view the interfaces according to  
MIB II status and statistics. The default port display form for the Interface  
application display is operational status (OperStatus).  
The Module Menu  
The Interface  
Menu  
Figure 2-5. The Interface Application Display Menu Structure  
Using the Hub View  
2-7  
 
 
Using the TSX-1620 Hub View  
The Bridge Application Display  
The Bridge application display allows you to view the bridging interfaces  
according to Bridge statistics; it also gives you access to the Bridge View and  
functions, as well as the Bridge Port menu. The default port display form for the  
Bridge application display is Admin.  
The Module Menu  
The Bridge Menu  
The Bridge Port  
Menu  
Figure 2-6. The Bridge Application Display Menu Structure  
Note that the Module menu offers the same selections for both application display  
modes.  
The Bridge menu, available only from the Bridge application display mode,  
allows you to launch the TSX-1620 Bridge View, which provides bridge  
monitoring and management functions for the TSX-1620 (see Chapter 3, TSX-1620  
Bridging, for details).  
2-8  
Using the Hub View  
 
 
Using the TSX-1620 Hub View  
Monitoring Device Performance  
The information displayed in the Hub View can give you a quick summary of  
device activity, status, and configuration. SPMA can also provide further details  
about hub performance via its four-level menu structure. The Device, Module,  
Interface/Bridge and Bridge Port menus give you control over the device at four  
levels for both the Interface and Bridge application displays and give you access  
to the tools, menus, and windows that let you monitor specific aspects of device  
performance, change display options, and set TSX-1620 operating and notification  
parameters. See Figure 2-5 and Figure 2-6 to view the different menus and their  
contents.  
Port Display Form  
You can change the type of information displayed for each port by using the Port  
Display Form option on the Interface or Bridge menus. Remember that you need  
to change the application display to the proper mode to access the desired menu  
To change the port display form:  
1. Click in the appropriate area to display the Interface or Bridge menu (refer to  
2. Drag down to Port Display Form, then right as necessary to select one of the  
port display options.The current selection will be displayed in the Port Display  
Form text box, just above the ports.  
Interface Port Display Form Options  
Oper Status  
The Oper Status port display form displays the current status of the port — ON,  
OFF, NLK (no link), Test, or --- (unknown). Oper Status is determined by a  
combination of MIB-II interface operational status (ifOperStatus), administrative  
status (ifAdminStatus), and the interface’s physical link status (if applicable).  
The ON status indicates that the interface’s operational status is determined as  
“UP”, that it has been administratively enabled, and that a physical link has  
been detected at the port. A status of ON indicates that the port can send and  
receive NMS packets, but does not indicate whether the port’s bridging  
functions are enabled.  
To determine whether a port’s bridging functions are enabled, change the application  
display mode to Bridge, and then select the Admin port display form. For more  
information, see the definition of the Admin port display form, below.  
NOTE  
Monitoring Device Performance  
2-9  
 
 
Using the TSX-1620 Hub View  
A status of OFF indicates that the port has been physically disabled, or is  
broken.  
NLK (no link) indicates that the interface’s operational status is determined as  
“UP”, and it has been administratively enabled, but no physical link state to  
the port has been detected.  
A status of Test indicates that the interface is in some operational or  
administrative test status, and is unable to pass packets.  
The --- (unknown) status indicates that the state of the port’s operational, link,  
and administrative states were not returned from the device.  
Type  
Displays the MIB-II ifType. As defined by the MIB “the type of interface,  
distinguished according to the physical/link protocol(s) immediately below the  
network layer in the protocol stack.”  
Speed  
Displays the operating speed of the interface; as defined by the MIB-II ifSpeed,  
“An estimate of the interface’s current bandwidth in bits per second. For  
interfaces which do not vary in bandwidth or for those where no accurate  
estimation can be made, this object should contain the nominal bandwidth.”  
Interface Number  
Displays each port’s interface number, including the network management port.  
Statistics  
From the Interface or Bridge menu, you can display any one of the statistics  
detailed below:  
Load will display the percentage of total, inbound, or outbound network load  
processed by each port during the last polling interval.  
-
Total will display the percentage of total, inbound, and outbound network  
load processed by each port during the last polling interval. This  
percentage reflects the network load generated per polling interval by  
devices connected to the port (determined by adding the change in the  
port’s MIB-II ifInOctets and ifOutOctets values during the last polling  
interval and multiplying by 800) compared to the port’s ifSpeed value.  
-
In shows the percentage of packets received during the last polling  
interval from devices connected to the port. This percentage reflects the  
packets received (determined by the change in the port’s MIB-II ifInOctets  
value during the last polling interval, multiplied by 800) compared to the  
port’s ifSpeed value.  
2-10  
Monitoring Device Performance  
 
Using the TSX-1620 Hub View  
-
Out shows the percentage of packets transmitted during the last polling  
interval to devices connected to the port. This percentage reflects the  
packets transmitted (determined by the change in the port’s MIB-II  
ifOutOctets value during the last polling interval, multiplied by 800)  
compared to the port’s ifSpeed value.  
Discards shows the percentage of total, inbound, or outbound packets that  
were discarded by the port during the last polling interval due to congestion  
or filtering.  
-
Total shows the percentage of packets that were discarded by the port  
(determined by adding the port’s MIB-II ifInDiscards and ifOutDiscards)  
during the last polling interval due to congestion or filtering. This  
percentage reflects the packets discarded compared to the total number of  
packets detected at the port:  
(ifInDiscards+ifOutDiscards)/(ifInUcastPkts+  
ifOutUcastPkts+ifInNUcastPkts+ifOutNUcastPkts).  
-
-
In shows the percentage of packets received by the port that were  
discarded (determined by the port’s MIB-II ifInDiscards value) during the  
last polling interval due to congestion. This percentage reflects the packets  
discarded compared to the total number of packets detected at the port:  
ifInDiscards/(ifInUcastPkts+ifOutUcastPkts+ifInNUcastPkts+  
ifOutNUcastPkts).  
Out shows the percentage of packets filtered (not forwarded) by the port  
(determined by the port’s MIB-II ifOutDiscards value) during the last  
polling interval. This percentage reflects the packets discarded compared  
to the total number of packets detected at the port:  
ifOutDiscards/(ifInUcastPkts+ifOutUcastPkts+ifInNUcastPkts+  
ifOutNUcastPkts).  
Errors shows the percentage of total, inbound, or outbound packets that were  
discarded by the port during the last polling interval due to hardware  
reception or transmission errors.  
-
Total shows the percentage of packets that were discarded by the port  
(determined by adding the port’s MIB-II ifInErrors and ifOutErrors  
values) during the last polling interval due to hardware reception or  
transmission errors. This percentage reflects the packets discarded  
compared to the total number of packets detected at the port:  
(ifInErrors+ifOutErrors)/  
(ifInUcastPkts+ifOutUcastPkts+ifInNUcastPkts+ifOutNUcastPkts).  
-
In shows the percentage of packets that were discarded by the port  
(determined by the port’s MIB-II ifInErrors value) during the last polling  
interval due to hardware reception errors. This percentage reflects the  
packets discarded compared to the total number of packets detected at the  
port: ifInErrors/(ifInUcastPkts+ifOutUcastPkts+ifInNUcastPkts+  
ifOutNUcastPkts).  
Monitoring Device Performance  
2-11  
 
Using the TSX-1620 Hub View  
-
Out shows the percentage of packets that were discarded by the port  
(determined by the port’s MIB-II ifOutErrors value) during the last  
polling interval due to hardware transmission errors. This percentage  
reflects the packets discarded compared to the total number of packets  
detected at the port:  
ifOutErrors/(ifInUcastPkts+ifOutUcastPkts+ifInNUcastPkts+  
ifOutNUcastPkts).  
Non-Unicast (Nucast) shows the percentage of packets transmitted or  
received by the port during the last polling interval that were multicast  
packets.  
-
-
-
Total shows the percentage of packets transmitted or received by the port  
during the last polling interval that were multicast packets. This  
percentage reflects the multicast packets detected (determined by adding  
the port’s MIB-II ifInNUcastPkts and ifOutNUcastPkts values) compared  
to the total number of packets detected at the port: (ifInNUcastPkts+  
ifOutNUcastPkts)/(ifInUcastPkts+ifOutUcastPkts+ifInNUcastPkts+  
ifOutNUcastPkts).  
In shows the percentage of packets received by the port during the last  
polling interval that were multicast packets. This percentage reflects the  
multicast packets detected (determined by the port’s MIB-II  
ifInNUcastPkts value) compared to the total number of packets detected  
at the port:  
ifInNUcastPkts/(ifInUcastPkts+ifOutUcastPkts+ifInNUcastPkts+  
ifOutNUcastPkts).  
Out shows the percentage of packets transmitted by the port during the  
last polling interval that were multicast packets. This percentage reflects  
the multicast packets detected (determined by the port’s MIB-II  
ifOutNUcastPkts value) compared to the total number of packets  
detected at the port:  
ifOutNUcastPkts/(ifInUcastPkts+ifOutUcastPkts+ifInNUcastPkts  
+ifOutNUcastPkts).  
For the statistical port display form options listed above, three dashes (---) will display for  
all inactive ports; any active (green) port will display a numeric value, even if it’s 0 (zero).  
NOTE  
Port Color Codes for the Interface Application Display  
For each port display form, the color-coding of each interface reflects a  
combination of MIB-II interface operational status (ifOperStatus), administrative  
status (ifAdminStatus), and the interface’s physical link status (if it applies).  
Green  
On — The interface’s operational status is returned as “UP” —  
and it has been administratively enabled; if the interface  
supports link state, a physical link has been detected at the port.  
2-12  
Monitoring Device Performance  
 
Using the TSX-1620 Hub View  
Yellow  
No Link — The interface’s operational status is returned as “UP”  
and it has been administratively enabled, but no physical link  
state to the port has been detected. This will not appear for  
interfaces that do not support link state.  
Blue  
Red  
Off — The interface is physically disabled (its operational status  
is returned as “DOWN”), and it had also been administratively  
disabled prior to entering the physically disabled state.  
Off — The interface is physically disabled (its operational status  
is returned as “DOWN”); however, prior to being physically  
disabled, the port had been in an administratively enabled state.  
(Magenta  
Gray (---)  
UNKnown — The interface cannot return the requested  
information.  
Unknown — The port’s ifOperStatus was not returned from the  
device; the state of the port cannot been determined.  
Bridge Port Display Form Options  
Admin  
Display’s the port’s current bridging status — FWD (forwarding), DIS (disabled),  
LIS (listening), LRN (learning), BLK (blocking), BRK (broken), or UNK  
(unknown). These bridge port status conditions are defined as follows:  
FWD (forwarding) when the interface is on-line and forwarding packets from  
one network segment to another.  
DIS (disabled) when bridging at the interface has been disabled by  
management, and no traffic can be received or forwarded on this interface.  
LIS (listening) when the interface is not adding information to the filtering  
database. It is monitoring Bridge Protocol Data Unit (BPDU) traffic while  
preparing to move to the forwarding state.  
LRN (learning) when the Forwarding database is being created, or the  
Spanning Tree Algorithm is being executed because of a network topology  
change.  
BLK (blocking) when the interface is on-line, but filtering traffic from going  
across the TSX-1620 from one network segment to another.  
BRK (broken) when the physical interface has malfunctioned.  
UNK (unknown) if the interface’s status cannot be determined.  
Tp Frames Forwarded  
Displays the percentage of Transparent bridging frames that have been  
transmitted to or received from the port’s attached segment that have been  
forwarded to their destination.  
Monitoring Device Performance  
2-13  
 
Using the TSX-1620 Hub View  
Tp Frames Filtered  
Displays the percentage of valid frames received by this port that were discarded  
by the forwarding process.  
Sr Frames Forwarded  
Displays the percentage of Source Route bridging frames that have been  
transmitted to or received from the port’s attached segment that have been  
forwarded to their destination.  
Bridge Port Number  
Displays the port’s bridge port number.  
Port Color Codes for the Bridge Application Display  
No matter which Bridge Port Status display form is selected, each bridge interface  
is color-coded to reflect the Bridge Port state, as follows:  
Blue — The bridge port is administratively Disabled.  
Magenta — The bridge port is in the Listening or Learning state.  
Green — The bridge port is on line and Forwarding.  
Orange — The bridge port is currently Blocking.  
Red — The bridge port is malfunctioning.  
Gray — No information is being returned from the interface; its ifOperStatus  
is not being returned.  
Clearing Statistical Information  
The Clear Stats selection in the TSX-1620 Module menu will reset the device’s  
statistical counters to zero. To reset the TSX-1620’s statistical counters:  
1. Click on the module index or module type to display the Module menu (see  
2. Drag down to Clear Stats, and release. The TSX-1620’s statistical counters  
will reset to 0, and begin updating at the rate determined by the Statistics  
polling interval.  
2-14  
Monitoring Device Performance  
 
Using the TSX-1620 Hub View  
Managing the Device  
In addition to the performance information described in the preceding section,  
the Hub View also provides you with the tools you need to configure your TSX-  
1620 and keep it operating properly. Device management functions include  
setting polling intervals, performing bridge configuration, setting community  
names, performing console configuration, performing If configuration,  
performing NetBIOS configuration, viewing and changing system information,  
configuring port security, viewing the interface list, accessing the MIB I, II Tool,  
accessing bridge management, performing source routing configuration for TSX-  
1620 ports, viewing a bridge port’s source address list, and enabling and disabling  
bridging for the ports.  
Setting the Polling Intervals  
To set the polling intervals used by SPMA and the TSX-1620:  
1. Click on to display the Device menu.  
2. Drag down to Polling Intervals, and release.  
Figure 2-7. TSX-1620 Polling Intervals  
3. To activate the desired polling, click mouse button 1 on the selection box to  
the right of each polling type field.  
4. To change a polling interval, highlight the value you would like to change, and  
enter a new value in seconds. Note that the Use Defaults option must not be  
selected, or values will revert back to default levels when you click on  
, and your changes will be ignored.  
Managing the Device  
2-15  
 
