[j-nsp] Re: Multicast

Daniel Roesen dr at cluenet.de
Sat Jul 16 07:06:53 EDT 2005


On Fri, Jul 15, 2005 at 04:47:19PM -1000, Antonio Querubin wrote:
> For one, the unicast route may not be the same as the multicast route. 

Yep, but not on the DR.

> Ie. the unicast and multicast topologies may be quite different.  Also, in 
> general you work backwards following the reverse path when tracing 
> multicast packet flow since the packets generally are forwarded using an 
> RPF algorithm rather by a normal unicast route lookup.

When looking for the upstream RPF interface, towards the source. But in
this case the intention was to look for the downstream interface towards
the receiver.

Please see my other self-response. I had a typo in what I wrote
(source<->receiver).


Best regards,
Daniel

-- 
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