[Xorp-users] Endless PIMv2 Register messages

[Williams, Mark]

There should only be one RP for any particular group. Try going to your other Xorp systems (192.168.20.2 and 192.168.20.3) and removing the cand-rp section of the config. Also, keep the cand-bsr section, but only one router should have the cand-bsr-by-vif-name entry. 

-Mark Williams

________________________________________
From: xorp-users-bounces at xorp.org [xorp-users-bounces at xorp.org] on behalf of Jeff Mitchell [jmitchell at ll.mit.edu]
Sent: Monday, June 28, 2010 1:09 PM
To: Garry Peirce
Cc: xorp-users at xorp.org
Subject: Re: [Xorp-users] Endless PIMv2 Register messages

On 06/28/2010 04:06 PM, Garry Peirce wrote:
> Jeff,
> It wouldn't be the host doing this, but the DR router (in this case the XORP
> router), encapsulating the packets (within PIM control msgs) towards what it
> believes is the RP for this group.

Ah, thanks for the clarification.

> Who does XORP think the RP for 234.5.6.8 is?
> What do 'show pim neighbors' and 'show pim rps' and 'show pim mrib' look
> like?

Here are the results of running those commands from 192.168.20.1.

show pim neighbors:

rtrs                  1 192.168.20.2    2 Sparse      105      86
rtrs                  1 192.168.20.3    2 Sparse      105      93

(rtrs is the interface; those are the correct IPs for the two other XORP
boxes)

show pim rps:

RP              Type      Pri Holdtime Timeout ActiveGroups GroupPrefix

192.168.20.3    bootstrap   1      150     139            0 224.0.0.0/4

192.168.20.1    bootstrap   1      150     139            0 224.0.0.0/4

192.168.20.2    bootstrap   1      150     139            0 224.0.0.0/4

DestPrefix         NextHopRouter   VifName VifIndex MetricPref Metric
192.168.20.0/24    192.168.20.1    rtrs    1                 0      0
192.168.51.0/24    192.168.51.254  eth0.501 0                 0      0
192.168.52.0/24    192.168.20.2    rtrs    1                 1      1
192.168.53.0/24    192.168.20.3    rtrs    1                 1      1

Those look fine to me.

FWIW, I'm running Ben Greear's xorp.ct repo (a bit old by now, as it's
been moved to GitHub) version 7e89cbe2b0e97d2f76f78b9da7fe590543a91764,
from May 9th.

--Jeff

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