 
Using the TSX-1620 Hub View  
5. If you wish to use your new polling interval settings as the default values that  
SPMA will use for each TSX-1620 you are managing, use mouse button 1 to  
select the Save As Defaults option.  
6. If you wish to replace existing values with the current set of default values, use  
mouse button 1 to select the Use Defaults option.  
7. Click mouse button 1 on  
once your changes are complete.  
Changes take effect after the current polling cycle is complete.  
You can set the update intervals for the following:  
Contact Status  
This polling interval controls how often the TSX-1620 is “pinged” to check  
SPMA’s ability to maintain a connection with the device.  
Device General Status  
This polling interval controls how often the Hub View Front Panel Information —  
such as Uptime, Device Name, and so forth — and some port status information  
is updated.  
Device Configuration  
This polling interval controls how often a survey is conducted of the TSX-1620’s  
physical configuration; information from this poll would change the Hub View to  
reflect any changes in the device’s physical configuration.  
Port Operational State  
This polling interval controls the update of the information displayed in the Port  
Status boxes for each of the TSX-1620’s ports. Port state information includes the  
selected Port Display Form information and the associated color codes.  
Statistics  
This polling interval controls how often the information displayed in the Port  
Status boxes is updated when the Port Display Form is set to a statistical selection.  
SPMA generates network traffic when it retrieves the above-described information; keep  
in mind that shorter intervals mean increased network traffic. Range limits for these  
polling times are 0-999,999 seconds; however, an entry of 0 will be treated as a 1.  
NOTE  
2-16  
Managing the Device  
 
Using the TSX-1620 Hub View  
Using the Bridge Config Utility  
The Bridge Config utility allows you to enable or disable Spanning Tree for your  
TSX-1620, as well as define a group destination (multicast) MAC address to be  
used in implementing the source routing function. To access the Bridge Config  
window:  
1. Click on the module index or module type to display the Module menu (see  
2. Drag down to Module Utilities, then right to Bridge Config, and release.  
Figure 2-8. The Bridge Config Window  
To enable or disable Spanning Tree using the Bridge Config window:  
1. Click on the Spanning Tree: Enable or Disable option, as desired. Spanning  
Tree will be enabled or disabled for the TSX-1620, depending on your  
selection. The default selection is Disable.  
The Destination MAC address must be one of two group destination MAC  
addresses, as defined by the Source Routing specification. A frame containing the  
destination group address value c0:00:00:00:01:00 will be received by all stations  
on the sending station’s ring. A frame containing the destination group address  
value 80:41:00:00:00:00 will be received by all stations on all rings in a multi-ring  
network. To define or change the group destination (multicast) MAC address to  
be used in implementing the source routing function:  
1. Highlight the contents of the Destination MAC field. Type the desired group  
destination MAC address in Canonical (Token Ring) format, and then press  
Enter or Return on your keyboard.  
Managing the Device  
2-17  
 
Using the TSX-1620 Hub View  
Defining Community Names  
The Community Names utility allows you to configure up to eight different  
community names that determine read-only or read-write privileges for the  
device. This window also allows you to establish an IP address to which SNMP  
traps will be sent. To invoke the Community Name window from the TSX-1620  
Hub View:  
1. Click on the module index or module type to display the Module menu (see  
2. Drag down to Module Utilities, then right to Community Names, and  
release.  
Figure 2-9. The TSX-1620 Community Name Window  
The list at the top of the window contains entries for each of the eight available  
community name slots. Using this window, you can modify the names,  
permissions, and trap IP addresses for any of these eight available entries. To  
define or modify a community name entry:  
1. In the window’s Community Name list, click on the entry that you wish to  
define or modify. The list entry will be highlighted to show that it is selected. If  
you are modifying an existing community name entry, its index, name,  
permission setting, and trap IP address will display in the fields below the list.  
2. Highlight the contents of the Name field (if any), type the desired community  
name, and press Enter or Return on your keyboard. The selected list entry  
will change to reflect the new name.  
2-18  
Managing the Device  
 
Using the TSX-1620 Hub View  
3. To define permissions for the selected entry, click on the Read Only or Read  
Write option, as desired. The selected permission will be reflected in the list  
entry.  
4. To establish an IP address to which SNMP traps will be sent, highlight the  
contents of the Trap IP field, type the desired IP address, and press Enter or  
Return on your keyboard.The selected list entry will change to reflect the new  
trap IP address. The default value for this field is 0.0.0.0; if this field is left at  
the default value, no traps will be sent.  
The Refresh button initiates a new request for Community Name information.  
When this button is clicked, the TSX-1620 will be queried for its community name  
configuration, and any changes that have occurred since the window was opened  
(or since the Refresh button was last clicked) will be reflected in the Community  
Name window.  
ConfiguringYour TSX-1620’s Serial Port  
The Console Config utility allows you to configure your TSX-1620’s serial (local  
management) port. Using the Console Config window you can view the port’s  
hardware type, select its speed, define the number of bits per character and stop  
bits, configure the parity and flow control, and enable or disable ANSI graphics  
for the port. To launch the Console Config window from the TSX-1620 Hub View:  
1. Click on the module index or module type to display the Module menu (see  
2. Drag down to Module Utilities, then right to Console Config, and release.  
Managing the Device  
2-19  
 
Using the TSX-1620 Hub View  
Figure 2-10. The Console Config Window  
The Hardware field at the top of the window displays your serial port’s hardware  
type. To configure your serial port:  
1. Select your serial port’s speed by clicking on the menu button in the Speed  
field to display the Speed selection menu. Select the desired port speed from  
the menu.The menu will disappear, and your selection will be displayed in the  
menu button. Available speed selections are 1200, 2400, 4800, 9600, 19200,  
or 38400 bits per second.  
2. Select the number of bits in a character for the port by clicking on the menu  
button in the Bits Per Char field to display the Bits Per Character selection  
menu. Select the desired number of bits per character (7 or 8) from the menu.  
The menu will disappear, and your selection will be displayed in the menu  
button.  
3. Select the number of stop bits (one, one and a half, or two) for the port by  
clicking on the menu button in the Stop Bits field to display the Stop Bits  
selection menu. Select the desired number of stop bits from the menu. The  
menu will disappear, and your selection will be displayed in the menu button.  
4. Select the parity of the port by clicking on the menu button in the Parity field  
to display the Parity selection menu. Select the desired sense of parity (none,  
odd, even, mark, or space) from the menu.The menu will disappear, and your  
selection will be displayed in the menu button.  
2-20  
Managing the Device  
 
Using the TSX-1620 Hub View  
5. Designate the port’s flow control parameter by clicking on the menu button in  
the Flow Control field to display the Flow Control selection menu. Select the  
desired type of flow control (none, Rts-cts, or Xoff) from the menu. The menu  
will disappear, and your selection will be displayed in the menu button.  
6. Enable or disable the ANSI Graphics option for the port by clicking either the  
Enable or Disable option in the Graphics Mode field.  
Performing IF Configuration  
The IF Config utility allows you to establish Bridge and IP parameters for each  
port on your TSX-1620. Using the IF Configuration window, you can establish the  
bridge type, enable or disable NetBIOS and Spanning Tree, assign a priority level,  
and define or change the IP address, subnet mask, gateway address, and MAC  
address for each interface (port) on your device. To launch the IF Configuration  
window:  
1. Click on the module index or module type to display the Module menu (see  
2. Drag down to Module Utilities, then right to IF Config, and release.  
Figure 2-11. The IF Configuration Window  
Managing the Device  
2-21  
 
Using the TSX-1620 Hub View  
Changing the Displayed Interface  
The values and settings shown in the various fields in the window reflect the  
current configuration of the TSX-1620 port (interface) index displayed in the  
Interface field at the top of the window. If you change the interface number in the  
Interface field to a different valid ifIndex, the values and settings in the other  
fields will change to reflect the configuration of the new interface, allowing you to  
change the configuration if desired. To change the displayed interface:  
1. Highlight the contents of the Interface field, and type the ifIndex (interface  
number) of the port that you wish to view. Press Enter or Return on your  
keyboard, and the values and settings in the other fields in this window will  
change to reflect the configuration of the specified interface.  
Performing Interface Configuration  
With the desired interface’s configuration displayed in the IF Configuration  
window, you can change any of the settings for that interface, if desired. To do so:  
1. Change the type of bridging to be used for the interface by clicking on the  
menu button in the Bridge Type field to display the Bridge Type selection  
menu. Select the desired bridging type (unknown, transparent only, source  
route transparent, or source route only) from the menu. The menu will  
disappear, and your selection will be displayed in the menu button.  
2. Enable or disable NetBIOS Broadcast Reduction for the interface by selecting  
the Enable or Disable option in the Net BIOS field.  
3. Enable or disable Spanning Tree for the interface by selecting the Enable or  
Disable option in the Spanning Tree field.  
4. Assign a Token Ring priority level for the interface by highlighting the contents  
of the Priority field, typing the desired priority value, and pressing Enter or  
Return on your keyboard.You may assign any priority from 1 to 16.  
5. Assign an IP address to the interface by highlighting the contents of the IP  
Address field, typing the desired valid IP address in dotted decimal notation,  
and pressing Enter or Return on your keyboard. All of the TSX-1620’s  
interfaces should use the same address.  
6. Define a subnet mask to be used on the interface’s IP address by highlighting  
the contents of the Subnet Mask field, typing the desired valid subnet mask in  
dotted decimal notation, and pressing Enter or Return on your keyboard.The  
subnet mask defines the network and host portions of the IP address.  
7. Define a gateway address to be used by the interface by highlighting the  
contents of the Gateway Address field, typing the desired valid gateway  
address in dotted decimal notation, and pressing Enter or Return on your  
keyboard. The gateway address is used by SNMP/UDP when attempting to  
traverse routed IP networks.  
2-22  
Managing the Device  
 
Using the TSX-1620 Hub View  
8. Change the interface’s MAC address by highlighting the contents of the  
Physical Address field, typing the desired MAC address, and pressing Enter  
or Return on your keyboard.  
Viewing NetBios Information  
The NetBIOS utility allows you to view information about specific NetBIOS MAC  
addresses for which the TSX-1620 has forwarding and/or filtering information.  
Such information is used by the transparent bridging function when determining  
how to propagate a received frame. The NetBIOS Configuration window displays  
each detected NetBIOS MAC address and its corresponding name, port, and RIF  
field. To display the NetBIOS Configuration window:  
1. Click on the module index or module type to display the Module menu (see  
2. Drag down to Module Utilities, then right to Net Bios, and release.  
Figure 2-12. The NetBIOS Configuration Window  
Each NetBIOS MAC address for which the TSX-1620 has forwarding and/or  
filtering information is displayed in the list at the top of the window. This  
window will only display information about a MAC address after the device has  
received a frame from that address. When you highlight an entry in the list, its  
corresponding information is displayed in the fields beneath the list.  
Managing the Device  
2-23  
 
Using the TSX-1620 Hub View  
The NetBIOS Configuration window offers the following information about each  
NetBIOS MAC address:  
Name  
The NetBIOS name corresponding to the MAC address from which the TSX-1620  
has received a frame.  
Address  
The NetBIOS MAC address from which the TSX-1620 has received traffic.  
Port  
The port number on which a frame from its associated NetBIOS MAC address has  
been received.  
RIF  
The routing information field (RIF) of the frame which has been received from the  
associated NetBIOS MAC address.  
Viewing and Changing System Information  
The System Information utility allows you to view the TSX-1620’s firmware  
revision, view and change the system date and time, and enable or disable the  
daylight savings time setting which affects the system date and time. To invoke  
the System Information window:  
1. Click on the module index or module type to display the Module menu (see  
2. Drag down to Module Utilities, then right to System Information, and  
release.  
Figure 2-13. The System Information Window  
2-24  
Managing the Device  
 
Using the TSX-1620 Hub View  
The Software Revision field displays the device’s current revision of firmware. If  
you have an expansion module installed, this field will display the firmware  
revision for each module, separated by five ASCII spaces. The expansion  
module’s firmware revision will be displayed last.  
The Date and Time fields display the current system date and time. These fields  
may be edited. The Daylight Savings field shows the current daylight savings  
mode, and allow you to enable or disable the daylight savings setting.  
Setting the Device Date,Time, and Daylight Savings Mode  
To alter the TSX-1620’s system date and time, and enable or disable the daylight  
savings mode:  
1. Highlight the contents of the Date field, type the desired system date in  
MM/DD/YY format, and press Enter or Return on your keyboard.  
2. Highlight the contents of the Time field, type the desired system time in  
HH:MM:SS format, and press Enter or Return on your keyboard.  
3. To enable or disable daylight savings mode, click on the Enable or Disable  
option in the Daylight Savings field. When daylight savings mode is enabled,  
the system time will automatically be adjusted when daylight savings or  
standard time is in effect.  
Configuring Port Security  
The Port Security utility allows you to automatically enable or disable to any of  
the TSX-1620’s ports during specified days of the week and/or during specified  
times of the day. The main Port Security window displays security settings  
according to parameters specified in the Configure View window. The Configure  
Restrictions window allows you to restrict access to a port or a range of ports  
during a specified date and time or range of dates and times. To launch the Port  
Security utility:  
1. Click on the module index or module type to display the Module menu (see  
2. Drag down to Module Utilities, then right to Port Security, and release.  
Managing the Device  
2-25  
 
