From: Chris Broadway (midatlanticnet@gmail.com)
Date: Sat Sep 16 2006 - 08:45:39 ART
r1 has ip multicast-routing eabled, ip pim sparse mode on its serial
(frame) and lo 0 interfaces, igmp join for 224.1.1.1 and 224.2.2.2 on lo 0,
and autorp listener. r2 has ip multicast routing enabled, IP sparse mode on
its serial (frame) and ethernet interfaces, and autorp listener. R3 has ip
multicast routing enabled, ip pim sparse mode on its ethernet, and auto rp
listener. r5 has ip multicast routing enabled, ip pim sparse on s0/2 and lo
0, ip nbma mode on ser 0/2, send rp address source lo 0 scope 16 group list
95, send red discovery scope 16, and autorp listener. It is quicker for me
to just write out the configs.
-Broadway
On 9/15/06, Victor Cappuccio <cvictor@protokolgroup.com> wrote:
>
> Hi Broadway
>
> Have you enabled ip pim nbma in R5 Ip pim sparse interface?
> Mind to show us your config?
>
> Thanks
> Victor.-
>
> -----Mensaje original-----
> De: nobody@groupstudy.com [mailto:nobody@groupstudy.com] En nombre de
> midatlanticnet@gmail.com
> Enviado el: Viernes, 15 de Septiembre de 2006 11:10 p.m.
> Para: ccielab@groupstudy.com
> Asunto: multicast mroute issue
>
> Group,
>
> Here is a multicast issue I am having. I cannot figure out what is
> causeing
> this behavior and therefore cannot figure out how to fix it. Here is the
> topology:
>
> R5 (Frame hub and Multicast RP)
> / \
> frame/ \frame
> / \
> R1 R2---ETH----R3
>
>
> R5 is the RP for group 224.1.1.1 and 224.2.2.2. I have R5 configure for
> the
> mapping agent also. PIM Sparse mode only is used on the appropriate
> interfaces of all routers. I am using AutoRP on all routers. Lo0 on r1 is
> configured with the igmp join command. I can ping 224.1.1.1 and 224.2.2.2
> from all routers.
>
> Now here is the issue:
> When I ping 224.1.1.1 or 224.2.2.2 from r2, I see the (S,G) in the mroute
> table of r5 as (1.1.125.2, 224.1.1.1) and the outbound interface as serial
> 0/2. When I ping 224.1.1.1 from r3, I see the (S,G) in the mroute table
> of
> r5 as (1.1.62.8, 224.1.1.1) and the outbound interface as serial 0/2.
>
> But, even though I can ping from r2 or r3...i can never ping at the same
> time. When I send 500 pings from r2 to 224.1.1.1 first, I see pings from
> r3
> with an outbound interface as null on r5. If I stop the pings from r2, I
> will see the outbound interface for the pings from r3 change to serial
> 0/2.
> If I start the pings from r2 back up, the outbound interface on r5 for
> that
> new ping will be null.
>
> Why is this happening and how do I fix it?
>
> -Broadway
>
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