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S-PMSI tunnel: selective ( not supported, switch over the traffic based on threshold )
9 Support for Multicast
https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-01#page-19
Ingress Replication Tunnels in Multicast VPN
With Ingress Replication (IR), BUM traffic ingress access side is replicated to remote VTEP as unicast ( not PIM in the core )
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