Zte ZXR10 2900 Series - ZESR Related Concepts

Chapter7ServiceConguration
thanSTPprotocolandthetopologyconvergencespeedismore
fast.
ZESRRelatedConcepts
1.ZESRRing
AZESRringphysicallycorrespondstoanEthernetringtopol-
ogy.AZESRareaconsistsofmultipleZESRrings.Oneringis
themajor-level,othersarethesegmentlinkingwiththema-
jor-level.IfthereisonlyoneringinZESRarea,thenitisthe
main-level.
2.ZESRControlVLAN
EachZESRareahasacontrolVLAN.TheZESRprotocolmes-
sageistransmittedinthecontrolVLAN.
3.ZESRProtectedVLAN
EachZESRareahasmultipleprotectVLANs.Theusers’service
istransmittedintheprotectVLAN.Realizetheservicetrafc
protectioninlayer-2bythelinkswitchofZESRProtectedVlan.
4.MasterNode
Masternodeistheprimarycontrolnode.Theprimaryringand
thesegmentofeachlevelhaveanoderespectively(Itcanbe
combinedtoone,masteredge-port).Ittakeschargeinthe
controloftheprimaryringandthesegmentofeachlevel.
5.TransmissionNode
ThenodesexceptthemasternodeinZESRringaretransmis-
sionnode.Itmainlyassiststhemastertodoloopinspection
andserviceswitching.
6.EdgeNode
Thenodeconnectswithmorethan2levelsinZESRringis
callededgenode.Theedgenodecanbetransmissionnode
(contains2ports),masternode(contains2ports)orassistant
port(contains1port).
7.AssistantNode
Theassistantportisalsoedgeport.Itisthetransmission
nodethathasonlyoneportintherelativesegment.Itmainly
assiststhemasternodetoachieveserviceswitchingforthe
segment.Asshownin“ZESRMulti-ringMulti-domainDesign
Figure”,majorringiscomposedofS1,S2,S3andS4.Of
whichS1ismasternode,othersaretransmissionnode.Level1
segment1iscomposedofS3,S4,S5andS6.OfwhichS3and
S4areassistantnodes,S5ismasternode,S6istransmission
node.Level1segment2iscomposedofS3,S4andS7.Of
whichS3andS4areassistantnodes,S7ismasternode.
8.Smart-linknode
Thesmart-linkisasimpleexpansionfortheformerZESRfunc-
tionandrealizestheprotectionforkeyservicelink.Asshown
in“SMART-LINK”,whenthelinkgoeswrong,itcanswitchau-
tomaticallyandcarryoutmalfunctionresponseintime.
CondentialandProprietaryInformationofZTECORPORATION103