Join-group over static-oif

Routing & Switching Multicast
2

Hello Warren

Just a clarification here. The command ip igmp static-oif is a command found on Nexus devices. The corresponding command on IOS devices is ip igmp static-group.

Now what’s the difference?

  • ip igmp join-group will cause the interface to actively join a multicast group as a member. That means that the IP address of the interface itself is a receiver of that multicast traffic. The result is an entry in the multicast routing table. The interface is also able to ping the multicast group it has joined.
  • ip igmp static-oif (or ip igmp static-group in IOS) will cause the interface to enable hardware switching (or fast switching) of that specific group’s traffic without joining the multicast group itself. The result is that the entry appears in the multicast routing table as before, however, you will be unable to ping the multicast group from that interface, since it is not a member.

I hope this has been helpful!

Laz