Using the TSX-1620 Hub View  
Figure 2-14. The Main Port Security Window  
The Port Security window will not list any security restrictions until you specify  
the parameters that you wish to view. These parameters are specified using the  
Configure View window, which is launched from the Port Security window.  
When you click on the Update button, the TSX-1620 will be queried for its port  
security configuration (according to the view parameters specified in the  
Configure View window), and any changes that have occurred since the window  
was opened (or since the Update button was last clicked) will be reflected in the  
main Port Security window.  
ViewingYour Port Security Settings  
To display the Configure View window:  
1. Click on at the bottom of the Port Security window. The Configure  
View window will appear.  
2-26  
Managing the Device  
 
Using the TSX-1620 Hub View  
Figure 2-15. The Configure View Window  
The Viewing Sort Priority buttons at the top of this window allow you to change  
the order in which your security information is displayed in the Port Security  
window. Each button allows you to choose from among Day, Port, Hour, and  
Status. To change the Viewing Sort Priority:  
1. Click on the First, Second, Third, and/or Fourth buttons to display the  
selection menu. Drag down to the parameter (Day, Port, Hour, or Status) that  
you wish to be displayed in the corresponding order in the Port Security  
window, and release. The selected parameter will appear in the button, and  
the parameter column order will change in the Port Security window.  
Using the Viewing Selection Criteria lists in the Configure View window, you can  
choose the information to be displayed in the Port Security window. You can  
choose to view all security configurations for a selected day of the week, for a  
certain hour of the day, for a certain port, and/or for enabled or disabled ports.  
You may also choose to display security information for a range of days, hours,  
and/or ports, as well as for both enabled and disabled ports. It is not necessary to  
choose from among all possible selection criteria. To configure your viewing  
selection criteria:  
1. In the Day selection list, select one or more days of the week for which you  
wish to view your security configuration.  
2. In the Port selection list, select one or more of the TSX-1620’s ports for which  
you wish to view your security configuration.  
Managing the Device  
2-27  
 
Using the TSX-1620 Hub View  
3. In the Hour selection list, select one or more hours of the day for which you  
wish to view your security configuration. Hour number 0 represents 12:00 am.  
4. In the Status selection list, select one or both status conditions (Enable or  
Disable) for which you wish to view your security configuration.  
5. Click on  
. All port security information matching the selected criteria  
will be displayed in the Port Security window.  
Clicking on the Clear button will deselect any selections you have made in the  
Configure View window.  
ConfiguringYour Port Security Settings  
The Configure Restrictions window allows you to configure your TSX-1620’s port  
security settings. Using this window, you can automatically enable or disable to  
any of the TSX-1620’s ports during specified days of the week and/or during  
specified times of the day. To display the Configure Restrictions window:  
1. Click on  
at the bottom of the Port Security window. The  
Configure Restrictions window will appear.  
Figure 2-16. The Configure Restrictions Window  
To configure the TSX-1620’s port security settings:  
1. In the Day selection list, select one or more days of the week for which you  
wish to enable or disable one or more TSX-1620 ports.  
2. In the Port selection list, select one or more of the TSX-1620’s ports that you  
wish to enable or disable during the specified time period(s).  
2-28  
Managing the Device  
 
Using the TSX-1620 Hub View  
3. In the Hour selection list, select one or more hours of the day for which you  
wish to enable or disable one or more TSX-1620 ports. Hour number 0  
represents 12:00 am.  
4. In the Status selection list, select Enable to enable the specified port or ports  
during the specified time period(s). Select Disable to disable the specified  
port or ports during the specified time period(s).  
5. Click on  
.Your TSX-1620 port security settings will be applied to the  
device, and the specified restrictions will be enacted during the appropriate  
time period(s).  
Clicking on the Clear button will deselect any selections you have made in the  
Configure Restrictions window.  
Viewing the Interface List  
The Interface List option in the Interface menu displays a list of each of the TSX-  
1620’s interface (port) numbers and their associated MAC addresses. Remember,  
to use the Interface menu, the TSX-1620 application display must be in the  
Interface mode. To display the Interface List window from the Hub View:  
1. Click in the Port Display Form text box to display the Interface menu (refer to  
2. Drag down to Interface List, and release.  
Figure 2-17. The Interface List Window  
Managing the Device  
2-29  
 
Using the TSX-1620 Hub View  
The Interface List window can display about a dozen interfaces at once; use the  
scroll bar to the right of the list to view additional interfaces, if necessary.  
Accessing the MIB I, II Tool  
You can access the MIB I, II Tool directly from the Hub View. You can view MIB II  
statistics for your TSX-1620 via this window.  
1. Click in the appropriate area to display the Interface menu (refer to Figure 2-3,  
on page page 2-5).  
2. Drag down to MIB II and release.The SNMP MIB2 System Group window will  
appear. For more information on the MIB I, II tool, see Chapter 2, Using the  
MIB I, MIB II Tool in the SPMA Tools Guide.  
You must be viewing the Interface application display mode in order to have access to the  
Interface menu and this option.  
NOTE  
Accessing Bridge Management  
You can access the Bridge View and associated bridge applications from the  
Bridge menu in the Hub View.  
1. Click in the appropriate area to display the Bridge menu (refer to Figure 2-3,  
on page page 2-5).  
2. Drag down to Bridge Mgmt and release. The Bridge View will be displayed.  
For more information on the Bridge View and the bridge applications, see  
Chapter 3, Using the TSX-1620 Bridge View.  
You must be viewing the Bridge application display mode in order to have access to the  
Bridge menu and this option.  
NOTE  
Performing Source Routing Configuration for a Port  
The TSX-1620 also provides virtual networking capability, allowing you to  
configure logical rings that include multiple physical rings attached to the front  
panel ports (e.g., physical rings inserted in ports 1, 2, 5, and 8 could all be  
assigned to a single virtual ring network, and would communicate as if they  
actually were on the same physical ring). These logical rings are achieved by  
assigning the same local segment value to each port that you wish to include in  
2-30  
Managing the Device  
 
Using the TSX-1620 Hub View  
the logical ring. The local segment value can be assigned using the Source  
Routing Configuration window, available from the Bridge Port menus in the Hub  
View and the Bridge View. To access the Source Routing Configuration window  
from the Hub View:  
1. Click button 3 on the Port Index or Port Status box of the desired port to  
display the Bridge Port menu.  
2. Drag down to SR Configuration, and release. The Source Routing  
Configuration window will appear. For more information on the Source  
Routing Configuration window and other bridge applications, see Chapter 3,  
Using the TSX-1620 Bridge View.  
You must be viewing the Bridge application display mode in order to have access to the  
Bridge Port menu and this option.  
NOTE  
Viewing a Bridge Port’s Source Address List  
You can use the Source Address option from the Bridge Port menu to view a  
bridge port’s source address list. The list in the Source Address window displays  
a MAC Address for each device communicating through a specific bridge port.  
Remember, to use the Bridge Port menu, the TSX-1620 application display must  
be in the Bridge mode. To invoke a bridge port’s Source Address window from  
the Hub View:  
1. Click button 3 on the Port Index or Port Status box of the desired port to  
display the Bridge Port menu.  
2. Drag down to Source Address, and release.  
Managing the Device  
2-31  
 
Using the TSX-1620 Hub View  
Figure 2-18. The Bridge Port Source Address Window  
The Interface field at the top of the window displays the interface number of the  
selected port.  
The Bridge Port Source Address window displays addresses of all devices that  
have transmitted packets that were detected by the selected bridge port within a  
time period less than the Filtering Database’s defined ageing time (addresses that  
have not transmitted a packet during one complete cycle of the ageing timer will  
be purged). The Filtering Database’s ageing timer is user-configurable; see  
Chapter 3, Using the TSX-1620 Bridge View, for details. The Bridge Port Source  
Address window can display about ten addresses at once; use the scroll bar to the  
right of the list to view additional addresses, if necessary.  
Enabling/Disabling Bridging for TSX-1620 Ports  
You can enable or disable bridging for individual TSX-1620 ports using the Bridge  
Port menus.  
Enabling and Disabling Bridge Ports  
When you disable a bridge port, you disconnect that port’s network from the  
bridge entirely. The port does not forward any packets, nor does it participate in  
Spanning Tree operations. Nodes connected to the network can still communicate  
with each other, but they can’t communicate with the bridge or with other  
networks connected to the TSX-1620. When you enable a port, the port moves  
from the Disabled state through the Learning and Listening states to the  
Forwarding state; bridge port state color codes will change accordingly.  
2-32  
Managing the Device  
 
Using the TSX-1620 Hub View  
You can enable and disable bridging for the TSX-1620’s ports from each port’s  
Bridge Port menu. Remember, to use the Bridge Port menu, the TSX-1620  
application display must be in the Bridge mode.  
To enable or disable an bridging across an individual port:  
1. Click button 3 on the Port Index or Port Status box to display the Bridge Port  
menu.  
2. Drag down to Enable or Disable, as appropriate, and release.  
For more information about bridging functions and how to determine the current state of  
each bridge port, see Chapter 3, Using the TSX-1620 Bridge View.  
NOTE  
Managing the Device  
2-33  
 
Using the TSX-1620 Hub View  
2-34  
Managing the Device  
 
Chapter 3  
Using the TSX-1620 Bridge View  
A brief explanation of bridging methods; a tour of the Bridge Traffic View; using the Detail View;  
monitoring bridge operation; using the Filtering Database; configuring bridge operating parameters;  
setting forwarding thresholds and notification options; setting polling parameters; enabling and  
disabling bridges  
The SPECTRUM Portable Management Application (SPMA) Bridge View  
presents a series of windows that describe the TSX-1620 bridge and its bridge  
interfaces. The Bridge View is available for devices that support the dot1dBridge  
MIB. You can monitor bridge activity and performance and manage bridge  
configuration for both Transparent and Source Routing bridging through the  
Bridge Traffic View and other related windows. The SPMA bridge application  
provides separate windows for configuring Source Route and Transparent  
bridging.  
Bridging Basics  
Bridges are used in local area networks to connect two or more network segments  
and to control the flow of packets between the segments. Ideally, bridges forward  
packets to another network segment only when necessary. Bridges are also used  
to increase the fault tolerance in a local area network by creating redundant  
bridge paths between network segments. This is so that in the event of a bridge or  
bridge segment failure, an alternate bridge path will be available to network  
traffic, without significant interruption to its flow.  
The method a bridge uses to forward packets, choose a bridge path, and ensure  
that a sending station’s messages take only one bridge path depends on the  
bridge’s type: Transparent or Source Routing. A third type of bridge — a Source  
Route Transparent (SRT) bridge —has both Source Routing and Transparent  
bridging capabilities.  
3-1  
 
Using the TSX-1620 Bridge View  
Transparent Bridging  
Transparent bridges are most common in Ethernet networks. Individual  
Transparent bridges monitor packet traffic on attached network segments to learn  
their network segment location in terms of which bridge port receives packets  
originated from a particular station (determined via the packet’s Source Address  
field). This information gets stored in the bridge’s Filtering Database. When in the  
Forwarding state, the bridge compares a packet’s destination address to the  
information in the Filtering Database to determine if the packet should be  
forwarded to another network segment or filtered (i.e., not forwarded). A bridge  
filters a packet if it determines that the packet’s destination address exists on the  
same side of the bridge as the source address.  
Transparent bridges in a network communicate with one another by exchanging  
Bridge Protocol Data Units, or BPDUs, and collectively implement a Spanning  
Tree Algorithm (STA) to determine the network topology, to ensure that only a  
single data route exists between any two end stations, and to ensure that the  
topology information remains current.  
Source Route Bridging  
Source Routing is typically used to connect two or more Token Ring network  
segments. Source Route bridges differ from Transparent bridges in that they do  
not build and then use a physical address database to make forwarding decisions.  
Instead, Source Route bridges read routing information included by the source  
station and added by other bridges in a packet’s header to determine where to  
forward the packet.  
In Source Routing, sending and receiving devices employ broadcast packets —  
otherwise known as explorer packets — to determine the most efficient route for a  
message to travel. Generally, before a station sends a message, it will first send a  
test packet to all stations on the same ring; if the sending station receives a  
response to this packet, it knows that it does not need to include routing  
information in the Routing Information Field (RIF) of this packet and all  
subsequent packets it sends to the same station (i.e., the packets are not source  
routed and will appear as transparent-style packets). If the sending station does  
not receive a response to the test packet, it will send an explorer packet to the  
destination; the explorer packet will be propagated by the network’s bridges as  
either All Paths Explorer (APE) packets or as one Spanning Tree Explorer (STE)  
packet. The task of both packet types is to get the destination station to return  
specific route information to the sending station.  
APE packets are sent to the destination station over every possible bridge path  
when multiple bridge paths are available between any two local area network  
stations. (Because of the method used by bridges to forward SR packets, the  
presence of data loops in a network is not an issue for SR packets as it is for  
packets that must be Transparently bridged.) The original APE frame contains no  
routing information (e.g., bridge numbers and ring numbers); it is propagated  
along all available paths to the destination station. Each bridge along the way  
adds its own bridge and ring numbers to the packet’s RIF before forwarding it,  
3-2  
Bridging Basics  
 
