Cabletron Systems TSX-1620 !

Using the TSX-1620 Bridge View

3-24 The Spanning Tree Protocol Window

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.)

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.

!

CAUTION

All bridges in a network must use the same Spanning Tree version. Mixing Spanning Tree

Algorithm protocols will cause an unstable network.

Contents

Main Page i Notice Virus Disclaimer ii Restricted Rights Notice (Applicable to licenses to the United States Government only.) iii Contents Chapter 2 Using the TSX-1620 Hub View Chapter 1 Introduction to SPMA for the TSX-1620 Chapter 3 Using the TSX-1620 Bridge View 1-1 Chapter 1 How to use the TSX-1620 Users Guide; manual conventions; contacting Cabletron Technical Support; Introduction to SPMA for the TSX-1620 Using the TSX-1620 Users Guide TSX-1620 rmware versions supported by SPMA Whats NOT in the TSX-1620 Users Guide. . . Conventions 1-3 Conventions Screen Displays Page Using the Mouse 1-6 Getting Help Getting Help Page Page 2-1 Chapter 2 Using the TSX-1620 Hub View Using the Hub View Navigating through the Hub View, monitoring hub performance; managing the hub Navigating Through the Hub View Hub View Front Panel 2-4 Using the Hub View Using the Mouse in the TSX-1620 Hub View Using the TSX-1620 Hub View 2-6 Using the Hub View The TSX-1620 Application Displays Page Page Monitoring Device Performance 2-9 Monitoring Device Performance Port Display Form 2-10 Monitoring Device Performance Monitoring Device Performance 2-11 2-12 Monitoring Device Performance Monitoring Device Performance 2-13 2-14 Monitoring Device Performance Clearing Statistical Information Managing the Device 2-15 Managing the Device not Setting the Polling Intervals 2-16 Managing the Device Managing the Device 2-17 Using the Bridge Cong Utility 2-18 Managing the Device Dening Community Names Managing the Device 2-19 Conguring Your TSX-1620s Serial Port 2-20 Managing the Device Managing the Device 2-21 Performing IF Conguration 2-22 Managing the Device Managing the Device 2-23 Viewing NetBios Information 2-24 Managing the Device Viewing and Changing System Information Managing the Device 2-25 Conguring Port Security 2-26 Managing the Device Managing the Device 2-27 all 2-28 Managing the Device Managing the Device 2-29 Viewing the Interface List 2-30 Managing the Device Accessing the MIB I, II Tool SPMA Tools Guide Accessing Bridge Management Performing Source Routing Conguration for a Port Managing the Device 2-31 Viewing a Bridge Ports Source Address List 2-32 Managing the Device Enabling/Disabling Bridging for TSX-1620 Ports Page Page Chapter 3 Using the TSX-1620 Bridge View Bridging Basics 3-2 Bridging Basics Transparent Bridging Source Route Bridging Accessing the Bridge Trafc View Window 3-3 Source Route Transparent Bridges Accessing the Bridge Trafc View Window 3-4 Accessing the Bridge Trafc View Window Navigating Through the Bridge Trafc View Page 3-6 Accessing the Bridge Trafc View Window Bridge Trafc View Front Panel The Bridge Port Display 3-8 Accessing the Bridge Trafc View Window Choosing Bridge Trafc Information: Bridge Trafc View Buttons Accessing the Bridge Trafc View Window 3-9 3-10 Accessing the Bridge Trafc View Window Using the Detail View Window 3-11 Using the Detail View Window The Bridge Status Window The Bridge Statistics Window 3-13 The Bridge Statistics Window Using the TSX-1620 Bridge View 3-14 The Bridge Statistics Window The Filtering Database Window 3-15 The Filtering Database Window Viewing the Filtering Database The Filtering Database Window 3-17 3-18 The Filtering Database Window The Filtering Database Window 3-19 Changing the Filtering Database Dynamic Ageing Time 3-20 The Filtering Database Window Changing Forwarding and Static Database Entries As you change the ageing time, SPMA converts seconds to days:hours:minutes:seconds. The Filtering Database Window 3-21 3-22 The Spanning Tree Protocol Window Finding a Filtering Database MAC Address The Spanning Tree Protocol Window The Spanning Tree Protocol Window 3-23 3-24 The Spanning Tree Protocol Window ! The Spanning Tree Protocol Window 3-25 3-26 The Spanning Tree Protocol Window The Spanning Tree Port Parameters Window 3-27 Changing Spanning Tree Parameters The Spanning Tree Port Parameters Window 3-28 The Spanning Tree Port Parameters Window The Source Routing Conguration Window 3-29 Changing a Ports STA Parameters The Source Routing Conguration Window 3-30 The Source Routing Conguration Window The Source Routing Conguration Window 3-31 3-32 The Source Routing Conguration Window Changing Source Routing Port Parameters Creating Bridge Trafc Charts, Graphs and Meters 3-33 Creating Bridge Trafc Charts, Graphs and Meters 3-34 Conguring Forwarding Thresholds Conguring Forwarding Thresholds Page 3-36 Conguring Forwarding Thresholds Viewing the Forwarding Log 3-37 Viewing the Forwarding Log 3-38 Viewing the Forwarding Log Changing Polling Intervals 3-39 Changing Polling Intervals Enabling and Disabling Ports 3-40 Enabling and Disabling Ports Enabling and Disabling a Transparent Bridge Port Enabling and Disabling Ports 3-41 Enabling and Disabling a Source Routing Bridge Port Page Index-1 Index A B C D E F G H I L M N O P Q R S T U