Changing Bridge Spanning Tree Parameters | Cabletron Systems 9E423

9E312/9E423 Module Bridging

Changing Bridge Spanning Tree Parameters

The Bridge Spanning Tree window allows you to update the following parameters for your 9E312/9E423 Module bridge. When you have ﬁnished making changes to the following individual parameters, you must click on

at the bottom of the Spanning Tree window to write the changes to the

device.

NOTE

Any values you set at the bridge will cause a Topology Change ﬂag to be issued in the next Conﬁguration BPDUs it transmits. This will cause the bridged network to immediately recalculate Spanning Tree and change topology accordingly.

Changing Bridge Priority

To change the part of the bridge address that contains the identiﬁer used in the Spanning Tree Algorithm for priority comparisons:

1.Highlight the Bridge Priority ﬁeld.

2.Enter the new identiﬁer, in hexadecimal format; the allowed range is 0-FFFF hexadecimal.

3.Click on .

The selected Bridge Priority will be applied to the bridge (a lower number indicates a higher priority in the root selection process).

Changing the Spanning Tree Algorithm Protocol Type

To change the type of protocol used in Spanning Tree:

1.Click the mouse on the appropriate option button: 802.1, DEC, or NONE.

2.Click on .

!

CAUTION

The selected Spanning Tree Algorithm protocol type will be applied to the bridge. If you selected None, the Spanning Tree Algorithm will be disabled (if it already was enabled). If STA Protocol Type was changed from None to IEEE 802.1 or DEC, you must restart the bridge for the newly selected STA protocol to be applied.

All bridges in a network should use the same Spanning Tree version. Mixing Spanning Tree Algorithm protocols will cause an unstable network.

Bridge Spanning Tree

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Cabletron Systems 9E423, 9E312 manual Changing Bridge Spanning Tree Parameters, Changing Bridge Priority

Contents

Page Virus Disclaimer Page Restricted Rights Notice Page Contents Index 9E312/9E423 Module Bridging Introduction Using the 9E312 and 9E423 User’s Guide Introduction Related Manuals Software Conventions Common 9E312 and 9E423 Window Fields Using Buttons and Menus Getting Help Using On-line HelpGetting Help from Cabletron Systems Technical Support 9E312 and 9E423 Firmware FTP Introduction 9E312 and 9E423 Firmware 9E312/9E423 Module View Viewing Module Information 9E312/9E423 Module View Front Panel Information Connection Status Menu Structure E312/9E423 Module View Menu Structure Device Menu Help Menu Utilities MenuBridge Menu 9E312/9E423 Module Port Status Display Bridge Port Menu Chassis Manager Window Managing the Module Setting the Device Date and TimeViewing the Device Type Edit Time Window Using the Find Source Address Feature Enabling and Disabling Bridge Ports Summary Information Find Source Address Window Interface Description Fields IndexType Description Interface Performance Statistics/Bar Graphs Raw Counts Load Interface Detail WindowRate Interface Detail Window Statistics Unicast Error MulticastDiscarded Unknown Protocol Testing and Disabling the Current Interface Packets ReceivedPackets Transmitted Making Sense of Interface Statistics Using the Applications Pull-down menu 9E312/9E423 Module View Summary Information 9E312/9E423 Module Bridging Bridging Basics An Overview of Remote Bridge Management More on Transparent Bridging Bridge Status Window Bridge Status Window Information Fields Bridge State on Interface Interface Address Interface TypeInterface Speed Enabling and Disabling Bridging Bridge Statistics Performance Graphs Errors Red Bridge Performance Graph Window FieldsFrames Forwarded Green Filtered Magenta Interface Statistics Window Conﬁguring the Bridge Performance Graphs Interface Statistics Window Fields Address Bridge Spanning Tree Non-Unicast 9E312/9E423 Module Bridging Bridge Level Fields Conﬁguring the Bridge Spanning Tree WindowBridge Priority Root Bridge Root CostRoot Port Protocol Bridge Port Level Fields Path Cost Designated CostDesignated Root Designated Bridge Changing Bridge Priority Changing Bridge Spanning Tree ParametersChanging the Spanning Tree Algorithm Protocol Type Changing Hello Time Changing Forwarding Delay TimeChanging Max Age Time Changing Port Priority Filtering DatabaseChanging Path Cost 9E312/9E423 Module Bridging Filtering Database Window Filtering Database Window Fields ListNumber Capacity Conﬁguring the Filtering Database Source PortReceive Port Port Filtering Changing the Type of Entry Altering the Ageing TimeChanging the Receive Port Changing the Port Filtering Action Adding or Deleting Individual Entries Using Port Source Addressing Clearing All Permanent, Static, or Dynamic Entries Setting the Ageing Time Device Ageing Time Window Duplex Modes Duplex Modes Window Interface Duplex Modes Window FieldsFull Duplex Setting the Duplex Mode Index Index-2