Using the TSX-1620 Bridge View  
thereby providing route information. The destination station directs replies to  
each APE packet to the sending station, which, ideally, considers the route  
traveled by the first reply received to be the most efficient route. The sending  
station then stores the route information and uses it to send subsequent  
transmissions to the same station.  
Alternatively, a sending station may send an STE frame. On receipt of an STE  
packet, a bridge can use the single bridge path as determined by the Spanning  
Tree Algorithm to forward one Spanning Tree Explorer (STE) frame instead of  
APE frames. In response to an STE packet, the destination station sends out one  
APE packet, which returns to the sending station information on all possible  
bridge paths. An STE packet is the only type of Source Route packet whose route  
is determined by the Spanning Tree Algorithm. Although the Spanning Tree  
Algorithm determines the bridge path an STE takes to the destination station, the  
bridge still uses Source Routing to forward the packet (i.e., for specifically-routed  
frames, the bridge will read and add information to the Routing Information Field  
in the packet’s header).  
Source Route Transparent Bridges  
A Source Route Transparent (SRT) bridge—otherwise known as a translational  
bridge—functions as both a Source Route bridge and a Transparent bridge,  
providing all the functionality of both bridging types. Only one method, however,  
is used to forward any single packet.  
On receipt of a packet, an SRT bridge will read a packet header’s routing  
information indicator (RII) bit to determine how to forward the packet. An RII set  
to 1 indicates that a Routing Information Field (RIF) is present in the packet; the  
bridge implements Source Routing accordingly. An RII value of 0 indicates that no  
RIF is present in the packet; in this case, the bridge will forward the packet using  
Transparent bridging. A translational bridge builds its Filtering Database from  
information it obtains from both source routed and transparently bridged  
packets.  
Accessing the Bridge Traffic View Window  
There are three ways to open the Bridge View: if you are working within a  
network management system, you can select the Bridge View option from the  
icon menu; specific directions for creating a TSX-1620 icon and accessing the icon  
menu can be found in the appropriate Installing and Using SPECTRUM for...  
guide. If you are working within the TSX-1620 Hub View, you can select the  
Bridge Mgmt option from the Bridge menu. If you are running in a stand-alone  
mode, type the following at the command line:  
spmarun bridge <IP address> <community name>  
Accessing the Bridge Traffic View Window  
3-3  
 
Using the TSX-1620 Bridge View  
The spmarun script invoked first in the above command temporarily sets the environment  
NOTES  
variables SPMA needs to operate; be sure to use this command any time you launch an  
application from the command line. This script is automatically invoked when you launch  
an application from the icon menu or from within the Bridge TrafficView.  
If there is a hostname mapped to your bridging device’s IP address, you can use  
<hostname> in place of <IP address> to launch the Bridge View. Please note, however,  
that the hostname is not the same as the device name which can be assigned via Local  
Management and/or SPMA; you cannot use the device name in place of the IP address.  
The community name you use to start the Bridge application must have at least  
Read access; for full management functionality, you should use a community  
name that provides Read/Write or Superuser access. For more information on  
community names, see Defining Community Names in Chapter 2, Using the  
TSX-1620 Hub View, the appropriate Installing and Using SPECTRUM for...  
guide, and/or the Community Names chapter in the SPMA Tools Guide.  
The Bridge Traffic View is the heart of the Bridge application. The first window to  
appear when you start the Bridge application, it contains a status display of the  
device’s bridge interfaces and contains the buttons and menus that provide access  
to all bridge monitoring and management functions.  
Navigating Through the Bridge Traffic View  
Within the Bridge Traffic View, you can click mouse buttons in different areas of  
the window to initiate management tasks. The following diagram shows you how  
to display the Bridge Traffic View Device and Port menus.  
3-4  
Accessing the Bridge Traffic View Window  
 
Using the TSX-1620 Bridge View  
Each box represents a bridge  
interface. Click button 3 anywhere  
within a Bridge Port box to display the  
Port menu. Click button 1 on a bridge  
interface to select it for display in the  
Detail View (at least two must be  
selected to activate the Detail View  
button).  
Click on the Device button  
to display the Device menu  
The Front Panel shows device-level  
summary information.  
Figure 3-1. Mousing Around the Bridge Traffic View  
To display the Device menu:  
1. Click on  
in the Bridge Traffic View front panel.  
To display a Port menu:  
1. Click mouse button 3 in a Bridge Port box.  
Accessing the Bridge Traffic View Window  
3-5  
 
Using the TSX-1620 Bridge View  
Bridge Traffic View Front Panel  
The right side of the Bridge Traffic View displays device summary information:  
Contact Status  
Contact Status is a color code that shows the status of the connection between  
SPMA and the device:  
Green means a valid connection.  
Blue means that SPMAis trying to reach the device but doesn’t yet know if the  
connection will be successful.  
Red means that SPMA has lost contact with the device.  
Uptime  
The time that the device has been running without interruption. The counter  
resets to 0 days 00:00:00 (X days HH:MM:SS) when one of the following occurs:  
Power to the device is cycled.  
The device is reset manually.  
Time and Date  
The date and time are taken from the device’s internal 24-hour clock, which you  
can set in the Bridge Status window; see The Bridge Status Window, page 3-12.  
Device Name  
This field displays the name you’ve assigned to this device in the Bridge Status  
Device Location  
This field displays the location you’ve assigned to this device in the Bridge Status  
If you have assigned a device name or location that contains more than 18 characters, only  
the first 18 will be displayed in the Bridge Traffic View. Check the Device Status window  
for the complete name and/or location, if necessary.  
NOTE  
IP Address  
The device’s Internet Protocol address. You cannot change the IP address from  
SPMA. For multi-interface devices, this will be the IP used to define the device  
icon (if you are using a management platform) or the IP used to launch the  
application (if you are running in stand-alone mode).  
MAC Address  
The device’s factory-set MAC hardware address.  
3-6  
Accessing the Bridge Traffic View Window  
 
Using the TSX-1620 Bridge View  
Clicking on the Device button displays the Device menu. The Device menu lets  
you perform the following:  
Open the Bridge Status window.  
Display a summary of bridge statistics.  
Open the Source Routing Configuration window.  
Open the Filtering Database window.  
Open the Find MAC Address window.  
Open the Spanning Tree Protocol window.  
Open the Polling Intervals window.  
If you need to call Cabletron’s Technical Support about a problem with the Bridge  
View, you’ll need the information provided in the Information window:  
System  
Description  
SPMA Bridge  
View version  
Figure 3-2. Bridge Information Window  
Clicking mouse button 1 on the Bridge Traffic View Quit button closes all Bridge  
View windows.  
The Bridge Port Display  
Each Bridge Port box in the Bridge Traffic View displays information about its  
corresponding bridge interface.  
Accessing the Bridge Traffic View Window  
3-7  
 
Using the TSX-1620 Bridge View  
The number of bridge interfaces appearing in the Bridge Traffic View depends on the  
NOTE  
number of different local segment numbers assigned to the TSX-1620’s physical ports.  
For example, if all of the TSX-1620’s physical ports have the same local segment identifier,  
the Bridge Traffic View will display a single bridge interface (port). If physical ports 1-5  
are assigned the same local segment identifier, and ports 6-16 are assigned another local  
segment identifier, the Bridge Traffic View will display two bridge interfaces, and so on. A  
port’s local segment identifier is assigned using the Source Routing Configuration  
The Bridge Port boxes are color-coded, reflecting their current status. Bridge Port  
boxes for disabled bridge ports are colored blue. Enabled bridge ports are colored  
green, yellow, or red, depending on the range in which the traffic volume through  
that interface falls. See Configuring Forwarding Thresholds, page 3-34, for  
complete instructions on assigning traffic ranges and their corresponding Bridge  
Port box colors.  
Bridge Port box fields are as follows:  
Port #  
The index number assigned to the bridge interface.  
Type  
The bridge port’s physical interface type (e.g. ethernet-csmacd, fddi, ppp, token  
ring, etc.).  
MAC  
The MAC address of the TSX-1620 port associated with the bridge interface.  
For the TSX-1620, the MAC address displayed for each bridge interface will be that of the  
first detected physical port assigned to each interface (e.g., if physical ports 6-16 are  
assigned to the same bridge interface, the MAC address displayed for that bridge interface  
will be that of port 6). The MAC address displayed for bridge interface 1 will always be  
that of port 1.  
NOTE  
The remaining information displayed in the Bridge Port boxes depends on  
selections made using the buttons located at the bottom of the Bridge Traffic View.  
Buttons, for instructions on using these buttons.  
Choosing Bridge Traffic Information: Bridge Traffic View Buttons  
The four buttons at the bottom of the Bridge Traffic View control the type of  
information that appears in some of the Bridge Port box fields. (The Port number,  
Type, and MAC address fields are not affected by any of these buttons.)  
3-8  
Accessing the Bridge Traffic View Window  
 
 
Using the TSX-1620 Bridge View  
The Frames/Admin, Source Routing/Transparent, and Delta/Percentage buttons  
each let you choose one of the two display modes for the Bridge Port boxes. The  
display mode visible on a button is the one not currently selected. Clicking on a  
button when the button displays the desired mode type chooses that mode type  
for the Bridge Port boxes. For example, the Frames/Admin button will display  
Frames when the Admin display mode is in effect and Admin when the Frames  
display mode is in effect.  
The Frames/Admin button allows you to change the information displayed in the  
Bridge Port boxes between traffic statistics (when Frames is selected) and port  
state/status (when Admin is selected).  
The Frames display mode shows the following Bridge Port information:  
Frms In—Displays the total number of frames, including BPDU frames,  
received at this bridge port from its attached network segment during the last  
polling interval.  
Frms Out—Displays the total number of frames, including BPDU frames,  
transmitted or forwarded through this port to its attached network segment  
during the last polling interval.  
Forwarded—Displays frames forwarded by this bridge port to another bridge  
port on the device during the last polling interval. You can change this display  
using the Delta/Percentage button (described in this section). When Delta is  
selected, this field displays the total number of frames forwarded by this  
bridge port to another port on the bridge during the last polling interval. When  
Percentage is selected, this field displays the percentage of all frames received  
by the port from its network segment that were forwarded to another port on  
the bridge during the last polling interval.  
When the Admin option is selected, the Bridge Port boxes display port Status —  
whether the port is enabled or disabled — and port State.  
Enabled  
The port is able to participate in bridging and the  
Spanning Tree Algorithm.  
Disabled  
The port cannot participate in bridging or Spanning Tree  
operations.  
Enabling and disabling a port changes its Port Status, not its Port State.  
A port’s State indicates whether or not the port is forwarding packets and  
participating in the exchange of BPDUs. The Spanning Tree Algorithm determines  
the state of each port in order to maintain an active topology with no data loops.  
As a port moves from the blocking to the forwarding state, it will remain in each  
state for the duration of the Forward Delay in order to prevent data loops while  
the active topology is changing. Possible port states are as follows:  
Disabled  
The port has been disabled by management; it cannot  
receive or forward traffic, and is not participating in the  
exchange of BPDUs.  
Accessing the Bridge Traffic View Window  
3-9  
 
Using the TSX-1620 Bridge View  
Blocking  
This port is not forwarding or receiving traffic (and  
therefore no physical address information is added to the  
Filtering Database) nor is it sending or receiving BPDUs.  
A port will enter the blocking state for two reasons: if it  
receives information that another bridge is the  
designated bridge to the network segment to which this  
port is attached, or immediately after it has been enabled  
by management.  
Listening  
This state is entered from the blocking state when the  
STA determines that this port should participate in frame  
relay. The port is processing BPDUs, but is not yet  
forwarding or receiving traffic or adding information to  
the Filtering Database.  
Learning  
Forwarding  
Broken  
The port is processing BPDUs, but is not yet relaying  
packets. The port is adding address information to the  
Filtering Database.  
A port enters this state from the Learning state. The port  
is relaying frames and processing BPDUs. A port in this  
state can enter the Disabled state by management.  
If the port is malfunctioning, this value will display in  
the State field.  
On the TSX-1620, you can use this button to change the Bridge Port display  
between Source Routing and Transparent bridging frame information. The title  
bar at the top of the Bridge Port display area indicates the frame type described in  
the bridge ports.  
This two-state button is active when you have bridge statistics displayed in the  
Bridge Port boxes (i.e., when Frames is selected); otherwise, it is grayed. When  
you click on Delta, the Forward field in the Bridge Port boxes displays the total  
number of frames forwarded by this bridge port to another port on the bridge  
during the last polling interval. When you click on Percentage, the Forward field  
in the Bridge Port boxes displays the percentage of all frames received by the port  
from its network segment that were also forwarded to another port on the bridge  
during the last polling interval.  
The Detail View button lets you take a closer look at traffic between two bridge  
ports. The Detail View button is grayed unless you have two bridge ports  
selected. For complete instructions on how to use the Detail View, see the next  
section.  
3-10  
Accessing the Bridge Traffic View Window  
 
Using the TSX-1620 Bridge View  
Using the Detail View Window  
The Detail View provides port-level information on two bridge ports.  
For the TSX-1620, the Detail View can only be used if you have only two bridge ports  
configured (i.e., if you have more than two different local segment numbers assigned  
among all of your physical ports). If three or more bridge ports have been configured, you  
will be unable to select any bridge ports to view in the Detail View.  
NOTE  
To open the Detail View:  
1. In the Bridge Traffic View, select two bridge ports by clicking mouse button 1  
on both ports; the selected Port boxes will be outlined, and the top part of  
each selected box will be grayed. The Detail View button becomes active  
once you select both bridge ports.  
2. Click on the Detail View button. The Detail View window appears.  
Figure 3-3. Detail View Showing Two Ports  
Using the Detail View Window  
3-11  
 
 
Using the TSX-1620 Bridge View  
Each port shows the total frames transmitted and  
received by the port.  
Port summary information includes Port Index (at  
the top of the Bridge Port box), Port Status,  
Bridge Port State, and Frames Forwarded.You  
can display Frames Forwarded as a delta value  
(the total number of frames forwarded by this  
bridge port to any other port on the bridge during  
the last polling interval) or as a percentage value  
(showing the percentage of all frames received by  
the port from its attached network segment during  
the last polling interval that were forwarded to  
another port on the bridge) by clicking the  
Delta/Percentage button at the bottom of the  
Each corner of the bridge port summarizes  
activity to another bridge port.You can display  
Forwarded To as a delta value (the total number  
of frames forwarded by this bridge port to the  
specified port on the bridge during the last polling  
interval) or as a percentage value (showing the  
percentage of all frames received by the port  
during the last polling interval that were forwarded  
to the specified port on the bridge) by clicking the  
Delta/Percentage button at the bottom of the  
Figure 3-4. Port Boxes in the Detail View  
The diagram in Figure 3-4 explains the Detail View bridge port information.  
The Bridge Status Window  
You can set or change the device name or location— which display in the Bridge  
Traffic View Front Panel—in the Bridge Status window.  
The Contact field is the only Bridge Status window field not displayed in the  
Bridge Traffic View Front Panel. Use the Contact box to record the name and  
phone number of the person responsible for the device.  
To set or change information for any of the Bridge Status window fields:  
1. Display the Device menu by clicking on the Front Panel  
button.  
2. In the Device menu, drag down to Status and release.  
3-12  
The Bridge Status Window  
 
