Enterasys-networks D-Series Manual de usuario Pagina 244

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clear spantree spanguard
8-26 Spanning Tree Configuration
Mode
Switchcommand,readwrite.
Usage
SpanGuardisdesignedtodisable,orlockoutan“edge”portwhenanunexpectedBPDUis
received.Theportcanbeconfiguredtobereenabledafterasettimeperiod,oronlyaftermanual
intervention.
Aportcanbedefinedasanedge(user)portusingthesetspantreeadminedge
command,
describedinsetspantreeadminedgeonpage 839.Aportdesignatedasanedgeportis
expectedtobeconnectedtoaworkstationorotherendusertypeofdevice,andnottoanother
switchinthenetwork.WhenSpanguardisenabled,ifanonloopbackBPDUis
receivedonan
edgeport,theSpanningTreestateofthatportwillbechangedto“blocking”andwillnolonger
forwardtraffic.Theportwillremaindisableduntiltheamountoftimedefinedbysetspantree
spanguardtimeout(“setspantreespanguardtimeoutonpage 827)haspassedsincethelastseen
BPDU,theportismanuallyunlocked(setorclearspantreespanguardlock,clear/setspantree
spanguardlockonpage 829),theconfigurationoftheportischangedsoitisnotlongeranedge
port,ortheSpanGuardfunctionisdisabled.
SpanGuardisenabledanddisabledonlyonaglobal
basis.Bydefault,SpanGuardisdisabledand
SpanGuardtrapsareenabled.
Example
ThisexampleshowshowtoenabletheSpanGuard function:
D2(rw)->set spantree spanguard enable
clear spantree spanguard
UsethiscommandtoresetthestatusoftheSpanningTreeSpanGuardfunctiontodisabled.
Syntax
clear spantree spanguard
Parameters
None.
Defaults
None.
Mode
Switchcommand,readwrite.
Example
ThisexampleshowshowtoresetthestatusoftheSpanGuardfunctiontodisabled:
D2(rw)->clear spantree spanguard
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