From: Ben (bmunyao@gmail.com)
Date: Thu Sep 13 2007 - 04:30:45 ART
Hi Carlos,
You only need a static mroute if you get an rpf failure at a router with
multiple paths to the multicast source. The unicast and multicast paths in
such a case are not aligned, and so you can override the unicast path with
the static mroute.
For PIM-DM, you would only be interested in an mroute to the multicast
source address/subnet.
For PIM-SM, you would be interested in a static mroute to the multicast
source as well as to the RP.
HTH
Ben
On 9/13/07, Carlos Trujillo Jimenez <nergal888@hotmail.com> wrote:
>
> Hi Internetwork experts!
>
> I have the following scenario in a pim sparse ONLY network:
>
> ------------LINK A-----------------
> RouterA(R.P) ------------LINK B-----------------
> ROUTERB(M.A)
> ------------LINK B-----------------
> I have a PIM sparse only network, enabled with autorp for dynamic rp
> mapping, and all three links have full reachability by an igp.
>
> I think I should use multicast static routes but in what direction? from
> the
> R.P. to the M.A.? or frm or from the M.A towards the R.P? or both??
> Once defined, what is the best syntax to create the static mroute?
> using syntax of the next hop, or of the egress interface in the multicast
> static route:
>
> ip mroute 0.0.0.0 0.0.0.0 serial0
> ip mroute 0.0.0.0 0.0.0.0 15.15.15.1 (Next hop router)
>
> thanks.
>
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