ZXR102900ESeriesConīægurationGuide
lEdgeNode:Thenodeconnectswithmorethan2levelsinZESRringiscallededge
node.Theedgenodecanbetransmissionnode(contains2ports),masternode
(contains2ports)orassistantport(contains1port).
lAssistantNode:Theassistantportisalsoedgeport.Itisthetransmissionnodethat
hasonlyoneportintherelativesegment.Itmainlyassiststhemasternodetoachieve
serviceswitchingforthesegment.AsshownināZESRMulti-ringMulti-domainDesign
Figureā,majorringiscomposedofS1,S2,S3andS4.OfwhichS1ismasternode,
othersaretransmissionnode.Level1segment1iscomposedofS3,S4,S5andS6.
OfwhichS3andS4areassistantnodes,S5ismasternode,S6istransmissionnode.
Level1segment2iscomposedofS3,S4andS7.OfwhichS3andS4areassistant
nodes,S7ismasternode.
lSmart-linknode:Thesmart-linkisasimpleexpansionfortheformerZESRfunction
andrealizestheprotectionforkeyservicelink.AsshownināSMART-LINKā,when
thelinkgoeswrong,itcanswitchautomaticallyandcarryoutmalfunctionresponsein
time.
IntroductiontoZESRFunction
lSingle-RingSingle-DomainZESR
Ć ZESRDomain
ZESRdomainisanexampleofZESRprotocol.ItisinanEthernetringand
consistsofmasternode,transitnodeandcontrolVLAN.
Figure4-33ZESRrunningstatewhentheringisācompletestateā
AsshowninFigure4-33,eachnodeisZXR102900Eswitch.Allthenodesform
aring.TheMASTERswitchisthemasternode.ZESRDomainsetsacontrol
VLANcomposedofalltheportsinthering.TheprotectedVLANmustcontain
alltheaboveports.ZESRDomainsetsamasterandmultitransitnodes.Each
nodeconnectswiththeringwithtwoports:primaryportandsecondaryport.
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SJ-20120409144109-002|2012-07-02(R1.0)ZTEProprietaryandConīædential