From: srdja blagojevic (srdja1@pexim.co.yu)
Date: Thu Jun 22 2006 - 15:43:58 ART
Sami,
AFAIK on this address (224.0.1.40) Mapping Agents anounce RP-to-group
mappings. Every Sparse mode router is member of this group (CL flags in your
sh ip mr output). C-RPs anounce their wish to be RP on 224.0.1.39.
HTH,
srdja
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Sami
Sent: Thursday, June 22, 2006 16:11
To: Cisco certification
Subject: PIM Sparse mode
Group,
I was under impression 224.0.1.40 is used to listen Auto-RP annoncement. I
just enabled sparse mode and configured static RP on all the routers.
When I use show ip mroute it shows *,G entry for *,224.0.1.40 ? Why is this
entry ?
R4#show ip mr
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry,
X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
U - URD, I - Received Source Specific Host Report,
Z - Multicast Tunnel, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group Outgoing
interface flags: H - Hardware switched, A - Assert winner
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 224.0.1.40), 00:09:58/00:03:21, RP 150.1.4.4, flags: SJCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/1/0, Forward/Sparse, 00:03:05/00:03:21
Serial0/0/0, Forward/Sparse, 00:09:58/00:02:46
Thanks
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