From: Bob Sinclair (bsinclair@netmasterclass.net)
Date: Wed Jun 14 2006 - 14:11:15 ART
Aamir,
I am not familiar with that particular lab, but, in general, if the downstream
router B knows the RP address, and his path to that RP is through the router A
in question, and that router B has a downstream client, then that router B
should send a join, and the interface that received the join on router A
should be on the OILIST.
I would try some debugs to figure out if the downstream router is sending
joins upstream. For example: debug ip pim 228.28.28.28 or debug ip igmp.
I would suspect no downstream client. How are you simulating the client? If
it is ip igmp join-group on a loopback, make sure you have PIM on that
loopback.
Bob Sinclair
CCIE #10427, CCSI 30427
www.netmasterclass.net
----- Original Message -----
From: Aamir Aziz
To: Bob Sinclair
Cc: ccielab@groupstudy.com
Sent: Wednesday, June 14, 2006 12:54 PM
Subject: Re: Multicast question
hi there
i am basically doing IE vol1 lab 2 task, the interfaces are configured as
Sparse mode with ip pim rp address command so when i do the show ip pim rp
mapping, it shows me RP mapping meaning it can reach RP so what to do,
which
command to give on this router to check this problem?
thanks
Aamir
On 6/14/06, Bob Sinclair <bsinclair@netmasterclass.net> wrote:
>
> Hi Aamir,
>
> If your outgoing interface list is null, then I would first ask whether
> the group is being destributed in Dense Mode or in Sparse Mode. You can
> easily tell by looking for the D or S flag on the the of the first line
of
> the (*,G) entry.
>
> If you are doing Dense Mode and the OILIST is null, then that means you
> have no PIM neighbors and you have no connected clients. Check your
> configuration: for example, show ip pim neighbors.
>
> If you are doing Sparse Mode and your OILIST is null, then it means you
> have not recieved an IGMP or PIM join on any interface. Check that
> downstream routers have clients and know how to reach the RP.
>
> HTH,
>
> Bob Sinclair
> CCIE #10427, CCSI 30427
> www.netmasterclass.net
>
>
> ----- Original Message -----
> *From:* Aamir Aziz <aamiraz77@gmail.com>
> *To:* ccielab@groupstudy.com
> *Sent:* Wednesday, June 14, 2006 12:12 PM
> *Subject:* Multicast question
>
>
> Hi guys
>
> i have a question, lets say i configure multicast on couple of routers
and
> at the far end router i give the igrp group 228.28.28.28 command and do a
> ping from other router and it doesnt ping and on this router where i do
> ping
> i do show ip mroute and outgoing interface of 228.28.28.28 is null, what
> is
> the first thing to check??
>
> thanks
> Aamir
>
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