Zte ZXR10 5250 Series - Page 182

ZXR105250SeriesCongurationGuide
onlyinonedirectionorthelinkisaself-loop),theportisshutdown.Itisnecessaryto
usetheresetorrecoverycommandtorecoverthecommunicationabilityoftheport.
UDLDshutsdownaportinthefollowingsituations.
lInbothmodes,whenanEchomessageissent,thedevicedetectsthattheneighbor
ofthepeerportisnotthedeviceitselfduringthenalneighbordetection.
lInaggressivemode,thestatusbecomesPROBEbecausethelastneighborisaged,
andmultipleProbemessagesaresentcontinuouslywithoutanyresponse.
lInaggressivemode,theportreceivestheUDLDmessagesentbyitselfandthereis
aself-loop.
Topreventaneighborfrombeingagedbymistake,alocaldevicesendsFlushmessages
onitsowninitiativetotheportonwhichtheUDLDfunctionisenabledinthefollowing
situations.
lTheportisdownadministratively.
lUDLDisdownontheport.
lThedeviceisrestarted.
ConguringUDLD
TheUDLDcongurationincludesthefollowingcommands:
CommandFunction
zte(cfg)#udldport<portlist>{enable|disable}EnablesordisablesUDLDona
port.
zte(cfg)#udldport<portlist>mode{aggressive|normal}SetsthemodeofaportinUDLD.
zte(cfg)#udldport<portlist>messagetimer<7-90>Setstheintervalofsending
messagesafterUDLDentersthe
BiDirectionalstatusandtheportis
steady.
zte(cfg)#udldport<portlist>recovery{enable|disable}EnablesordisablestheUDLD
recoveryfunction.
zte(cfg)#udldport<portlist>recoverytimer<10-600>Setstherecoveryinterval.
zte(cfg)#udldport<portlist>resetRecoversthelinkestablishment
functiononaportmanually.
zte(cfg)#udld<portlist>force-check{enable|disable}Enablesordisablestheforced
monologuedetectionfunction.
zte(cfg)#udld<portlist>force-checktimer<15-300>Setstheforcedmonologue
detectionperiod.
showudld(allcongurationmodes)DisplaysUDLDcongurationon
allports.
showudldport[<portlist>](allcongurationmodes)Displaysportconguration,status
anddetailedneighborinformation.
5-134
SJ-20131111172707-002|2013-11-27(R1.0)ZTEProprietaryandCondential