All things related to multicast

[Zenon Mousmoulas <>]

On 19/09/2012 9:27 π.μ., Hank Nussbacher wrote:
> > >Not sure about JunOS, but I believe this should do the trick for Cisco
> > >IOS:
> > >
> > >ip access-list standard SAP-mcast-group
> > >  permit host 224.2.127.254
> > >  deny any any
> > >exit
> > >
> > >interface X/Y.Z
> > >  ip multicast rate-limit in group-list SAP-mcast-group 1000
> > >exit
> > >
> > >This should be applied at (interfaces facing) the edges of your
> > >multicast network. It effectively means that any sources the router
> > >sees with a rate exceeding 1000 kbps, it will not forward downstream.
> Sorry for digging up old emails (4 years later) but due to the latest SAP
> storm I just went and tried to check
>     ip multicast rate-limit in group-list SAP-mcast-group 1000
> on 12.2(33)SRE6 and got:
> This command is no longer supported

I think "ip multicast rate-limit" has been obsolete for quite some time 
now; if I remember correctly it was also not supported in many large 
platforms.

You could use a standard rate limit but ideally you would only apply 
rate limiting proactively in such cases. A JunOS recipe for something 
along this line had been posted quite some time ago.

Regards,
Z.