   
Using the TSX-1620 Bridge View  
3. In the Status window, highlight a text box, type in the new information; press  
Enter or Return on the keyboard to set your changes before selecting a new  
field.  
Figure 3-5. Bridge Status Window  
Although Date and Time fields are present in the TSX-1620’s Bridge Status window,  
these values are not supported for the TSX-1620. Any attempt to set a device date or time  
using this window will result in an error message.  
NOTE  
The Bridge Statistics Window  
The Bridge Statistics window displays generic information about all ports  
associated with the device.  
To open the Bridge Statistics window:  
1. In the Bridge Traffic View window, click on  
menu.  
to display the Device  
2. Drag down to Bridge Statistics and release. The Bridge Statistics window  
appears.  
The Bridge Statistics Window  
3-13  
 
Using the TSX-1620 Bridge View  
Figure 3-6. Bridge Statistics Window  
The Bridge Statistics window displays the following information:  
Bridging Type  
Type refers to the type of bridging supported by the bridge.  
unknown  
transparent-only  
sourceroute-only  
srt (Source Route Transparent)  
Total Ports  
Shows the total number of bridge ports supported by this device.  
Port  
Displays each port’s index number.  
IfIndex  
Interface index; a unique value for each network (interface) to which this port  
connects. Only a WAN port will connect to more than one interface  
simultaneously.  
PortCircuit  
When dealing with X.25 virtual circuits, it’s possible for two Port Indexes to have  
the same IfIndex. In such a case, Port Circuit contains the value of a MIB object  
instance unique to the port; otherwise, Port Circuit is equal to 0.0. For example, if  
Port 1 maps to IfIndex 1 and Port 2 maps to Ifindex 1, then the Port Circuits are 1.1  
and 1.2 respectively.  
DelayExceedDiscard  
The number of frames a port has discarded due to an excessive transit time  
through the bridge.  
3-14  
The Bridge Statistics Window  
 
Using the TSX-1620 Bridge View  
MtuExceedDiscard  
Mtu stands for “maximum transfer unit”; it is the largest frame size that can be  
processed by the TSX-1620. A port discards any received frames that are larger  
than the Mtu; this field lists how many such frames were discarded.  
The information in the Bridge Statistics window is a snapshot of the data. When  
you open the Bridge Statistics window, the application polls the devices for  
information. Devices are not polled again until you click mouse button 1 on the  
Update button, or close, then re-open the Statistics window.  
When a device is reset, statistics windows and/or statistics displays in the Bridge View  
windows may display very large numbers for one polling interval. This is due to the  
resetting of counters.  
NOTE  
The Filtering Database Window  
In Transparent bridging, each bridge port uses the device’s Filtering Database to  
determine a packet’s route through the bridge. The Filtering Database is created  
from permanent entries made via management, and from entries learned as the  
bridge collects and stores the source address and port association from each  
packet it receives.  
When in the Forwarding state, the bridge examines each received packet and  
compares the destination address to the contents of the Filtering Database. If the  
destination address is located on the network from which the packet was  
received, the bridge filters (does not forward) the packet. If the destination  
address is located on a different network, the bridge forwards the packet to the  
appropriate network. If the destination address isn’t found in the Filtering  
Database, the bridge forwards the packet to all networks. To keep Filtering  
Database entries current, older entries are purged after a period of time, which is  
called the Dynamic Ageing Time.  
The Filtering Database has two types of entries: Forwarding and Static. The  
Forwarding view of the Filtering Database contain addresses that the bridge  
learns from network traffic (also known as dynamic entries) as well as all the  
static entries. Learned entries are subject to the bridge’s Dynamic Ageing Timer;  
entries that aren’t accessed within the time specified by the ageing timer are  
purged. Static entries may be subject to the ageing timer, depending on how the  
entries were added. Static entries enter the Filtering Database in two ways: either  
automatically, when permanent database entries are copied to the Filtering  
Database, or manually when you move a Forwarding entry to the Static Table.  
The Filtering Database Window  
3-15  
 
Using the TSX-1620 Bridge View  
Cabletron has extended the functionality of the Ethernet port on translational bridges, so  
the port can be set to Source Route mode.  
NOTES  
When an Ethernet port is in Source Route mode, on receipt of an SR packet from the Token  
Ring port, it will save the Source Routing information and send out the packet  
transparently. When the response comes back, the source routing information will be  
restored and sent to the Token Ring port.  
Viewing the Filtering Database  
To open the Filtering Database window:  
1. Display the Device menu by clicking on the Front Panel  
button.  
2. Drag down to Filtering Database, and release.  
3. At the top of the Filtering Database window, click mouse button 1 on the  
appropriate selection box to view either the Forwarding or Static database.  
Click mouse button 1 on  
the type of entry you want  
to display, either  
Forwarding  
Static.  
or  
Figure 3-7. Filtering Database Window  
3-16  
The Filtering Database Window  
 
Using the TSX-1620 Bridge View  
Two fields at the top of the Filtering Database window provide information about  
the Filtering Database:  
Ageing Time (secs)  
The current setting of the bridge’s Dynamic Ageing Timer, used to purge  
Forwarding entries from the Filtering Database, or to purge static entries subject  
to the ageing timer.  
Learned Entry Discards  
The number of database entries that never made it into the Filtering Database due  
to a lack of buffer space. Ideally, this number should be 0. If this number grows, it  
indicates a very busy network. A value other than 0 is acceptable as long as it isn’t  
increasing, indicating that the lack of buffer space is sometimes causing problems,  
but that the condition is not persistent.  
For each entry in the Forwarding database, the window displays the following:  
Source Address  
Displays the MAC addresses of devices that have transmitted frames to the  
bridge.  
Port  
Identifies the bridge port where frames from the noted source address are  
received. A value of 0 indicates that the address exists within the Filtering  
Database, but the database has not yet learned the corresponding port number.  
Status  
Indicates how the entry got into the database:  
learned—The address was copied into the database from the source address  
field of a received frame.  
self—Identifies one of the bridge ports.  
management—Indicates an entry that was entered into the database manually.  
The status field of all static entries in the Forwarding Table will display  
management.  
invalid—The entry is a learned entry that has aged out, but has not yet been  
flushed from the table.  
other—The bridge is unable to determine the entry’s status.  
The information displayed for the Static database is somewhat different; for each  
entry, the window displays the following:  
Source Address  
Displays the MAC addresses of devices that have transmitted frames to the  
bridge.  
The Filtering Database Window  
3-17  
 
Using the TSX-1620 Bridge View  
Receive Port  
Displays the port on which a packet with the specified source address must be  
received in order for the filtering actions specified in the Destination Port field to  
take place. A setting of 0 will apply the filtering action anytime a packet with the  
specified source address is received by any of the bridge ports.  
Destination Port  
Displays the port or ports to which frames that have the specified source address  
and were received on the specified port or ports will be forwarded. Note that  
packets with the specified source address received on the specified port or ports  
will be blocked from any ports not listed in this field.  
If the number of Destination Ports exceeds what the Destination Ports column is  
able to display, Destination Ports for that filter appear as a hex string that maps to  
actual port numbers.  
For example, a Destination Port entry of B54180E0 represents ports 1, 3, 4, 6, 8, 10,  
16, 17, 25, 26, and 27. Here’s how to translate the hex string to port numbers:  
1. Translate each hex integer into a four-digit binary value:  
B
5
4
1
8
0
E
0
1011 0101  
0100  
0001  
1000  
0000  
1110  
0000  
2. Each “1” in the binary bitmask represents a Destination Port number:  
B
5
4
1
8
0
E
0
1011 0101  
0100  
0001  
1000  
0000  
1110  
0000  
1,X,3,4 X,6,X,8 X,10,X,X X,X,X,16 17,X,X,X X,X,X,X 25,26,27,X X,X,X,X  
Status  
Indicates the assigned permanence of the entry:  
permanent—The entry won’t be aged out or deleted on reset.  
deleteOnReset—The entry will be deleted when the bridge is reset.  
deleteOnTimeout—The entry is subject to the ageing timer.  
The buttons at the bottom of the window provide the following functions:  
The Delete button is only available when the Filtering Database window is  
showing Static entries and one entry in the list is selected. Use the Delete button to  
remove an entry from the Static Table; see Deleting a Static Table Entry,  
The Change button is only available when the Filtering Database window is  
showing Static entries and one entry in the list is selected. Use the Change button  
to change the selected port’s receive port/destination ports settings; see  
Changing Forwarding and Static Database Entries, page 3-20.  
3-18  
The Filtering Database Window  
 
Using the TSX-1620 Bridge View  
Since the Forwarding table cannot be edited, you must add an entry to the Static  
Table in order to change or delete it, as desired. Use the Add to Static Table to add  
a forwarding entry to the static database.  
The Ageing Time determines how long a Forwarding entry (or a Static entry with  
deleteOnTimeout status) is retained before being discarded due to inactivity. Use  
the Change Ageing Time button to set a new Ageing Time; see the following  
section for details.  
Use the Find button to search the Filtering Database for a specific MAC address;  
see Finding a Filtering Database MAC Address, page 3-22.  
The Filtering Database window shows a snapshot of the database. Clicking  
mouse button 1 on the Update button displays the current database.  
Changing the Filtering Database Dynamic Ageing Time  
The Dynamic Ageing Time determines how long an entry remains in the Filtering  
Database before being purged due to inactivity. Purging older entries ensures that  
the Filtering Database is always using current information to make filter/forward  
decisions.  
During a topology change, the Forward Delay is used as the Filtering Database Ageing  
Time, which ensures that the Filtering Database will contain current topology  
NOTE  
information.  
To change the Dynamic Ageing Time:  
1. In the Filtering Database window, click mouse button 1 on the Change  
Ageing Time button to open the Change Ageing Time window.  
The Filtering Database Window  
3-19  
 
Using the TSX-1620 Bridge View  
2. Highlight and edit the Ageing Time  
(in seconds), and then click mouse  
button 1 on the Apply button.  
or  
3. Use mouse button 1 to drag the slide  
bar, then click Apply.  
or  
4. Click mouse button 1 next to the slide  
to increment the time in 100 second  
jumps, then click Apply.  
As you change the ageing time,  
SPMA converts seconds to  
days:hours:minutes:seconds.  
Figure 3-8. Changing the Filtering Database Ageing Time  
Changing Forwarding and Static Database Entries  
The only entries that can be changed or deleted in the Filtering Database are static  
entries. If the entry you wish to change or delete is a forwarding entry, you must  
add it to the Static Table. The Static Table (Figure 3-9) is used to change a  
forwarding entry to a static or permanent entry, or make changes to existing static  
entries. To open the Static Table window:  
1. Open the Filtering Database window by clicking on the Front Panel  
button; drag down to Filtering Database to display the Filtering Database  
window.  
2. If the Filtering Database window displays Forwarding entries, highlight the  
entry you want to change and click on the Add to Static Table button.  
or  
If the Filtering Database window displays Static entries, highlight an entry and  
click on the Change button.  
It is also possible to open the Static Table in either case without highlighting an entry, by  
clicking on the Add To Static Table button. The static address field will appear blank.  
Enter the MAC address that you want to add to the Static Table.  
NOTE  
3-20  
The Filtering Database Window  
 
 
Using the TSX-1620 Bridge View  
Figure 3-9. Static Table Window  
Static Address  
The Static Address field will display the MAC address of the entry you  
highlighted in the Filtering Database window. If no entry was selected, the  
address field will contain zeros, and a valid MAC address may be entered.  
Receive Port  
The Receive Port list box specifies the port on which packets from the specified  
static address must be received in order for the static database entry to apply. If  
All is selected, the entry will be applied to packets forwarded to any port.  
Forward To Ports  
The Forward To Ports list box specifies the ports to which packets with the  
specified source address received on the specified ports will be forwarded. The  
port or ports selected in this list will be displayed in the Filtering Database  
window as the Destination Port.  
To change an entry:  
1. Click mouse button 1 on the port in the Receive Port list box that you want to  
specify as the receive port for the entry in the Static Address field (remember  
that if All is selected, the entry will be applied to packets received on any  
port).  
2. Click mouse button 1 on any port or ports in the Forward To Ports list that  
you want to be displayed in the Filtering Database window as the destination  
port.  
3. Click mouse button 1 on the Status button and choose one of the following:  
permanent—The entry won’t be aged out or deleted on reset.  
The Filtering Database Window  
3-21  
 
 
Using the TSX-1620 Bridge View  
deleteOnReset—The entry will deleted when the bridge is reset.  
deleteOnTimeout—The entry is subject to the ageing timer.  
4. After you set the entry’s status, click mouse button 1 on the Apply button.  
Deleting a Static Table Entry  
To delete a Static Table entry:  
1. In the Filtering Database window, click mouse button 1 in the appropriate  
selection box to display the Static database.  
2. Select the entry you want to delete by clicking it with mouse button 1.  
3. Click on the Delete button.  
Finding a Filtering Database MAC Address  
To nd a source address in the Filtering Database:  
1. In the Filtering Database window, click on the  
Find MAC Address window.  
button to open the  
or  
In the Bridge Traffic View, display the Device menu by clicking on the Front  
Panel button. Drag down to Find MAC Address.  
2. In the edit box, enter a valid MAC  
address and then press the  
Return key. If the address is found  
in the Filtering Database, its port  
location and status will appear in  
the list box. If it is not found, a  
separate window will appear with  
a “Not Found” message.  
Figure 3-10. Find MAC Address Window  
The Spanning Tree Protocol Window  
Bridges in a network collectively implement a Spanning Tree Algorithm (STA) to  
detect and eliminate data loops in a network containing parallel bridges.  
3-22  
The Spanning Tree Protocol Window  
 
