Enterasys Enterasys SecureStack B2 B2G124-24 Spécifications Page 268

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clear spantree spanguard
9-26 Spanning Tree Configuration
Mode
Switchcommand,readwrite.
Usage
SpanGuardisdesignedtodisable,orlockoutan“edge”portwhenanunexpectedBPDUis
received.Theportcanbeconfiguredtobereenabledafterasettimeperiod,oronlyaftermanual
intervention.
Aportcanbedefinedasanedge(user)portusingthesetspantreeadminedge
command,
describedinsetspantreeadminedgeonpage 939.Aportdesignatedasanedgeportis
expectedtobeconnectedtoaworkstationorotherendusertypeofdevice,andnottoanother
switchinthenetwork.WhenSpanGuardisenabled,ifanonloopbackBPDUis
receivedonan
edgeport,theSpanningTreestateofthatportwillbechangedto“blocking”andwillnolonger
forwardtraffic.Theportwillremaindisableduntiltheamountoftimedefinedbysetspantree
spanguardtimeout(“setspantreespanguardtimeoutonpage 927)haspassedsincethelastseen
BPDU,theportismanuallyunlocked(setorclearspantreespanguardlock,clear/setspantree
spanguardlockonpage 929),theconfigurationoftheportischangedsoitisnotlongeranedge
port,ortheSpanGuardfunctionisdisabled.
SpanGuardisenabledanddisabledonlyonaglobal
basis(acrossthestack,ifapplicable).By
default,SpanGuardisdisabledandSpanGuardtrapsareenabled.
Example
ThisexampleshowshowtoenabletheSpanGuardfunction:
B2(rw)->set spantree spanguard enable
clear spantree spanguard
UsethiscommandtoresetthestatusoftheSpanningTreeSpanGuardfunctiontodisabled.
Syntax
clear spantree spanguard
Parameters
None.
Defaults
None.
Mode
Switchcommand,readwrite.
Example
ThisexampleshowshowtoresetthestatusoftheSpanGuardfunctiontodisabled:
B2(rw)->clear spantree spanguard
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