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Руководство пользователя. Версия 2.0 Страница: 248

D-Link DWS-4026 Руководство пользователя. Версия 2.0 онлайн [248/741] 172936

ConfiguringSpanningTreeProtocol

D-Link UnifiedWiredandWirelessAccessSystem

November2011 Page248

D‐LinkUWSUserManual

Table135:SpanningTreeMSTPortConfiguration/StatusFields

Field Description

MSTID SelectanexistingMSTinstancefromdrop‐downlisttodisplayorconfigureits

values.

Interface Selectaphysicalorportchannelinterfacetoconfigure.Theportisassociated

withtheVLAN(s)associatedwiththeMST.

PortPriority ThepriorityforaparticularportwithintheMST.Theportpriorityisse

tin

multiplesof16.Ifyouspecifyavaluethatisnotamultipleof16,thepriority

issettothepriorityisautomaticallysettothenextlowestprioritythatisa

multipleof16.Forexample,ifyousetavaluebetween0and15,thepriority

isse

tto0.Ifyouspecifyanumberbetween16and31,thepriorityissetto16.

PortPathCost SetthePathCosttoanewvalueforthespecifiedportintheselectedMST

instance.Ittakesavalueintherangeof1to200000000.

Auto‐calculatePo

rtPathCost Displayswhetherthepathcostisautomaticallycalculated(Enabled)ornot

(Disabled).Pathcostiscalculatedbasedonthelinkspeedoftheportifthe

configuredvalueforPortPathCostiszero.

PortID TheportidentifierforthespecifiedportwithintheCST.Itismadeupfr

omthe

portpriorityandtheinterfacenumberoftheport.

PortUpTimeSinceCounters

LastCleared

Timesincethecounterswerelastcleared, displayedinDays,Hours,Minutes,

andSeconds.

PortMode ShowswhetherSTPisenabledontheport.ToenableSTPonaport,usethe

System>Po

rt>Configurationpage.

PortForwardingState IndicatesthecurrentSTPstateofaport.Ifenabled,theportstatedetermines

whatforwardingactionistakenontraffic.Possibleportstatesare:

• Disabled:STPiscurrentlydisabledontheport.Theportforwardstraffic

whilelearningMACaddresses.

• Blocking:Theportiscu

rrentlyblockedandcannotbeusedtoforward

trafficorlearnMACaddresses.

• Listening:Theportiscurrentlyinthelisteningmode.Theportcannot

forwardtrafficnorcanitlearnMACaddresses.

• Learning:Theportiscurrentlyinthelearningmode.Theportcannot

forwardtraffic,however,itca

nlearnnewMACaddresses.

• Forwarding:Theportiscurrentlyintheforwardingmode.Theportcan

forwardtrafficandlearnnewMACaddresses

PortRole EachMSTBridgePortthatisenabledisassignedaPortRoleforeachspanning

tree.Theportrolewillbeoneofthefollowingvalues:Ro

otPort,Designated

Port,AlternatePort,BackupPort,MasterPortorDisabledPort.

DesignatedRoot RootBridgefortheselectedMSTinstance.Itismadeupusingthebridge

priorityandthebaseMACaddressofthebridge.

DesignatedCost DisplayscostoftheportparticipatingintheSTPtopology.Portswithalow

er

costarelesslikelytobeblockedifSTPdetectsloops.

DesignatedBridge BridgeIdentifierofthebridgewiththeDesignatedPort.Itismadeupusingthe

bridgepriorityandthebaseMACaddressofthebridge.

DesignatedPort PortIdentifierontheDesignatedBridgethatoffersthelowestcosttotheLAN.

Itisma

deupfromtheportpriorityandtheinterfacenumberoftheport.

D-Link DWS-4026 Руководство пользователя. Версия 2.0 онлайн [248/741] 172936

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