“ASR 9K + NX7K†DCI Solution Overview MC-LAG + vPC - Cisco ...
“ASR 9K + NX7K†DCI Solution Overview MC-LAG + vPC - Cisco ...
“ASR 9K + NX7K†DCI Solution Overview MC-LAG + vPC - Cisco ...
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EVPN – The PrincipleActive-active <strong>MC</strong>-<strong>LAG</strong>, perflowload balancingFrom PE1iBGP L3-NLRI:• next-hop: PE1• iBGP L2-NLRI• next-hop: PE1• C-MAC1PE1PE2Control plane:BGP for MAC distributionData plane:MPLS forwarding like L3PE3PE4PEC-MAC3From PE3iBGP L3-NLRI:• next-hop: PE3• iBGP L2-NLRI• next-hop: PE3• • Treat MAC as routable addresses and distribute them in BGP• Receiving PE injects these MAC addresses into forwarding table along with itsassociated adjacency like IP prefix• When multiple PE nodes advertise the same MAC, then multiple adjacency iscreated for that MAC address in the forwarding table: multi-paths• When forwarding traffic for a given unicast MAC DA, a hashing algorithm based onL2/L3/L4 hdr is used to pick one of the adjacencies for forwarding: per-flow loadbalancing
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