3 实现MSTP.ppt

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1、ImplementingSpanningTreeImplementingMSTPMultipleSpanningTreeProtocolInstance1mapstoVLANs1–500Instance2mapstoVLANs501–1000MSTRegionsMSTconfigurationoneachswitch:NameRevisionnumberVLANassociationtableExtendedSystemIDinBridgeIDFieldInteractingBetweenMSTRegionsand802.1DConfiguringMSTPSwitch(con

2、fig)#spanning-treemstconfigurationEntersMSTconfigurationsubmodeSwitch(config-mst)#namenameSetstheMSTregionnameSwitch(config-mst)#revisionrev_numSetstheMSTconfigurationrevisionnumberSwitch(config-mst)#instanceinstvlanrangeMapstheVLANstoanMSTinstanceSwitch(config-mst)#spanning-treemstinstance_

3、numberrootprimary

4、secondaryEstablishesprimaryandsecondaryrootsforMSTinstanceVerifyingMSTPSwitch#showspanning-treemstconfigurationName[cisco]Revision1InstanceVlansmapped-----------------------------------------------------------------------------011-409411-10----------------------------

5、---------------------------------------------------Switch#showspanning-treemstconfigurationDisplaysMSTPconfigurationinformationVerifyingMSTP(Cont.)Switch#showspanning-treemst1######MST01vlansmapped:1-10Bridgeaddress00d0.00b8.1400priority32769(32768sysid1)RootthisswitchforMST01InterfaceRo

6、leStsCostPrio.NbrStatus------------------------------------------------------------------------Fa4/4BackBLK1000240.196P2pFa4/5DesgFWD200000128.197P2pFa4/48BounFWD200000128.240P2pBound(STP)Switch#showspanning-treemstinstance_numberDisplaysconfigurationinformationforaspecificMSTPinstanceSw

7、itch#clearspanning-treedetected-protocols[interfaceinterface-id]ForcesrenegotiationwithneighboringswitchesduringmigrationprocessSummaryMSTPreducestheencumbranceofPVSTbyallowingasingleinstanceofspanningtreetorunformultipleVLANs.AnMSTregionisagroupofMSTPswitchesthatappearsasasinglevirtualbridg

8、etoadjacentCSTandMSTPregions.ExtendedsystemIDensuresthatVLANIDorMSTPinstancecanbecarriedintheBridgeIDfieldofaBPDU.AnMSTPregionrequiresanISTandanarbitrarynumberofMSTPinstancesasitconnectstoan802.1QnetworkattheMSTregionborder.MSTPisconfiguredwithauni