Re: RPF Check in Multicast Routing

Hi,

 You can have a RPF failure on a router if the outgoing interface for the
unicast IPv4 route to the X, is not the same interface as the interface
through
which the router is receiving multicast traffic from X. Basically unicast
shortest
path is not matching multicast tree.

 You can then fix this issue by using a static mroute for the X network, who

specifies the right interface for RPF, the interface which is receiving
multicast traffic.

 If the router find RPF information in both the mroute table and unicast
table, it prefers
the mroute table.

Regards,
Rares

On Mon, Feb 28, 2011 at 9:58 PM, Malik Nouman Ahmad <djmalik_at_gmail.com>wrote:

> Hi,
>
> Sometimes we use static mroutes for fixing the RPF issues.
>
> What I know about RPF check in multicast is that if for a destination X,
> the
> outgoing interface for IPv4 traffic is the incoming interface for the
> multicast traffic arriving from X, then the RPF check is passed
>
> I do not understand which mroute might fix an issue. Can anybody guide me
> or refer to some article to clear this problem
>
> Thanks,
> Malik
>
>
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Received on Mon Feb 28 2011 - 22:25:45 ART