Presentation on theme: "EVC structure for a Protected E-Line service"— Presentation transcript:
1 EVC structure for a Protected E-Line service Maarten Vissers
2 IntroductionThe following slides illustrate the structure of an EVC which is set up to support a protected E-Line service inOne Carrier network (X)Two Carrier networks (X,Y)Each Carrier network includes access, metro and core domainsEVC is set up with Dual Node Interconnections between domains and between Carrier NetworksBetween access/metro and metro/core domains two nodes are used to interconnectBetween carrier X/carrier Y networks four nodes are used to interconnectEVC is not loop free and it is required to block forwarding of VLAN frames on the alternative pathsThis is normal behavior within protected P2P connections
3 EVC set up in Carrier X Network AccessMetro(EVC ring)Core(full mesh ofvirtual links)Metro(partial mesh ofvirtual links)Access13579UNIUNIAB246810EVC Terminating or Bridging NodeEthernet physical linkEthernet virtual linkEVC set up in Carrier X NetworkDNI Protected P2P EVCVLAN frame in EVC13579UNIUNIABblock forwarding of frames in EVC246810Dual-node-interconnect protected P2P EVC in Carrier X network
4 1 3 5 Carrier X Network A 2 4 6 11 12 13 14 7 9 Carrier Y Network B 8 AccessMetro(EVC ring)Core(full mesh)135UNICarrier X NetworkA2461112E-NNI1314Core(full mesh)Metro(partial mesh)Access79UNICarrier Y NetworkB810EVC Terminating or Bridging NodeEthernet physical linkEthernet virtual link
5 EVC set up in Carrier X and Y Networks 135VLAN frame in EVCUNICarrier X NetworkAblock forwarding of frames in EVC246DNI Protected P2P EVC1112E-NNI131479UNICarrier Y NetworkB810Dual-node-interconnect protected P2P EVC in Carrier X and Y networks
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