RE: Multicast Issue!

Thanks!

Date: Thu, 16 Apr 2009 22:08:02 -0600
Subject: Re: Multicast Issue!
From: bbartik_at_ipexpert.com
To: ccie1q2008_at_hotmail.com
CC: ccielab_at_groupstudy.com

Mike,

The router will not send a multicast packet out of the same interface on which
it was received. If you use sparse-mode you can use pim nbma-mode which allows
the outgoing interface list to be populated by neighbor. You can also use p2p
subinterfaces or some type of tunneling. Also, remember static mroutes will
not populate the OIL, they only help in RPF checks.

Bryan Bartik
CCIE #23707, CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com

On Thu, Apr 16, 2009 at 9:43 PM, mike jones <ccie1q2008_at_hotmail.com> wrote:

Group,

      I have the following lab layer out:

Major network 157.1.0.0

                 R1 (hub)

         123.1 / \

                / \

               / \

          .2 / FR \ .3 FastE

            R2 R3---------R5

                        .35.3 .35.5

I am using Phy. interfaces on the Fr connection (I'm sending traffic for the

spokes out the same dlci as for the HUB.)

Ex. of R2 configure:

frame-relay map ip 157.1.123.1 201 bro

frame-relay map ip 157.1.123.3 201

EIGRP is the IGP, and I have Split-horizon disabled on R1. I'm also running

Dense mode on the the links, and i joined R5 to group 224.25.25.25.

So fairly sample set up, but I can't ping 224.25.25.25 from R2. And debug on

R1 with ping from R2 shows:

 s=157.1.123.2 d=224.25.25.25, mroute olist null

I know the above debug outout mean that the packet is begin drop due to no

outgoing interface was founded. I tried added static mroutes, but that did

not work. I got it to work when I configred R1 with two sub-p-to-p

interfaces, but why is it not working with Phy interfaces on R1.

Thanks!

Mike
Received on Fri Apr 17 2009 - 00:10:56 ART