All things related to multicast

[Zenon Mousmoulas <>]

On 11 Ιουν 2008, at 10:32 ΜΜ, Niels den Otter wrote:

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> Hello Pekka,
>
> Pekka Savola wrote:
> > We've for years now installed policers in our upstream/peering
> > interfaces which rate-limit SAP to 1 mbit/s.  That has saved our  
> > and our
> > customers' backsides a couple of times already -- without crippling  
> > the
> > real use of SAP.
>
> Would you happen to have an example Junos configuration to do this  
> in global configuration?

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 if it's slightly off-topic.

Best regards,
Zenon Mousmoulas
GRNET