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Chapter6STPConguration
ConfiguringSTP
Enabling/DisablingSTP
CommandFunction
ZXR10(config)#spanning-tree{enable|disable}ThisenablesordisablesSTP .
Note:
DisableSTPonZXR105900/5200,allportsthatphysicalstatusis
uparesetForwardingstatus.Indefault,STPisdisabled.
ConfiguringSTPMode
CommandFunction
ZXR10(config)#spanning-treemode{sstp|rstp|mstp}
ThisconguresSTPmode.
Bydefault,STPmodeofZXR105900/5200isMSTP .Whichever
modeisselected,itcanbefullycompatibleandinteroperablewith
othertwomodes.
ConfiguringSTPParameters
TheparametersofSTPprotocolisasfollow:
max-age
IntheCSTstructure,latestBPDUpacketsaretransferredfrom
theRootswitchtotheleaveswitchalongtheCSTstructure.
Themessage-agevalueoftheBPDUpacketsentbytheRoot
switchis0andincreasesby1aftereachmiddleswitch.The
max-agevaluedoesnotchangeatall.Whenthemessage-age
valueofaBPDUpacketisgreaterthanthemax-agevalue,this
BPDUpacketisinvalid.
hello-time
ItistocontroltheintervalforsendingBPDUpacket.
forward-delay
Incaseofnon-statefasttransition,itdecidesthedelay(2x
forward-delay)oftheportfromBlockingtoForwarding.
max-hops
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