PROTOCOL INDEPENDENT MULTICAST SPARSE MODE (PIM-SM) SUPPORT FOR DATA CENTER INTERCONNECT

摘要

Techniques are described for utilizing Protocol Independent Multicast Sparse Mode (PIM-SM) to transport BUM (broadcast, unknown unicast, and multicast) traffic in a Virtual Extensible LAN (VXLAN) underlay of a data center, where the BUM traffic is received on active-active, multi-homed Ethernet virtual private network (EVPN) interconnects between multiple physical data centers. For example, the techniques may readily be applied to support usage of PIM-SM where provider edge (PE) routers of the EVPN operate as gateways between the EVPN and the VXLAN spanning the data center interconnect.

主权项

1. A method comprising:
establishing an Ethernet virtual private network (EVPN) data center interconnect (DCI) between a first data center running a virtual extensible local area network (VXLAN) and a second data center, wherein the VXLAN of the first data center is active-active multi-homed to two or more provider edge (PE) routers of the EVPN and includes VXLAN tunnels established using protocol independent multicast-sparse mode (PIM-SM); receiving, with one of the two or more multi-homed PE routers from the EVPN, BUM (broadcast, unknown unicast, and multicast) traffic, wherein the one of the two or more multi-homed PE routers is not a designated forwarder (DF); and forwarding the BUM traffic from the one of the two or more multi-homed PE routers into the VXLAN toward the first data center according to EVPN BUM forwarding rules installed on the PE routers.