ZXR102900ESeriesConīægurationGuide
Figure4-39SMART-LINK
Ć TheFunctionofMasterNodeonPrimaryRing
OnemasternodeexistsonprimaryringofoneZESRdomain.AsshowninFigure
4-37,suchasmasternodeS1isboththeinitiatorofdetectionofringnetworkstate
andthedecision-makerforoperationaftertopologychangingofprimaryring.
Ć TheFunctionofTransitNode
Transitnodeisusedtomonitorthestateofdirect-connectZESRlinkandnotify
thelinkchangetomasternode,whowillmakedecisionforprocessing.
Ć TheFunctionofAssistantNode
Assistantnodeisalsothebordernode,andtransitnodewithonlyoneport
oncorrespondingsegmentlink.Itismainlyusedtomonitorthestateof
direct-connectZESR,notifythelinkchangetomasternodeandmeanwhile
monitorthestateofmasternodeonsegmentlink.
Ć TheFunctionofMulti-Domain
Multipledomainsaresupportedononesegmentoflink,realizingtrafīæcsharing.
lZESRT angentRing
ForthereasonthatZESRedge-nodehasheavyburden,ZESRtangentringadopts
thedesignofusingmultictrlvlanstoprotectthesamegroupofprotectedvlans.
4-98
SJ-20120409144109-002|2012-07-02(R1.0)ZTEProprietaryandConīædential