   
Using the TSX-1620 Bridge View  
In a network designed with multiple bridges placed in parallel (i.e., attached to  
the same network segment), Spanning Tree selects a controlling Root Bridge and  
Port for the entire bridged local area network, and a Designated Bridge and Port  
for each individual network segment. The Root bridge is the one that selects one  
of two or more available bridge paths between two end stations, basing its  
decision on factors associated with each of the bridges in the path. A Designated  
Port/Bridge for a network segment relays frames toward the Root Bridge, or from  
the Root Bridge onto the network segment. When data passes from one end  
station to another across a bridged local area network, it is forwarded through the  
Designated Bridge/Port for each network segment towards the Root Bridge,  
which in turn forwards frames towards Designated Bridges/Ports on its opposite  
side.  
During the Root Bridge selection process, all bridges on the network  
communicate STA information via Bridge Protocol Data Units (BPDUs). It is with  
BPDUs that the bridges collectively determine the current network topology and  
ensure that all bridges have current topology information.  
The Spanning Tree Protocol window displays information used by the network  
bridges to select the Root Bridge and parameters that affect the bridge’s  
participation in Spanning Tree operations.  
To open the Spanning Tree Protocol window:  
1. Click on the Front Panel  
button.  
2. Drag down to Spanning Tree and release.  
Figure 3-11. Spanning Tree Protocol Window  
The Spanning Tree Protocol Window  
3-23  
 
Using the TSX-1620 Bridge View  
The Spanning Tree Protocol window displays the following information:  
Spanning Tree Version  
The version shows the Spanning Tree Protocol type employed by this bridge:  
IEEE 802.1d  
DEC LAN 100  
None  
You must use either 802.1d or DEC to interconnect all bridges in a network using  
parallel bridges. By default, a Cabletron bridge turns on the 802.1d Spanning Tree.  
All of Cabletron’s bridge products have the ability to use either the 802.1d or DEC  
Spanning Tree version, or they can be set so that no version is in effect. (A bridge  
should be set to None if there are no redundant loops incorporated within the  
network.)  
All bridges in a network must use the same Spanning Tree version. Mixing Spanning Tree  
Algorithm protocols will cause an unstable network.  
!
CAUTION  
Designated Root  
This value represents the bridge that is the current Root Bridge as determined by  
the STA. The Designated Root value consists of the configurable portion of the  
bridge ID (i.e., the first two octets of the eight-octet-long bridge ID) and the TSX-  
1620’s MAC address (the last six octets of the bridge ID). This value is used as the  
Root Identifier parameter in all configuration BPDUs originated from this node.  
Num.Topology Chgs.  
Indicates the number of times the bridge’s Topology Change flag has been  
changed since the bridge was powered up or initialized. The Topology Change  
flag increments each time any of the network’s bridges enters or leaves the  
network or when the Root Bridge ID changes.  
The values for the following three fields—Forward Delay, Max Age, and Hello  
Time—represent the values that are currently being used by all bridges, as  
dictated by the Root bridge. In the Spanning Tree Protocol window, you can view  
and set the values—Root Forward Delay, Root Max Age, Root Hello Time—that  
will be in effect when the bridge for which you are setting the parameters  
becomes the Root Bridge.  
Forward Delay  
The length of time, in seconds, that controls how long a bridge port remains in  
each state (Forwarding, Learning, Listening, etc.) when moving toward the  
Forwarding state. During a topology change, the Forward Delay is also used as  
the Filtering Database Ageing Time, which ensures that the Filtering Database  
will contain current topology information. The Root Bridge sets the Forward  
Delay.  
3-24  
The Spanning Tree Protocol Window  
 
Using the TSX-1620 Bridge View  
Max Age  
The current setting for the bridge’s BPDU ageing timer, in seconds. The ageing  
timer defines the maximum number of seconds that a Configuration BPDU is  
retained by the bridge before it is discarded. During normal operation, each  
bridge in the network receives a new Configuration BPDU before the ageing timer  
expires. If the timer expires before a new Configuration BPDU is received, it  
indicates that the former Root is no longer active. The remaining bridges begin  
Spanning Tree operation to select a new Root. The Root Bridge determines the  
Max Age. The range for this field is from 6 to 40 seconds, with a default value of  
20 seconds.  
Hello Time  
Indicates, in seconds, the length of time the Root Bridge, or bridge attempting to  
become the Root, waits before resending a Configuration BPDU. The Root Bridge  
determines the Hello Time.  
Priority  
The Spanning Tree Algorithm assigns each bridge a unique identifier, which is  
derived from the individual port’s MAC address and its priority as determined  
by the Spanning Tree Algorithm or your setting. The bridge with the lowest value  
of bridge identifier is selected as the Root. A lower priority number indicates a  
higher priority; a higher priority enhances a bridge’s chance of being selected as  
the Root.  
Acceptable values range from 0-FFFF and can be edited to change the network  
topology, if needed. The default is 8000.  
Root Port  
The port identifier (i.e., the physical index number) for the port that provides the  
lowest cost path to the Root Bridge. The Root Port field displays 0 if this bridging  
device is the Root Bridge.  
Root Cost  
Indicates the cost of the data path from this bridge to the Root Bridge. Each port  
on each bridge adds a “cost” to a particular path that a frame must travel. For  
example, if each port in a particular path has a Path Cost of 1, the Root Cost  
would be a count of the number of bridges along the path. This field will read 0 if  
the TSX-1620 is the Root Bridge. See Changing a Port’s STA Parameters,  
page 3-29, to find out how to set a port’s Path Cost.  
Hold Time  
The minimum time, in seconds, that can elapse between the transmission of  
Configuration BPDUs. The Hold Time ensures that Configuration BPDUs are not  
transmitted too frequently through any bridge port. Receipt of a Configuration  
BPDU starts the Hold Time count at a device. If the Hold Time expires, the port  
invokes the Transmit Configuration BPDU procedure, which sends configuration  
change information to the Root. The Hold Time is a fixed value, as specified by  
the IEEE 802.1d specification.  
The Spanning Tree Protocol Window  
3-25  
 
Using the TSX-1620 Bridge View  
The values for the Forward Delay, Max Age, Hold Time, and Hello Time fields are stored  
NOTE  
within the MIB in units of hundredths of a second rather than seconds; your Cabletron  
management application converts hundredths of a second to seconds for display purposes.  
You can use any SNMP Set Request tool to edit the values for these three fields; just  
remember that you must enter your values in hundredths of seconds, rather than in  
seconds.  
Root Forward Delay  
The Forward Delay (in seconds) that will be implemented by this bridge if it is the  
Root or becomes the Root. (The Root Bridge in the network sets the Forward  
Delay for all bridges in the Spanning Tree network.)  
The IEEE 802.1d specification recommends that Forward Delay = 15 seconds, with  
an allowable range of 4 to 30 seconds.  
To ensure proper operation of the Spanning Tree Algorithm, the IEEE 802.1d specification  
recommends that you always observe the following relationship between Forward Delay  
and Max Age:  
TIP  
2 x (Forward Delay - 1.0) > Max Age  
Root Max Age  
The Max Age value (in seconds) that will be implemented if this bridge is the Root  
or becomes the Root. (The Root Bridge in the network sets the Max Age for all  
bridges in the Spanning Tree network.)  
The IEEE 802.1d specification recommends that Max Age = 20 seconds, with an  
allowable range of 6 to 40 seconds.  
Root Hello Time  
The Hello Time that will be implemented if this bridge is the Root or becomes the  
Root.  
The IEEE 802.1d specification recommends that Hello Time = 2 seconds, with an  
allowable range of 1 to 10 seconds.  
The Spanning Tree Port Table button opens the window in which you set  
Spanning Tree parameters for individual bridge ports; see The Spanning Tree  
Port Parameters Window, page 3-27, for more information.  
3-26  
The Spanning Tree Protocol Window  
 
Using the TSX-1620 Bridge View  
Changing Spanning Tree Parameters  
To change the Bridge Priority, Root Forward Delay, Root Max Age, or Root Hello  
Time:  
1. In the Spanning Tree Protocol window, highlight the current value of the field  
you want to change.  
2. Type the new value in the appropriate text box and press Enter or Return on  
the keyboard.  
The Spanning Tree Port Parameters Window  
The Spanning Tree Algorithm ensures that only a single bridge path exists  
between any two end stations in a network designed with multiple bridges  
placed in parallel; it also ensures that on any given bridge, only one port path  
exists between the bridge and any one network segment. In the Spanning Tree  
Port Table you can view and edit the Spanning Tree values for individual ports;  
the Spanning Tree Port parameters affect a port’s participation in the Spanning  
Tree.  
Setting Spanning Tree Port Parameters only affects port selection on a particular bridge;  
settings do not affect the TSX-1620’s device-level priority in the network’s Spanning Tree.  
NOTE  
To open the Spanning Tree Port Table window:  
1. Display the Device menu by clicking on the Front Panel  
button.  
2. Drag down to Spanning Tree to open the Spanning Tree Protocol window.  
3. In the Spanning Tree Protocol window, click on the SpanningTree PortTable  
button.  
or  
1. In the Bridge Traffic View, click mouse button 3 on a port to display the Port  
menu and drag down to Spanning Tree.  
The scroll list at the top of the window lists each bridge port available on the  
device and its current port priority. Below the Port List, the window includes the  
following:  
Priority (Port)  
If two or more ports on the same bridge are connected to the same network  
segment, each port will receive the same device-level values for Root ID, Root  
Cost, and Bridge ID in Configuration BPDUs. In this case, the BPDU’s port-level  
information—the transmitting port’s identifier and its manageable Priority  
The Spanning Tree Port Parameters Window  
3-27  
 
 
Using the TSX-1620 Bridge View  
component— is used to determine which port on this bridge will be the  
Designated Port for that segment. A lower number indicates a higher priority; the  
default is 80. The allowable range is 0 to FF.  
Path Cost  
The portion of the total path cost associated with this port. Lowering a port’s Path  
Cost makes a port more competitive in the selection of the Designated Port. The  
default value is 100 for Cabletron bridges. The allowable range is from 1 to 65535.  
Figure 3-12. Spanning Tree Port Parameters Window  
Designated Cost  
The cost of the path from this port to the Root Bridge on the network. If the  
highlighted port is the Root Port, the Designated Cost is 0. If this bridge is the  
Root Bridge, all its bridge ports have a Designated Cost of 0. This value is  
compared to the Root Path Cost field in received configuration BPDUs.  
Designated Root  
The unique Bridge Identifier of the bridge that is assumed to be the Root Bridge  
on the network; this information is contained in the Configuration BPDUs.  
3-28  
The Spanning Tree Port Parameters Window  
 
Using the TSX-1620 Bridge View  
Designated Bridge  
Displays the MAC address and priority component of the Bridge ID for the bridge  
that is believed to be the Designated Bridge for the network segment associated  
with this port.  
The Designated Bridge ID, along with the Designated Port and Port Identifier  
parameters for the port, is used to determine whether this port should be the  
Designated Port for the network segment to which it is attached.  
Designated Port  
The Port ID of the port on the Designated Bridge for this port’s segment. The  
Designated Port is the bridge port that offers the lowest path cost to the Root  
Bridge.  
Forward Transitions  
The number of times this port has moved from the Learning state to the  
Forwarding state since the device was started or since it was last reset.  
Changing a Port’s STA Parameters  
To change a port’s Priority or Path Cost:  
1. In the scroll list, click mouse button 1 on the port you want to change (use the  
scroll bar if necessary to display the desired port).You can only select one  
port at a time. The highlighted port’s Spanning Tree parameters appear in the  
boxes below the list.  
2. Highlight and edit the Priority and Path Cost boxes as required. After you  
type in the new value in a box, press Enter or Return on the keyboard.  
The Source Routing Configuration Window  
The Source Routing Configuration window allows you to view, set, and change  
Source Routing configuration options for ports on the TSX-1620. Using this  
window, you can assign logical ring numbers to the TSX-1620’s physical ports via  
the Local Segment field. If you assign the same local segment number to multiple  
physical ports, the TSX-1620 will treat all segments attached to those ports as if  
they were on the same physical ring.  
To open the Source Routing Configuration window from the Bridge Traffic View:  
1. Display the Device menu by clicking on the Front Panel  
button.  
2. Drag down to SR Configuration.  
or  
1. In the Bridge Traffic View, click mouse button 3 on a port to display the Port  
menu underage down to SR Configuration.  
The Source Routing Configuration Window  
3-29  
 
   
Using the TSX-1620 Bridge View  
The scroll list at the top of the window lists each physical TSX-120 port and its  
Spanning Tree Explorer (STE) Span Mode, which determines how this port will  
behave when presented with an STE packet. Possible values are as follows:  
auto-span  
This value can only be returned by a bridge that  
implements the Spanning Tree Protocol. A port set to  
auto-span will forward an STE packet when it is in the  
Forwarding state; otherwise, it will discard the packet.  
disabled  
forced  
This value indicates that the port will not accept or send  
STE packets; any STE packets received will be discarded.  
This value indicates that the port will always accept and  
propagate STE packets, regardless of its port state.  
Figure 3-13. Source Routing Configuration Window  
Interface  
The port number highlighted in the scroll list. The Interface number indicates the  
port selected in the list box and described by the other fields in the window.  
Hop Count  
The Hop Count Limit (HCL) stops a frame from being forwarded over more than  
the specified number of bridge hops; it sets the maximum number of routing  
3-30  
The Source Routing Configuration Window  
 
