Does VRF keep multicast traffic with the VRF?

[rwills]

I am working on a multi-tenant environment.  Smaller clients have dedicated VLAN's.  Larger clients have their own VRF's with multiple VLAN's.  One tenant wants to enable multicast for their VRF.  I am unsure if the VRF will recognize a packet with a multicast address as belonging to a specific VRF, and prevent the multicast traffic from crossing over into other clients.  Obviously we need to be 100% sure to avoid that kind of crossover. 

[Jeroen Huysmans · Accepted solution]

Multicast is IP traffic...

Just like any other IP traffic (unicast, broadcast, ...) it will be isolated in the VRF unless you start playing with import/export.

In order for multicast to work in an MPLS cloud you'll need msdp to propagate the multicast trees through all neighbors which provide routing for that specific vrf.

regards,

Jeroen