Enterasys Networks DFE-Gold Series Manual

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Configuring Spanning Tree Loop Protect Features show spantree disputedbpduthreshold

6-76 Spanning Tree Configuration

Usage

AdisputedBPDUisoneinwhichtheflagsfieldindicatesadesignatedroleandlearning,andthe

priorityvectorisworsethanthatalreadyheldbytheport.IfadisputedBPDUisreceivedtheport

isforcedtothelisteningstate.Refertothe802.1Q‐2005standard,IEEEStandard

forLocaland

MetropolitanAreaNetworks–VirtualBridgedLocalAreaNetworks,forafulldescriptionofthedispute

mechanism,whichpreventsloopingincasesofone‐waycommunication.

ThedisputedBPDUthresholdisanintegervariablethatrepresentsthenumberofdisputed

BPDUsthatmustbereceivedonagiven

port/SIDuntiladisputedBPDUtrapissentandasyslog

messageisissued.Forexample,ifthethresholdis10,thenatrapisissuedwhen10,20,30,andso

on,disputedBPDUshavebeenreceived.

Ifthevalueis0,trapsarenotsent.Thetrapindicates

port,SIDandtotalDisputedBPDUcount.

Thedefaultis0.

Example

ThisexampleshowshowtosetthedisputedBPDUthresholdvalueto5:

Matrix(rw)->set spantree disputedbpduthreshold 5

show spantree disputedbpduthreshold

UsethiscommandtodisplaythecurrentvalueofthedisputedBPDUthreshold.

Syntax

show spantree disputedbpduthreshold

Parameters

None.

Defaults

None.

Mode

Switchcommand,Read‐Only.

Example

ThisexampleshowshowtodisplaythecurrentdisputedBPDUthreshold:

Matrix(rw)->show spantree disputedbpduthreshold

Disputed BPDU threshold is set to 0

clear spantree disputedbpduthreshold

UsethiscommandtoreturnthedisputedBPDUthresholdtoitsdefaultvalueof0,meaningthat

disputedBPDUtrapsshouldnotbesent.

Syntax

clear spantree disputedbpduthreshold