Conﬁguring Spanning Tree | Cabletron Systems 2.2 specification

Bridging

Conﬁguring Spanning Tree

The Bridge Spanning Tree window allows you to update the following parameters for your device bridge. When you have Þnished making changes to the following individual parameters, you must click on Set 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 ßag to be issued in the next ConÞguration 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 identiÞer 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 Set.

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

!

CAUTION

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 Set.

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 must use the same Spanning Tree version. Mixing Spanning Tree Algorithm protocols will cause an unstable network.

Spanning Tree

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Cabletron Systems 2.2 manual Conﬁguring Spanning Tree, Changing Bridge Priority

Contents

Bridge/Router Interface Brim User’s Guide Page Virus Disclaimer Restricted Rights Notice Contents Contents Chapter WAN Applications Chapter Fddi ApplicationsChapter ATM Conﬁguration Index Contents Introduction BRIM-E100 Using the Brim User’s Guide Brim Management Applications Related Manuals Software Conventions Using the Mouse Left Mouse Button Right Mouse Button Device Name Common Device Window FieldsIP Address Location Using Window Buttons Using On-line Help Accessing On-line DocumentationGetting Help Hours a day, 365 days a year Getting Help from the Cabletron Systems Global Call Center Introduction Getting Help About Transparent Bridging Bridging Basics Bridging About Source Route Bridging About Source Route-Transparent Bridges About Source Route-Translational Bridges Viewing and Managing Bridging Interfaces Bridging Bridge Status Window Up Time Bridge Status Window Bridge State on Interface Accessing Bridge Status Window OptionsInterface Type Bridge Address Bridging Bridging Bridging Bridging Enabling and Disabling All Installed Interfaces Enabling and Disabling BridgingEnabling and Disabling Individual Interfaces Performance Graphs Bridge Statistics Bridging Frames Forwarded Green Errors RedFiltered Magenta Xmitted Blue Bridge Detail Breakdown Frames Forwarded ErrorsFiltered Xmitted Interface Statistics Forwarded toForwarded from Description AddressType Unicast ErrorNon-Unicast Discarded Csmacd Statistics Receive Errors Transmission Errors PPP Link Statistics Collision Errors Errors Statistics Dot5 Errors Burst Errors Line Errors Congestion Errors Internal ErrorsToken Errors Soft Errors Source Route Statistics Received Frames Discards Transmitted Frames Spanning Tree Bridge Priority Bridge Level Root Cost Root BridgeRoot Port Protocol Bridge Port Level Designated Cost Path CostDesignated Root Designated Bridge Conﬁguring Spanning Tree 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 Bridging 11. The Filtering Database Window Number ListCapacity Aging Time Conﬁguring the Filtering Database Port FilteringAltering the Aging Time Changing the Receive Port Changing the Type of EntryChanging the Port Filtering Action Adding or Deleting Individual Entries Clearing All Permanent, Static, or Dynamic Entries Special Filter Databases Ethernet and Token Ring Special Filter Database Windows Enable Special Filter Database WindowFile Source Address Destination AddressData Type Data Offset Deﬁning and Editing Filters in the Special Database Setting the Port Filtering Action Changing the Receive PortsChanging the Port Filtering Action Enabling and Disabling a Filter Saving a Set of Filters to a FileClearing the Port Filtering Action Interface Conﬁguration Bridge Methods TransparentSource Routing NetBIOS Setting the Bridge MethodProtocol Transmission Methods Source Route Transparent 16. Source Route ConÞguration Window Source Route Conﬁguration Source Route Conﬁguration Source Routing Information Subnet Mask Target Segment Local SegmentHop Count Limit Spanning Tree Expl Bridge Number Spanning Tree Mode Making and Setting Changes Using the Find Source Address Feature Using the Port Source Addresses Window Setting the Aging Time Using the Token Ring Bridge and Port Conﬁguration Windows Bridging Ring Number Virtual Ring Number Novell Translation Port ModeRing Speed Bridge Mode/Explorer Type Source Route/STE Duplex Modes Duplex Modes Window InterfaceFull Duplex Ethernet Port Conﬁguration Setting the Duplex Mode Fast Ethernet Port Conﬁguration Standard Mode Bridging Desired Operational Mode Current Operational ModePort Type Link State Setting the Operational Mode for the FE-100TX Setting the Operational Mode for the FE-100FX Sonet Port ConﬁgurationSONET/SDH Conﬁguration Sonet SONET/SDH Statistics Bridging 26. The SONET/SDH Statistics Window Errors Statistics Bridging 27. The SmartTrunk ConÞguration and Status Window Conﬁguring SmartTrunking Name PortMode SmartTrunk State Bridging Conﬁguring Broadcast Suppression Token Ring Bridge Mode Setting Token Ring Bridge Mode Setting Bridge Translation 32. Bridge Translation Window Enabling and Disabling Auto and Dual Translate Modes Conﬁguring Novell Token Ring Packet Translation Conﬁguring Token Ring Packet Translation IBM Translation Table State Index Conﬁguring Snap Translation Snap Translation Table Using the Novell Translation Window Bridging Ethernet Port Physical View Using the Physical View Windows for the Etwmim Epim Type Active Port 41. Token Ring Port Physical View Token Ring Port Physical View FNB State Ring State Active Monitor Bridging 104 Using the Physical View Windows for the Etwmim Fddi Applications Conﬁguration Window Accessing the Fddi Menu MAC State Req. Requested Target Token Rotation Time SMT VersionNeg. Negotiated Concentrator M Ports Concentrator Non-M Ports Connection Policy WindowNumber of MACs MAC Path Connection Policy Window 15 32,768 Ð a permanently set value for this bit Address Mode Station List WindowNumber of Nodes Upstream Neighbor Node Class Fddi Performance Window Transmit FramesReceive Frames Setting the Time Interval Frame ErrorsRing Ops Fddi Applications Fddi Performance Window WAN Applications Accessing the WAN Status Windows Viewing WAN Interface Status Current ActiveCurrent Primary Desired Primary Conﬁguring the Synchronous Connection Outspeed InspeedClock Source State Change WAN Port Name Conﬁguring T-1 PortsLine Type Line Coding Signal Mode Loopback ModeCircuit ID Xmt Clock Source Interface LineCoding Using the T1 FracTable Conﬁguration Window Channels Max BandwidthConﬁguring the Fractional Table Changing the Interface Line Coding Restoring a Fractional Table Compression Displaying the WAN Logical View CRC Length Changing WAN Logical Settings Viewing the WAN Port Admin/Status Synchronous Admin/StatusOperational Status Admin Status T1 Admin/StatusOper and Admin WAN Interfaces Displaying Synchronous Port Statistics Enabling and Disabling WAN T1 InterfacesFrame Check Xmit UnderRuns Total ErrorsReceive OverRuns Interrupted Frames WAN Applications Displaying Synchronous Port Statistics ATM Conﬁguration Accessing the ATM Connections Window Connection Data Settings VPI Conﬁguring Connections Adding a New Connection Deleting a Connection ATM Conﬁguration Conﬁguring Connections Index Index-2 Index-3 Index-4 Index-5 Index Index-6