All things related to multicast

[Toerless Eckert <>]

On Thu, Aug 16, 2001 at 11:45:09PM -0400, Michael H. Lambert wrote:
> Any suggestions as to what the following might mean (Cisco 7507 w/IOS 
> 12.1(5)T9)?  The immediate upstream router is a Juniper, but RPF checks 
> done by hand look correct.

"show ip rpf" in Cisco IOS shows you the RPF check applied to multicast
packets received by a router. That's not the same as the MSDP RPF check,
and no, there's no "show ip mdsp rpf" *sigh*.

What the debug below shows is that you got the SA from 192.88.115.101
(should be the juniper, right ?) for RP 144.228.240.249. The RPF
failure indicates that the best route in the MBGP routing table for the
RP address 144.228.240.249 is this router (0.0.0.0) itself.

What's you MSDP/MBGP topology ? Are the RP and juniper part of your AS ?

Cheers

        Toerless

> Thanks,
> 
> Michael
> 
> Aug 16 14:52:08.541 EDT: MSDP: 192.88.115.101: Received 44-byte msg 2743222 
> from peer
> Aug 16 14:52:08.541 EDT: MSDP: 192.88.115.101: SA TLV, len: 44, ec: 3, RP: 
> 144.228.240.249
> Aug 16 14:52:08.541 EDT: MSDP: 192.88.115.101: Peer RPF check failed for 
> 144.228.240.249, used IMBGP route's peer 0.0.0.0
> 
> +-----------------------------------------------------------------------+
> | Michael H. Lambert, Network Engineer           Phone: +1 412 268-4960 |
> | Pittsburgh Supercomputing Center               FAX:   +1 412 268-8200 |
> | 4400 Fifth Avenue, Pittsburgh, PA  15213       
> 
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