Bridge Level Fields, Bridge Priority | Cabletron Systems 9E423

9E312/9E423 Module Bridging

Figure 3-4. Bridge Spanning Tree Window

Conﬁguring the Bridge Spanning Tree Window

The Bridge Spanning Tree window displays STA parameters and allows you to alter parameters for the 9E312/9E423 Module bridge as a whole, and for each individual bridging interface.

The currently selected bridging interface is highlighted in the lower right quadrant of the window. To alter the parameters of another interface, click on the appropriate Port X name listed in the quadrant.

Bridge Level Fields

Bridge Priority

This ﬁeld displays the “priority” component of the 9E312/9E423 Module’s unique bridge identiﬁer. The Spanning Tree Algorithm assigns each bridge a unique identiﬁer, which is derived from the bridge’s MAC address and the Priority. 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.

You can edit this text box to change network topology, if needed. The range is 0-FFFF hexadecimal; the default value is 8000 hexadecimal.

Bridge Spanning Tree

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Cabletron Systems 9E423, 9E312 manual Conﬁguring the Bridge Spanning Tree Window, Bridge Level Fields, 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 Using On-line Help Getting 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 Utilities Menu Help MenuBridge Menu 9E312/9E423 Module Port Status Display Bridge Port Menu Chassis Manager Window Setting the Device Date and Time Managing the ModuleViewing 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 Interface Detail Window LoadRate 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 Type Interface AddressInterface 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 Conﬁguring the Bridge Spanning Tree Window Bridge Level FieldsBridge Priority Root Bridge Root CostRoot Port Protocol Bridge Port Level Fields Path Cost Designated CostDesignated Root Designated Bridge Changing Bridge Spanning Tree Parameters Changing Bridge PriorityChanging the Spanning Tree Algorithm Protocol Type Changing Forwarding Delay Time Changing Hello TimeChanging Max Age Time Filtering Database Changing Port PriorityChanging Path Cost 9E312/9E423 Module Bridging Filtering Database Window Filtering Database Window Fields ListNumber Capacity Conﬁguring the Filtering Database Source PortReceive Port Port Filtering Altering the Ageing Time Changing the Type of EntryChanging 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 Duplex Modes Window Fields InterfaceFull Duplex Setting the Duplex Mode Index Index-2