Re: RPF Check in Multicast Routing

hi,
imagine a circular R1------R2----R3----R1 . server is behind R2 but u dint
enable pim between R1 and R2

the is most optimal way for R1 to receive traffic is from R2 directly but
R1 will now receive traffic form R3 .

this will fail Rpf check

as unicast route to server is through link connecting R2 .

so u need to give static mroute saying " its ok to receive traffic from R3
over non-rfp interface"

ip mroute <server ip > <mask > <R3connected interface>

hope it helps

On Mon, Feb 28, 2011 at 10:58 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 - 23:15:30 ART