Using the TSX-1620 Bridge View  
descriptors (bridge hops) allowed in a packet’s Routing Information Field. A  
bridge port will discard any explorer packets whose RIF’s exceed the maximum  
number of routing descriptors.  
Local Segment Number  
Normally, when assigning local segment numbers, you must assign a unique  
number to each network segment in a network; this field represents the network  
segment to which this port is attached physically. The bridge adds the Local  
Segment number to the routing information field of source route discovery  
frames. Valid entries range from 0 to 4095. A value of 65535 indicates that no  
segment number is assigned to this port. For the TSX-1620, you can assign the  
same local segment number to separate physical rings attached to multiple ports  
on the TSX-1620, and the device will treat them as if they were a single ring. For  
each separate local segment number defined for the TSX-1620’s ports, a separate  
Bridge Port box will be displayed in the Bridge View.  
Bridge Number  
A Bridge Number uniquely identifies this bridge port when two bridge ports are  
used to span the same two segments; otherwise unique Bridge Numbers are not  
necessary for individual ports. The Bridge Number should be in the range of 0 to  
15. The value 65535 indicates that no Bridge Number is assigned.  
Target Segment Number  
The unique network number of the target network segment that the bridge  
attaches to. Valid entries range from 0 to 4095. A value of 65535 indicates that no  
target segment number is assigned to this port. Individual ports on a TSX-1620  
should each be assigned unique values for this field.  
The TSX-1620 does not use the Target Segment Number field because it has more than  
two ports and therefore could have multiple target segments for each local segment.  
NOTE  
Largest Frame  
The maximum size of a frame’s INFO field that this port can send or receive. The  
default value for this field is set in the TSX-1620’s firmware. When it receives an  
explorer frame, the bridge uses its Largest Frame value to decide if it should  
modify the Routing Control field of the Routing Information field. A Source Route  
bridge has the ability to embed this information into the explorer packets so that  
end stations can adjust their Mtu size accordingly.  
Possible Largest Frame sizes as defined by the 802.5 source routing bridging  
specification are 516, 1500, 2052, 4472, 8144, 11407, 17800, and 65535.  
The Source Routing Configuration Window  
3-31  
 
Using the TSX-1620 Bridge View  
A Source Route-capable bridge has the ability to embed Largest Frame size information  
NOTES  
into the explorer packets. If there are multiple bridge hops from one end node to another,  
this allows the end stations to realize the maximum frame size limits for any network  
segment in the path between them, and adjust their Mtu size accordingly.  
If there are multiple hops from one end node to another, consider the lowest Largest Frame  
Size of all network segments and bridges in the path when setting the Largest Frame Size.  
It is possible that an older bridge may support a lower maximum frame size; subsequently  
the stations would have to reduce their Mtu size in order to communicate over it. Largest  
Frame size is different for 4 and 16 Mbps Token Rings (4,500 bytes and 18,000 bytes,  
respectively), and Ethernet network segments have a maximum frame size of 1,500 bytes.  
STE Span Mode  
The Spanning Tree Explorer Span Mode determines how a bridge port behaves  
when it receives an STE packet (also known as Single Route Explorer packet).  
Possible STE Span modes are disabled, forced, and auto-span, as described earlier  
in this section.  
Changing Source Routing Port Parameters  
To change a port’s Hop Count, Local Segment, Bridge Number, or Target  
Segment:  
1. In the Source Routing Configuration window, use the scroll list to display the  
physical TSX-1620 port for which you want to change values.  
2. Select a port by clicking mouse button 1 on the port you want to change.You  
can only select one port at a time. The port’s index number and Source  
Routing parameters appear in the boxes below the list.  
3. Highlight and edit the Hop Count, Local Segment, Bridge Number, and  
Target Segment boxes as required.  
4. Once you have made all of your edits, click on the Apply button.  
To change a port’s Largest Frame or STE Span Mode:  
1. In the Source Routing Configuration window, use the scroll list to display the  
physical TSX-1620 port you want to change.  
2. Click mouse button 1 on the port you want to change (you can only select one  
port at a time). The port’s Source Routing parameters appear in the boxes  
below the list.  
3. Click on the Largest Frame or STE Span Mode button and then drag to the  
appropriate menu choice. The selected value appears on the button.  
4. Once you have made all of your choices, click on the Apply button.  
3-32  
The Source Routing Configuration Window  
 
Using the TSX-1620 Bridge View  
Creating Bridge Traffic Charts, Graphs and Meters  
The Bridge application uses the SPMA Charts, Graphs and Meters tools to depict  
bridge statistics describing activity at the bridge-port level. Once running,  
however, a pie chart, graph or meter is independent from the application where it  
was started. Although the windows you open to create pie charts, graphs and  
meters have unique variable lists, the procedures for creating a pie chart, a graph  
or a meter are the same.  
Graphing capabilities are provided by an application that is included in HP Network  
Node Manager and IBM NetView; therefore, graphs are only available when SPMA is  
NOTE  
run in conjunction with one of these network management platforms. If you are running  
SPMA in a stand-alone mode or in conjunction with SunNet Manager, no graphing  
capabilities are available and no graph-related options will be displayed on buttons or  
menus. Note that the screens displayed in this guide will include the graph-related  
options where they are available; please disregard these references if they do not apply.  
To access the Pie Chart, Graph and Meters tools from the Bridge Traffic View Port  
menus:  
1. Click mouse button 3 on a Bridge Port box to display the Bridge Port menu.  
2. Drag down to select Pie Chart or Graphs/Meters—>Transparent or Source  
Routing, as appropriate.  
Figure 3-14. Pie Chart Window  
Creating Bridge Traffic Charts, Graphs and Meters  
3-33  
 
Using the TSX-1620 Bridge View  
For complete descriptions of chart, graph and meter variables and details on how  
to create and control a pie chart, graph or meter, see the chapter on charts, graphs  
and meters in the SPMA Tools Guide.  
Configuring Forwarding Thresholds  
You can define notification thresholds for bridge port forwarding levels and then  
have SPMA use those thresholds to do one or more of the following:  
Color code the Bridge Port display boxes  
Send Internet mail to a registered user  
Launch a program on your management workstation  
To open the Forwarding Thresholds window:  
1. Click button 3 anywhere within a Bridge Port display box in the Bridge View to  
display the Port menu.  
2. In the Port menu, click button 3 on Forwarding Thresholds —>Transparent  
or Source Routing to open the Forwarding Thresholds window.  
Since the Transparent and Source Routing Threshold windows look and function  
the same, the window is described only once.  
3-34  
Configuring Forwarding Thresholds  
 
 
Using the TSX-1620 Bridge View  
A traffic level is the specified  
value of forwarded frames as a  
percentage of total received  
frames.  
You can specify traffic levels that  
define the boundary between the  
low and medium ranges and  
between the medium and high  
ranges.  
When SPMA polls the device and  
detects that the percentage of  
forwarded frames has moved into  
a new range, heading either up or  
down, the notification options and  
conditions in use for that port take  
place.  
Figure 3-15. Port Forwarding Thresholds Window  
SPMA polls a bridge at preset intervals, as defined in the Polling Intervals window  
accessed from the Bridge View Device menu. A port’s traffic level can pass from one range  
to the next and then back to the original level between polls from SPMA. When this  
occurs, SPMA won’t record that the threshold has been passed because the event was  
never observed.  
NOTE  
To set bridge port thresholds, notification options, and notification conditions:  
1. In the Forwarding Thresholds window, highlight the port where you want to set  
thresholds.You can select multiple ports by clicking button 1 on each one. To  
deselect a port, click it again. To apply the settings to all bridge ports, you can  
use the options provided at the bottom of the screen rather than selecting all  
ports in the scroll list.  
Configuring Forwarding Thresholds  
3-35  
 
Using the TSX-1620 Bridge View  
2. In the Modify Range section of the Forwarding Thresholds window, you can  
edit the line that displays the high end of the Low and Mid ranges, or you can  
use the slide bars to specify the thresholds.You can also assign a color to  
each of the three ranges.The Bridge Port boxes on the Bridge Traffic View will  
be colored according to the settings made here (i.e., if you assign the color  
red to the High traffic range, then a Bridge Port box will be colored red when  
its traffic range is High). To set the high end of the Low and Mid ranges, and  
assign color codes to all three ranges:  
a. Change the upper limit of the Low and Mid traffic ranges by highlighting  
the value, typing the new value, and pressing Enter or Return.You may  
also change the value by moving the slide bar next to the value you wish  
to change until the desired range is reached.  
b. By default, bridge ports are color coded in the Bridge Traffic View  
according to their traffic level: Low range is green; Mid range is yellow;  
High range is red. To assign color codes to the three traffic ranges, click  
on the Low, Mid, or High buttons to the left of the range fields, drag to  
highlight the desired color, and release. The selected color will be  
displayed on the button, and will be used in the Bridge Port boxes when  
the color’s corresponding range is reached.  
3. In the Notification Options section, you can enable/disable threshold event  
logging, enable/disable the Bridge Port box colors, and assign threshold  
events (send mail or execute a program) to the different (or to all) threshold  
ranges. To do so:  
a. To disable threshold event logging, deselect the Log Changes in State  
checkbox. By default, all threshold events are logged. For more  
information about the Forwarding Log, see Viewing the Forwarding Log  
on page 3-37.  
b. To enable/disable the colors, click button 1 on the Color box.When colors  
are disabled, the Bridge Port box colors in the Bridge Traffic View remain  
as they were when the colors were last enabled.  
c. To send mail or execute a program when a threshold range is reached,  
first click the Threshold Range button to which you want to apply the  
threshold event. To send mail for a threshold event, select the Send Mail  
box and enter the name of a registered mail user. To have a threshold  
event launch a program, select the Execute Program (Args) box and  
enter the name of an executable file, including required arguments.  
4. Notification Conditions make your Notification Options subject to defined  
conditions:  
a. If you check the In—Out—In box, notification takes place when the  
threshold passes from one range to another and then back. The number  
in the Delay box specifies the number of times this transition is to take  
place before notification is launched. The Current box counts down the  
transitions.  
3-36  
Configuring Forwarding Thresholds  
 
Using the TSX-1620 Bridge View  
b. If you select the Remain—In box, notification takes place when the  
threshold passes from one range to another, and stays in that range for  
the number of polling cycles specified in the Delay box.  
c. If you check the Once Only box, notification only takes place the first time  
the Delay count is reached.  
5. The Save option gives you three choices as to how the options and conditions  
you have selected will be saved.  
a. If you choose Disabled, none of the options and conditions you have  
chosen will be saved to the bridge database.  
b. If you select As Default, the chosen options and conditions will be saved  
as default values.The saved information will be used for any IP not having  
an entry in the bridge database.  
c. If you select By IP, the options and conditions chosen for that IP will be  
saved to the bridge database, and the next time the application is run for  
this device the saved values will be used.  
6. When you’re finished setting thresholds and notification options, click button 3  
on the Apply button and choose either Selected Only or All. Selected Only  
applies the selected Forwarding Thresholds settings to the ports that are  
highlighted in the scroll list near the top of the Forwarding Thresholds window.  
Viewing the Forwarding Log  
The Forwarding Log records an entry each time a bridge port’s traffic passes a  
preset traffic threshold. By default, logging is enabled for all bridge ports.  
To open the Forwarding Log window:  
1. In the Bridge Traffic View, click mouse button 3 in one of the bridge ports to  
display the Port menu.  
2. In the Port menu, click button 3 on Forwarding Log and then drag right to  
Transparent or Source Routing.  
Viewing the Forwarding Log  
3-37  
 
 
Using the TSX-1620 Bridge View  
Figure 3-16. Sample Forwarding Log Window  
The Transparent and Source Routing Forwarding Log windows look and function  
the same.  
To select a different Bridge Port log:  
1. Use the slide bar at the top of the Forwarding Log window to select a different  
port.  
To clear all logs or just the current log:  
1. Click on the Clear button and then select the appropriate choice, either  
Current Log or All Logs.  
To change the number of entries retained by the log:  
1. Highlight the Max Number line, type a new number and press Return on the  
keyboard.  
Log entries are stored in the SPMA software. When the maximum number of entries is  
reached, the entries get aged out as necessary, starting with the oldest entry first.  
NOTE  
3-38  
Viewing the Forwarding Log  
 
Using the TSX-1620 Bridge View  
To save log files:  
1. Click on the Save button and select either Current Log or All Logs to open  
the Save Log window.  
2. In the Save Log window, enter a file name for the file to be saved and then  
click on the OK button. The default directory for saved log files is the current  
directory. To specify a different directory, include the path name with the log  
file name.  
To disable the Forwarding Log of all bridge ports or individual bridge ports:  
1. Click button 3 on the appropriate Bridge Port box to display the Port menu.  
2. In the Port menu, click button 3 on Forwarding Thresholds and then drag  
right to either Transparent or Source Routing.  
3. In the Forwarding Thresholds window, deselect the Log Changes in State  
box.  
4. Click on the Apply button and then click on either Selected Only or All.  
Changing Polling Intervals  
Much of the information displayed in the Bridge Traffic View is gathered  
periodically rather than continuously. You can edit the times between these  
periodic polls.  
To edit the polling times:  
1. Display the Device menu by clicking on the Front Panel  
button.  
2. Drag down to Polling Intervals and release. The Polling Intervals window  
displays.  
Figure 3-17. The Polling Intervals Window  
3. Highlight and edit the Device Info and Bridge Port Display Info boxes and  
then click on the Apply button to save changes.  
Changing Polling Intervals  
3-39  
 
