From: Alex De Gruiter \(AU\) (Alex.deGruiter@didata.com.au)
Date: Wed Jul 19 2006 - 19:21:42 ART
Ah ha! That was indeed the problem! I was running 12.2.25SEB2 - upgraded
the IOS and voila, it worked a charm. Thanks for your help on this.
As annoying as it was at the time, it really forced me to go back and
validate my understanding of auto-rp. I wonder if Cisco introduces
little anomalies like this as part of their commitment to "on-going
education" :) It certainly helped me!
Thanks to Brant for the answer. You're a life saver.
Cheers,
Alex
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Brant I. Stevens
Sent: Thursday, 20 July 2006 6:38 AM
To: Alex De Gruiter (AU); ccielab@groupstudy.com
Subject: Re: Auto-RP messages not received
What version of code are you running on the 3750. I opened up a TAC
case on
a very similar issue last year, requiring 12.2.25SEC (IIRC).
On 7/18/06 10:18 PM, "Alex De Gruiter (AU)"
<Alex.deGruiter@didata.com.au>
wrote:
> Hi,
>
> I am having an issue with PIM Auto-RP in the lab that I can't solve,
> that hopefully someone will be able to shed some light on.
>
> I have a 2600 router connected to a 3750 switch. The relevant
> configuration follows. The problem is that the 3750 switch will not
> install an RP for any multicast groups. When I replace the 3750 switch
> with a router (3800 series, 2600), the RP's are installed as you
> expected.
>
> What I find particularly unusual is that "debug ip pim autorp" on the
> 3750 doesn't indicate any messages, although I can see the RP-Announce
> and RP-Discovery packets being built by the 2600 router:
>
> *Mar 5 20:00:50.448: Auto-RP(0): Build RP-Announce for 172.16.2.1,
> PIMv2/v1, ttl 31, ht 181
> *Mar 5 20:00:50.448: Auto-RP(0): Build announce entry for
> (224.0.0.0/4)
> *Mar 5 20:00:50.448: Auto-RP(0): Send RP-Announce packet on
> FastEthernet0/0
> *Mar 5 20:00:50.448: Auto-RP: Send RP-Announce packet on Loopback0
> *Mar 5 20:00:50.448: Auto-RP(0): Received RP-announce, from
172.16.2.1,
> RP_cnt 1, ht 181
> *Mar 5 20:00:50.448: Auto-RP(0): Added with (224.0.0.0/4,
> RP:172.16.2.1), PIMv2 v1
> *Mar 5 20:00:50.448: Auto-RP(0): Build RP-Discovery packet
> *Mar 5 20:00:50.448: Auto-RP: Build mapping (224.0.0.0/4,
> RP:172.16.2.1), PIMv2 v1,
> *Mar 5 20:00:50.452: Auto-RP: Build mapping (224.9.9.9/32,
> RP:172.16.2.1), PIMv2 v1.
> *Mar 5 20:00:50.452: Auto-RP: Build mapping (224.9.9.10/32,
> RP:172.16.2.1), PIMv2 v1.
> *Mar 5 20:00:50.452: Auto-RP: Build mapping (224.9.9.11/32,
> RP:172.16.2.1), PIMv2 v1.
> *Mar 5 20:00:50.452: Auto-RP(0): Send RP-discovery packet on
> FastEthernet0/0 (1 RP entries)
> *Mar 5 20:00:50.452: Auto-RP: Send RP-discovery packet on Loopback0
(1
> RP entries)
>
> Has anyone seen this before? I know the 3750s aren't part of the lab
> exam, however they're what I have available as part of my studies, so
> I'd like to know if there is something I am doing wrong.
>
> Configuration follows -->
>
> 2600_Router#
>
> !
> ip multicast-routing
> ip pim send-rp-announce Loopback0 scope 31
> ip pim send-rp-discovery Loopback0 scope 31
> !
> interface FastEthernet0/0
> ip address 192.168.2.2 255.255.255.0
> ip pim sparse-dense-mode
> !
> interface Loopback0
> ip address 172.16.2.1 255.255.255.0
> ip pim sparse-dense-mode
> ip igmp join-group 224.9.9.9
> ip igmp join-group 224.9.9.10
> ip igmp join-group 224.9.9.11
> !
> router rip
> version 2
> network 10.0.0.0
> network 172.16.0
>
> 2600_Router#show ip pim rp
> Group: 224.9.9.9, RP: 172.16.2.1, v2, v1, next RP-reachable in
00:00:51
> Group: 224.9.9.10, RP: 172.16.2.1, v2, v1, next RP-reachable in
00:00:51
> Group: 224.9.9.11, RP: 172.16.2.1, v2, v1, next RP-reachable in
00:00:51
>
> 3750_Switch#
>
> !
> ip multicast-routing distributed
> !
> interface Loopback0
> ip address 10.0.0.1 255.255.255.0
> ip pim sparse-dense-mode
> ip igmp join-group 224.9.9.11
> !
> interface FastEthernet1/0/48
> no switchport
> ip address 192.168.2.3 255.255.255.0
> ip pim sparse-dense-mode
> spanning-tree portfast
> !
> router rip
> version 2
> network 10.0.0.0
> network 192.168.2.0
>
> 3750_Switch#show ip pim rp
>
>
>
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This archive was generated by hypermail 2.1.4 : Tue Aug 01 2006 - 07:13:48 ART