From: Narbik Kocharians (narbikk@gmail.com)
Date: Thu Sep 13 2007 - 11:35:59 ART
Remember when a multicast router receives a multicast flow it will perform
an RPF check.
On 9/13/07, Ben <bmunyao@gmail.com> wrote:
>
> 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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-- Narbik Kocharians CCIE# 12410 (R&S, SP, Security) CCSI# 30832 www.Net-WorkBooks.com
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