[c-nsp] multicast source problem

[Dale W. Carder]

On May 18, 2007, at 6:10 AM, Michael Robson wrote:
> Thanks for your help, but I've just found the problem (I missed  
> this one
> earlier then I was looking around).
>
> .IGMP snooping does not constrain multicast traffic for
> multicast group addresses in the range x.128-255.x.x until a
> receiver joins the multicast group. This problem is resolved
> in Release 12.2(18)SXD5.
> (CSCeh62522)
>
> A software upgrade it is!

I think that was the bug we found too, that I mentioned:

Dale

On May 18, 2007, at 12:58 PM, Dale W. Carder wrote:
>
> Furthermore, I believe the igmp snooping/flooding behavior (without
> a querying router) changed somewhere between SXD and SXF, as I seem
> to recall we got burned by that on the last upgrade.