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

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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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Contents Page Virus Disclaimer Page Restricted Rights Notice Page Contents Index 9E312/9E423 Module BridgingIntroduction Using the 9E312 and 9E423 User’s Guide IntroductionRelated Manuals Software Conventions Common 9E312 and 9E423 Window FieldsUsing Buttons and Menus Getting Help Using On-line HelpGetting Help from Cabletron Systems Technical Support 9E312 and 9E423 Firmware FTPIntroduction 9E312 and 9E423 Firmware 9E312/9E423 Module View Viewing Module Information 9E312/9E423 Module ViewFront Panel Information Connection StatusMenu Structure E312/9E423 Module View Menu Structure Device MenuHelp Menu Utilities MenuBridge Menu 9E312/9E423 Module Port Status Display Bridge Port MenuChassis 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 PortsSummary Information Find Source Address WindowInterface Description Fields IndexType DescriptionInterface Performance Statistics/Bar Graphs Raw CountsLoad Interface Detail WindowRate Interface Detail Window Statistics UnicastError MulticastDiscarded Unknown ProtocolTesting and Disabling the Current Interface Packets ReceivedPackets Transmitted Making Sense of Interface StatisticsUsing the Applications Pull-down menu 9E312/9E423 Module View Summary Information 9E312/9E423 Module Bridging Bridging BasicsAn Overview of Remote Bridge Management More on Transparent BridgingBridge Status Window Bridge Status Window Information Fields Bridge State on InterfaceInterface Address Interface TypeInterface Speed Enabling and Disabling Bridging Bridge StatisticsPerformance Graphs Errors Red Bridge Performance Graph Window FieldsFrames Forwarded Green Filtered MagentaInterface Statistics Window Conﬁguring the Bridge Performance GraphsInterface Statistics Window Fields AddressBridge Spanning Tree Non-Unicast9E312/9E423 Module Bridging Bridge Level Fields Conﬁguring the Bridge Spanning Tree WindowBridge Priority Root Bridge Root CostRoot Port ProtocolBridge Port Level Fields Path Cost Designated CostDesignated Root Designated BridgeChanging 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 CapacityConﬁguring the Filtering Database Source PortReceive Port Port FilteringChanging the Type of Entry Altering the Ageing TimeChanging the Receive Port Changing the Port Filtering Action Adding or Deleting Individual EntriesUsing Port Source Addressing Clearing All Permanent, Static, or Dynamic EntriesSetting the Ageing Time Device Ageing Time WindowDuplex Modes Duplex Modes WindowInterface Duplex Modes Window FieldsFull Duplex Setting the Duplex Mode Index Index-2