Chapter7ServiceConguration
FIGURE56NONLEVEL0SEGMENTLINK
FIGURE57SMART-LINK
TheFunctionof
MasterNodeon
PrimaryRing
OnemasternodeexistsonprimaryringofoneZESRdomain.As
showninFigure55,suchasmasternodeS1isboththeinitiator
ofdetectionofringnetworkstateandthedecision-makerforop-
erationaftertopologychangingofprimaryring.
TheFunctionof
TransitNode
Transitnodeisusedtomonitorthestateofdirect-connectZESR
linkandnotifythelinkchangetomasternode,whowillmake
decisionforprocessing.
TheFunctionof
AssistantNode
Assistantnodeisalsothebordernode,andtransitnodewithonly
oneportoncorrespondingsegmentlink.Itismainlyusedtomon-
itorthestateofdirect-connectZESR,notifythelinkchangeto
masternodeandmeanwhilemonitorthestateofmasternodeon
segmentlink.
TheFunctionof
Multi-Domain
Multipledomainsaresupportedononesegmentoflink,realizing
trafcsharing.
CondentialandProprietaryInformationofZTECORPORATION107