User manual

Table Of Contents
ZXR105900/5200SeriesUserManual(EthernetSwitchingVolume)
FIGURE12NEWROOTBRIDGE
InFigure12,switchDtakespartincalculatingspanningtree.If
priorityofswitchDislowerthanthatofswitchA.SwitchDis
electedtobeanewrootswitch.Aftercalculatingspanningtree,
portofswitchBwhichconnectstoswitchAisblocked.
Portrootprotectioncommandisconguredininterfacemode.It
isonlypermittedindesignatedportandisnotpermittedinroot
port.AportwhichenablesrootprotectionreceivesBPDUpackets
fromaneighborswitchandknowstheneighborswitchhassmaller
priority.PortwillenterROOT_INCONSISTENTstate.
InFigure12,portofswitchCthatisconnectedtoswitchDshould
beconguredasprotection.OncethisportreceivesaBPDUpacket
whichcontainssmallerprioritythanrootswitch,thisportwillen-
terROOT_INCONSISTENTstateandstopstransmittinganydata
packet.OnceswitchDstopssendingtheBPDUpacketwhichcon-
tainssmallerpriority.PortofswitchCwillresumetransmitting
datapacketsautomatically.
48CondentialandProprietaryInformationofZTECORPORATION