Chapter5STPConguration
ConfiguringSTP
Enabling/DisablingSTP
CommandFunction
ZXR10(config)#spanning-tree{enable|disable}ThisenablesordisablesSTP .
Note:
DisableSTPonZXR105900E,allportsthatphysicalstatusisup
aresetForwardingstatus.Indefault,STPisdisabled.
ConfiguringSTPMode
CommandFunction
ZXR10(config)#spanning-treemode{sstp|rstp|mstp}
ThisconguresSTPmode.
Bydefault,STPmodeofZXR105900EisMSTP .Whichevermode
isselected,itcanbefullycompatibleandinteroperablewithother
twomodes.
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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