Bidirectional PIM not working

I apologize for any duplicates of this email, but I stopped receiving
emails from this mailer list, so in case my previous email didn't make
it I am resending. The problem description is in the original email
below.

Thanks for your help!

---------- Forwarded message ----------
From: Jorge Cortes <jorge.cortes.cano_at_gmail.com>
Date: Sun, Dec 20, 2009 at 10:22 PM
Subject: Bidirectional PIM not working
To: Cisco certification <ccielab_at_groupstudy.com>

Hi Team,

I have the following topology:

228.1.1.1|===R1===R5===SW2===SW4===|228.1.1.1

I'm using PIM SM and BSR and R5 is the RP for all MCAST groups (only
group 228.1.1.1 is defined however)
Before enabling BiDir PIM when I ping 228.1.1.1 from any of the
devices shown above I get replies from both R1 and SW4, so there are
no RPF failures and everything is working as expected. Now I enable
BiDir across the network, including RP, and after that whenever I ping
228.1.1.1 from either R1 or R5 I only get a reply from R1, but not
from SW4, however when I ping 228.1.1.1 from SW2 or SW4 I still get
replies back from both R1 and SW4. I also noticed that just after
enabling BiDir I got the following message from R5:

*Dec 21 04:12:54.903: %PIM-6-INVALID_RP_JOIN: Received (*, 228.1.1.1)
Join from 155.1.58.8 for invalid RP 150.1.5.5

155.1.58.8 is the IP Add of SW2 on the link between SW2 and R5

I deleted group 228.1.1.1 from R1 and when I ping the group from R1 or
R5 I don't get any replies, but when pinging from SW2 or SW4 I still
get the reply from SW4. If I disable BiDir everything works fine
again. The output of show ip mroute on R1 and R5 is the following:

R1:

(*, 228.1.1.1), 00:00:13/00:02:53, RP 150.1.5.5, flags: BCL
 Bidir-Upstream: Serial0/0/0.1, RPF nbr 155.1.0.5
 Outgoing interface list:
   FastEthernet0/0, Forward/Sparse, 00:00:13/00:02:46
   Serial0/0/0.1, 228.1.1.1, Bidir-Upstream/Sparse, 00:00:13/00:00:00

R5:

(*, 228.1.1.1), 00:27:01/00:03:15, RP 150.1.5.5, flags: B
 Bidir-Upstream: Null, RPF nbr 0.0.0.0
 Outgoing interface list:
   Serial0/0/0, 155.1.0.1, Forward/Sparse, 00:01:25/00:03:02
   FastEthernet0/0, Forward/Sparse, 00:26:57/00:03:15

I really appreciate if someone could provide some help here.

Thanks!

Jorge

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Received on Mon Dec 21 2009 - 12:43:39 ART