In this implementation, IP multicast works on virtual
routers (VRs). By default, IP multicast is disabled on a VR. To enable
IP multicast on a VR, access the context for a VR, and then issue
the ip multicast-routing command.
ip
multicast-routing
Use to enable IP multicast routing on the VR.
By default, IP 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)#ip multicast-routing
Use the no version to disable
IP multicast routing on the VR (the default).
