[f-nsp] Multicast causing high CPU

[Eric Helm]

Christian MacNevin wrote:
> Thanks a lot, it sounds like it's pretty cut and dried :)
> 
> I'm pretty sure they wouldn't want to do hardware flooding. That's
> basically putting the switch in dense mode and asking for all sorts of
> trouble unless I'm
> mistaking how you mean that.
> 
> Cisco has info in troubleshooting CPU on everything. Does Foundry's
> documentation not cover it? I must admit i found it difficult to find
> anything quickly with
> Google..
> 

FWIW,

At a previous job, we had to use static igmp groups on each multicast ve
interface to alleviate the CPU problems on the Big Iron Jetcore
platform. I believe hardware-drop was also configured under router pim
as part of that "tweak".

/Eric