Cabletron Systems 9A128-01 manual Conﬁguring the Bridge Spanning Tree Window, Bridge Priority

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Bridging

Figure 5-9. 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 selected 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.

The Bridge Spanning Tree window provides the following bridge-level information:

Bridge Priority

This ﬁeld displays the “priority” component of the 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 default value is 8000.

Bridge Spanning Tree

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Contents Cabletron Systems Virus Disclaimer Page Restricted Rights Notice Page Contents Index Chapter Fddi ManagementChapter Bridging Using This Guide IntroductionRelated Reading Software Conventions Common Window FieldsDevice Name IP AddressUsing Buttons Using On-line HelpGetting Help LocationGetting Help from the Cabletron Systems Global Call Center FTPFirmware Versions Supported 9A128-01 Module View Viewing Module Information Front Panel InformationBoot Prom Connection StatusUpTime Port StatusDate Menu StructureTime A128-01 Module View Menu Structure Device MenuPort Status Menu Fddi Menu Utilities MenuHelp Menu Board MenusPort Status Displays Port MenusSelecting a Port Status View Bridge Port Status DisplaysBridge Port State Bridge MappingBridge Port Status Color Codes Fddi Port Status DisplaysConnection State LER EstimateChassis Manager Window Fddi Port Status Color CodesModule Type Viewing Hardware TypesDevice Type Viewing I/F Summary Information Module Type WindowIndex DescriptionSta Interface Performance Statistics/Bar GraphsRaw Counts LoadRate Interface Statistics WindowError AddressUnicast Non-UnicastUsing the Find Source Address Feature Packets Received Received onlyTransmit Queue Size Transmit only Packets Transmitted Transmit onlySetting the Device Date and Time Managing the HubEnabling and Disabling Ports Bridge PortsModule Ports Accessing the ATM Connections Window ATM ConﬁgurationATM Conﬁguration Connection DataSettings VPIConﬁguring Connections Adding a New ConnectionDeleting a Connection ATM Conﬁguration Conﬁguring Connections Fddi Management Conﬁguration Fddi ManagementMAC State Neg. Negotiated SMT VersionReq. Requested Target Token Rotation Time Concentrator M Ports Concentrator Non-M PortsNumber of MACs MAC PathConnection Policy 15 32,768 a permanently set value for this bit Number of Nodes Address ModeStation List Stations Panel Node ClassTopology Upstream NeighborPerformance Frame Errors Transmit FramesReceive Frames Lost FramesFddi Management Performance Bridging Bridge Status Window BridgingUp Time Bridge State on InterfaceInterface Type Bridge AddressConﬁguring Duplex Modes Enabling and Disabling Bridging Bridge Statistics Performance GraphsForwarded Green Total Errors Red Filtered MagentaXmitted Blue Conﬁguring the Bridge Performance GraphsErrors ForwardedFiltered XmittedForwarded from Interface Statistics WindowForwarded to Description Using Source Addressing Setting the Ageing Time Port Source Addresses WindowBridge Spanning Tree Conﬁguring the Bridge Spanning Tree Window Bridge PriorityRoot Bridge Root CostRoot Port ProtocolForwarding Delay Hello TimeMax Age Hold TimeChanging Bridge Spanning Tree Parameters Changing Hello Time Changing Bridge PriorityChanging the Spanning Tree Algorithm Protocol Type Changing Port Priority Changing Forwarding Delay TimeChanging Max Age Time Filtering Database Changing Path CostBridging Bridging List NumberCapacity Ageing TimePort Filtering Conﬁguring the Filtering DatabaseReceive Port Altering the Ageing Time Changing the Type of EntryChanging the Receive Port Changing the Port Filtering ActionClearing All Permanent, Static, or Dynamic Entries Bridging Filtering Database Index Index-2 Index-3 Index Index-4