Using the TSX-1620 Bridge View  
You can change values for the following polling interval fields:  
Device Info  
Specifies the time, in seconds, that SPMA waits before updating the Front Panel  
information (Uptime, Location, and so forth) in the Bridge Traffic View.  
Bridge Port Display Info  
Specifies the time, in seconds, that SPMA waits before updating statistical and  
status information in the Bridge Traffic View port display boxes.  
Enabling and Disabling Ports  
When you disable a bridge port, you disconnect that port’s network from the  
bridge entirely. Nodes connected to the network can still communicate with each  
other, but they can’t communicate with the bridge and other networks connected  
to the bridge.  
In Transparent bridges, the disabled port does not forward any packets, nor does  
it participate in Spanning Tree operations. When you enable a port on a  
Transparent bridge, the port moves from the Disabled state through the Blocking,  
Learning, and Listening states to the Forwarding state.  
The procedures for enabling and disabling Source Routing bridge ports are  
slightly different from the procedures used to enable and disable for Transparent  
Bridge ports. The SPMA Bridge application also gives you the option of  
simultaneously disabling both Source Route and Transparent ports on an SRT  
bridge.  
Enabling and disabling a port changes its Port Status, not its Port State. An enabled port  
is able to participate in bridging and Spanning Tree operations. A disabled port on a  
Transparent bridge does not participate in bridging or Spanning Tree operations.  
NOTE  
Enabling and Disabling a Transparent Bridge Port  
To enable or disable a Transparent bridge port:  
1. In the Bridge Traffic View, display the Port menu by clicking mouse button 3 in  
a Bridge Port box. Select the port that connects to the network that you want  
to enable or disable.  
2. In the Port menu, click button 3 on Enable or Disable, drag right to  
Transparent, and release.  
When you disable a Transparent bridge port, the port’s display box turns blue.  
When you enable a Transparent bridge port, the port’s color changes to indicate  
Enabling and Disabling Ports  
3-40  
 
Using the TSX-1620 Bridge View  
the forwarding threshold range. (Port color codes are only active if the Color box  
is selected in the Forwarding Thresholds window. Color codes are on by default.)  
Enabling and Disabling a Source Routing Bridge Port  
With Source Routing bridging, you can disable all traffic through a particular  
bridge port, or only traffic that would otherwise be forwarded to a specific port.  
For example, you can disable all traffic that would be forwarded from port 2 to  
port 4, but allow traffic to be forwarded from port 2 to ports 1 and 3.  
The Enable/Disable Source Routing window lets you enable or disable Source  
Routing traffic between the selected port (the port you used to open the window)  
and any other bridge port.  
To enable or disable a Source Routing bridge port:  
1. In the Bridge Traffic View, display the Port menu by clicking mouse button 3 in  
the Bridge Port box that represents the network that you want to enable or  
disable.  
2. In the Port menu, click on Enable or Disable, drag right to Source Routing,  
and release to open the Enable/Disable Source Routing window.  
Figure 3-18. Port Enable/Disable Source Routing Window  
3. Select one or more Destination Ports in the scroll list by clicking mouse button  
1 to highlight selections in the list.  
4. To enable or disable all Destination Ports, click on the Enable or Disable  
button and choose All from the drop-down menu. To enable or disable the  
ports you highlighed in the scroll list, click on the Enable or Disable button  
and choose Selected from the drop-down menu.  
Enabling and Disabling Ports  
3-41  
 
Using the TSX-1620 Bridge View  
Enabling and Disabling Both Transparent and Source Routing on a  
Bridge Port  
To enable or disable both Source Routing and Transparent bridging on a port:  
1. In the Bridge Traffic View, display the Port menu by clicking mouse button 3 in  
a Bridge Port box. Select the port that connects to the network that you want  
to enable or disable.  
2. With mouse button 3, drag down to Enable or Disable—>Both. Both Source  
Route and Transparent bridging for the port will be enabled or disabled, as  
selected.  
3-42  
Enabling and Disabling Ports  
 
Index  
Bridge Statistics window 3-13  
accessing 3-13  
Bridge Status window  
setting and changing information 3-12  
Bridge Traffic View buttons 3-8  
Bridge Type 2-22  
A
Add to Static Table button 3-20  
Admin 2-13  
Admin button 3-9  
Ageing Time 3-17, 3-19  
All Paths Explorer (APE) packet 3-2  
application display menu structure 2-7, 2-8  
application display mode  
changing 2-6  
Bridge View 2-8  
access levels 3-4  
accessing 2-30  
changing front panel information 3-12  
launching 3-3  
auto-span mode 3-30  
bridging type 3-14  
sourceroute-only 3-14  
srt 3-14  
transparent-only 3-14  
unknown 3-14  
BRK 2-13  
B
Bits Per Char 2-20  
BLK (Blocking) 2-13  
BPDU ageing timer 3-25  
Bridge 2-6  
Bridge application display 2-8  
Bridge Application Display Menu Structure  
2-8  
Bridge Config utility 2-17  
Bridge menu 2-8  
Bridge Number 3-31  
Bridge Port box 3-7  
color coding 3-8  
bridge port Color codes 3-36  
Bridge Port Display Form  
Options 2-13  
Bridge Port Display Info 3-40  
Bridge Port Number 2-14  
bridge port state 3-9  
blocking 3-10  
broadcast packet 3-2  
C
change the Dynamic Ageing Time 3-19  
clear network logs 3-38  
Clear Stats 2-14  
Color Codes  
Bridge Application Display 2-14  
Interface Application Display 2-12  
color codes 2-3  
Community Names utility 2-18  
Configuration BPDU 3-25  
Console Config utility 2-19  
Contact Status 2-3, 2-16, 3-6  
creating icons 1-2  
broken 3-10  
disabled 3-9  
Current box 3-36  
forwarding 3-10  
learning 3-10  
listening 3-10  
D
daylight savings time 2-24  
decLb100 3-24  
Delay box 3-36  
DelayExceedDiscard 3-14  
deleteOnReset entry status 3-18, 3-22  
deleteOnTimeout entry status 3-18, 3-22  
bridge port status 3-9  
disabled 3-9  
enabled 3-9  
bridge port Traffic levels 3-35  
Bridge Ports, enabling/disabling 2-32  
Bridge Protocol Data Units (BPDUs) 3-2, 3-23  
Index-1  
 
Index  
Delta button 3-9, 3-10  
Designated Bridge 3-23, 3-29  
Designated Cost 3-28  
Designated Port 3-23, 3-29  
Designated Root 3-24, 3-28  
Destination MAC address 2-17  
Destination Port 3-18  
Destination Ports 3-18  
Detail View 3-10  
STE Span Mode 3-30  
Forward 3-9  
Forward Delay 3-9, 3-19, 3-24  
Forward Transitions 3-29  
forwarding entry 3-15  
Forwarding Log 3-37  
Forwarding state 3-15  
Forwarding Threshold Log window  
accessing 3-37  
Forwarding Thresholds window  
accessing 3-34  
Frames button 3-9  
port summary information 3-12  
Detail View bridge port info 3-12  
Device button 2-4  
bridge 3-7  
Frms In 3-9  
Frms Out 3-9  
Front Panel 2-16, 3-5  
front panel 2-3  
Device Configuration 2-16  
Device General Status 2-16  
Device Info 3-40  
Device Location 3-6  
FWD (Forwarding) 2-13  
Device menu 2-4  
bridge 3-7  
Device Name 2-4, 3-6  
Device Performance  
G
Gateway Address 2-22  
Graphics Mode 2-21  
monitoring 2-9  
DIS (Disabled) 2-13  
H
disable a bridge network 3-40  
disable bridge ports 2-33  
disable the Forwarding Log 3-39  
disabled  
STE Span Mode 3-30  
Discards 2-11  
Hardware 2-20  
HCL 3-30  
Hello Time 3-25  
History window 1-4  
Hold Time 3-25  
Hop Count 3-30  
hostname 2-2, 3-4  
Hub View 2-1, 2-3  
navigating 2-2  
opening 2-1  
discovering Cabletron devices 1-2  
Dynamic Ageing Time 3-15, 3-19  
E
enable bridge ports 2-33  
Enabling/Disabling Ports 2-32  
Errors 2-11  
Hub View Front Panel 2-16  
I
Execute Program 3-36  
explorer packet 3-2  
icon menus, accessing 1-2  
IF Config utility 2-21  
IfIndex 3-14  
F
In Discards 2-11  
In Errors 2-11  
In Load 2-10  
In Non-Unicast 2-12  
Info button  
Filtering Database 3-2  
accessing 3-16  
firmware revision  
viewing 2-24  
firmware version 1-7  
Flow Control 2-21  
FN100 Bridge View 2-8  
FN100 Hub View 2-5  
forced  
bridge 3-7  
INFO field 3-31  
In—Out—In box 3-36  
Interface 2-6  
Index-2  
 
Index  
Interface application display 2-7  
Interface Application Display Menu  
Structure 2-7  
NetBIOS utility 2-23  
NLK 2-13  
Non-Unicast 2-12  
notification conditions 3-35  
notification options 3-35  
Number of Topology Changes 3-24  
Interface List 2-29  
Interface Number 2-10  
Interface port display form  
options 2-9  
invalid entry status 3-17  
IP Address 2-4, 2-22, 3-6  
O
OFF 2-13  
ON 2-12  
Once only 3-37  
L
Largest Frame 3-31  
Learned Entry Discards 3-17  
learned entry status 3-17  
LIS (Listening) 2-13  
Load 2-10  
local management port 2-19  
Local Segment Number 3-31  
Location 2-4  
open the Filtering Database window 3-16  
opening the Hub View 2-1  
Oper Status 2-9  
other entry status 3-17  
Out Discards 2-11  
Out Errors 2-12  
Out Load 2-11  
Out Non-Unicast 2-12  
log files  
saving 3-39  
LRN (Learning) 2-13  
P
Parity 2-20  
Path Cost 3-28  
M
Percentage button 3-9, 3-10  
permanent entry status 3-18, 3-21  
Physical Address 2-23  
Pie Chart tool  
MAC Address 3-6  
management entry status 3-17  
manual conventions 1-3  
Max Age 3-25  
accessing 3-33  
maximum log entries 3-38  
maximum transfer unit 3-15  
menu  
polling interval  
editing 3-40  
Polling Intervals 2-4  
polling intervals 2-15  
Port  
Bridge Port 3-5  
Device 3-5  
Menu Structure 2-7, 2-8  
Meters tool  
Changing Path Cost 3-29  
Changing Priority 3-29  
Designated 3-29  
accessing 3-33  
MIB I, II 1-2  
MIB I, II Tool 2-30  
MIBTree 1-2  
Designated Cost 3-28  
Path Cost 3-28  
Port Color Codes  
Module Index 2-5  
Module Type 2-5  
mouse, using in the Hub View 2-5  
MtuExceedDiscard 3-15  
Bridge Application Display 2-14  
Interface Application Display 2-12  
Port Display Form 2-5, 2-9, 2-16  
Port Display Form Options  
Bridge 2-13  
Interface 2-9  
Port Index 2-5  
Port Operational State 2-16  
Port Security utility 2-25  
Port Status 2-5  
N
NetBIOS Broadcast Reduction 2-22  
NetBIOS MAC addresses 2-23  
NetBIOS name 2-24  
Index-3  
 
Index  
PortCircuit 3-14  
Priority 2-22, 3-25  
Priority (Port) 3-27  
Spanning Tree Explorer (STE) packet 3-2, 3-3  
Spanning Tree Explorer (STE) Span Mode  
3-30, 3-32  
Spanning Tree Port Table 3-28  
accessing 3-27  
Spanning Tree Port Table button 3-26  
Spanning Tree Protocol window 3-23  
accessing 3-23  
Q
Quit button 2-5  
bridge 3-7  
Speed 2-10, 2-20  
spmarun script 3-4  
R
Receive Port 3-18  
Remain—In box 3-37  
Re-sizing a window 1-3  
RIF 2-24  
SR Configuration 2-31  
Sr Frames Forwarded 2-14  
stand-alone mode 1-2, 2-4  
static entry 3-15  
Root  
Statistics 2-10, 2-16  
Cost 3-25  
Clearing 2-14  
Stop Bits 2-20  
Subnet Mask 2-22  
system date  
Forward Delay 3-26  
Hello Time 3-26  
Max Age 3-26  
Port 3-25  
Root Bridge  
selection process 3-23  
Root bridge 3-23  
Routing Information Field (RIF) 3-2  
and hop count 3-31  
routing information indicator (RII) bit 3-3  
viewing and changing 2-24  
System Group window 2-30  
System Information utility 2-24  
system time  
viewing and changing 2-24  
T
Target Segment Number 3-31  
Technical Support 1-6  
Topology Change flag 3-24  
Tp Frames Filtered 2-14  
Tp Frames Forwarded 2-13  
translational bridge 3-3  
Transparent button 3-10  
Trap IP 2-19  
TSX-1620 firmware revision  
viewing 2-24  
TSX-1620 Hub View 2-3  
tsxmod 2-1  
S
Save As Defaults 2-16  
screen displays 1-3  
self entry status 3-17  
Send Mail 3-36  
serial port 2-19  
set bridge port thresholds 3-35  
SNMP MIB2 System Group window 2-30  
Software Revision 2-25  
Source Address 3-17  
Source Address List  
port 2-31  
Type 2-10  
Source Route mode 3-16  
Source Routing 3-2  
Source Routing button 3-10  
Source Routing Configuration  
port 2-30  
Source Routing Configuration window 2-31  
accessing 3-29  
U
UNK 2-13  
Unknown (---) 2-13  
Uptime 2-4, 3-6  
Use Defaults 2-15  
Spanning Tree 2-17, 2-22  
Spanning Tree Algorithm (STA) 3-2, 3-22  
version 3-24  
V
version numbers 1-6  
Index-4  
 
Index  
viewing and changing the system date and  
time 2-24  
Index-5  
 
Index  
Index-6  
 

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