From: Shanky (shankyz@gmail.com)
Date: Thu Jun 29 2006 - 12:28:07 ART
Hi,
I have not looked at the lab you are mentioning, but usually ip mroute is
used in cases where you have an RPF check failure, check your unicast
routing table, maybe the source for the group configured on R4 is reachable
via some path other than thru R3, for which multicast is not enabled, so you
need to statically configure an mroute on the R4 router to ignore the
unicast routing table and use path thru R3.
hope it helps.
Shanky
On 6/29/06, Feras Abunamous (fabunamo) <fabunamo@cisco.com> wrote:
>
> In the above section there something really odd about the solution. On
> all multicast enabled interfaces with sparse mode in the following
> setup:
>
>
>
> R1-----R3------R4 no tunnels configured all interfaces are multicast
> enabled. Why do we need an ip mroute 0.0.0.0 0.0.0.0 < ip add of R3
> int> on R4 to make it work where we have two ip igmp group configured
> one on R1 and R4. the confusing thing is the solution does not use ip
> mroute on R1 and the group configured there is working. But the group
> configured on R4 needs the mroute to work? Any ideas from any one?
>
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