Zte ZXR10 5900E Series - UDLD Configuration

Chapter4IS-ISConguration
Route-leaking
Attatchbit:TheRFC1195denesthatifanL1/L2routerinanareaisconnectedwitha
routerinanotherarea,theL1/L2routersetstheATTbitinitsL1LSPtoinformtheL1
routerinthisareathatthereisanegress.theL1routerinthisareaselectsthenearestL2
onwhichtheATTbitissetastheegressofthearea,andthenadefaultrouteisgenerated.
TheL1routerselectsthenearestL1/L2routerastheegressofthisarea,butthenearest
routeisnotnecessarilytheoptimumroute,thesecondoptimumroutemaybeused.
Therefore,theRFC2966denedtheroute-leaking.Toavoidtheuseofsecondoptimum
route,theroutinginformationinthebackboneareaisleakedtotheLevel–1area.Using
thismethod,thecommonareasalsohavetheroutinginformationoftheentireIS-ISroute
domain.
Fortheroute-leakingoperation,seeFigure4-8.
Figure4-8Route-leaking
4.2ConguringtheIS-ISProtocol
TheIS-IScongurationdescribedinthissectionisbasedonIProuting.Ifnoinstanceor
interfaceisspeciedinthefollowingcongurations,theprocessIDisassumedtobe0and
VLAN100isusedastheinterface.
EnablingtheIS-ISProtocol
ToenabletheIS-ISprotocolontheZXR105900E,performthefollowingsteps:
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SJ-20150114102049-003|2015-01-15(R1.0)ZTEProprietaryandCondential