[c-nsp] Sup2T static multicast mac address issues

[Phil Mayers]

On 09/13/2011 05:32 PM, R. Raja wrote:
> Folks,
>
> I'm migrating a working config from a sup720-10g to a sup2t, and get this
> error message when trying to configure a
> static multicast mac entry
>
> sup2t# mac address-table static 0100.5e7e.b008 vlan 5 interface
> tengigabitethernet 5/4 tengigabitethernet 6/4 disable-snooping

I'm curious why you need a static MAC entry for an IPv4-range DMAC. 
Can't you just enable IGMP snooping?

>
> IP-based forwarding is enabled, can't accept group DMAC configuration

The sup2T has, IIRC, the ability to forward multicast traffic in 
"layer2" by inspecting the IP header. This is superior to inspecting the 
DMAC, because it avoids the possibility of group MAC collisions.

Since you're using a DMAC from the IPv4 multicast range, I suspect 
you'll need to disable this.

There should be a command to disable it, but I can't remember off the 
top of my head what it is, and our devel sup2T is offline at the moment.

Hunt around in the config parser; I have a vague notion it might be 
something like:

vlan X
  no multicast ... ip-based

...or something similar.