Re: IP Multicast over FR!!!

From: Yasser Aly (blackyeyes00@hotmail.com)
Date: Fri May 07 2004 - 17:30:04 GMT-3


Hi Bob,

  Would you kindly advice how to verify the following:
A) The mapping agent can receive the dense-mode traffic from the RP on group
224.0.1.39 ?
B) All routers can receive the dense-mode group 224.0.1.40 from the mapping
agent ?

I know how to config Multicast but frequently have hard time troubleshooting
it when it is not working.

Thanx for your help.
Yasser

====================
Sergio,

You can use sparse-dense mode on an NBMA network with Auto-RP, though it
does present some challenges. Generally, you will want to put the mapping
agent at the hub.

There are two basic challenges, though. You must make sure that the mapping
agent can receive the dense-mode traffic from the RP on group 224.0.1.39.
You must also make sure that all of the routers can receive the dense-mode
group 224.0.1.40 from the mapping agent.

Starting in IOS 12.2(7) the global command:

ip pim auto-rp listener

permits you to run auto-rp over interfaces that are only configured for
sparse mode. It allows only the auto-rp groups 224.0.1.39 and 224.0.1.40 to
use dense mode.

HTH,

Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net

----- Original Message -----
From: "Sergio Jimenez Arguedas" <sejimenez@its.co.cr>
To: <ccielab@groupstudy.com>
Sent: Thursday, May 06, 2004 10:05 PM
Subject: IP Multicast over FR!!!

>Hi Group,
>
>I have a doubt about Auto-RP in NBMA networks, I read it and made the LAB
>
http://www.cisco.com/univercd/cc/td/doc/cisintwk/intsolns/mcst_sol/frm_rlay.h
>tm, Also I made the LAB in Practical Studies VolumenII.(Chapter 3, pag
248).
>
>Q1: Can I use IP PIM Sparse-dense-mode in a NBMA with AUTO-RP?
>
>With static RP I don4t have problems. The URL link has SPARSE-MODE in the
NBMA
>intf, but the book has SPARSE-DENSE-MODE!!!
>
>I think I can4t use AUTO-RP without DENSE-MODE!!!
>
>
>Thanks,
>
>
>Sergio Jiminez A.
>
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