From: srdja blagojevic (srdja1@pexim.co.yu)
Date: Wed Jun 14 2006 - 14:29:17 ART
Aamir,
from what you said, it seems that is something wrong with your shared tree.
You should check sh ip mroute (for your group 228.28.28.28) on router who
have igmp join group command, and find out if the output seems ok (i.e. is
input interface as expected (toward RP), is OIList as expected (interface
that have igmp join group command)). If everything is as you expected, then
you should go to its upstream neighbor and find out if his sh ip mroute is
as expected (and so on till you reach RP)). At first hop that you notice
some unexspected behavior try to find out what is wrong with debug commands
(usually debug ip pim and debug ip mrout should be enough).
I this doesn't help, post your multicast config and sh ip mroute from your's
routers so maybe we can try to understand what is wrong with this setup.
hth,
srdja
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Aamir Aziz
Sent: Wednesday, June 14, 2006 18:54
To: Bob Sinclair
Cc: ccielab@groupstudy.com
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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