In this implementation, IPv6 multicast works on
VRs. By default, IPv6 multicast is disabled on a VR. To enable IPv6
multicast on a VR, access the context for a VR, and then issue the ipv6 multicast-routing command.
ipv6
multicast-routing
Use to enable IPv6 multicast routing on the VR.
By default, IPv6 multicast is disabled on the VR. In the
disabled state, all multicast protocols are disabled, and the VR forwards
no multicast packets.
Example
host1(config)#ipv6 multicast-routing
Use the no version to disable
IPv6 multicast routing on the VR (the default).