[c-nsp] C7301 dropping OSPF

[Mike Louis]

Have you ever seen it with overlapping multicast addressing?

-----Original Message-----
From: Rodney Dunn <rodunn at cisco.com>
Sent: Friday, April 24, 2009 1:36 PM
To: Bill Blackford <BBlackford at nwresd.k12.or.us>
Cc: cisco-nsp at puck.nether.net <cisco-nsp at puck.nether.net>
Subject: Re: [c-nsp] C7301 dropping OSPF


Turn on log adjacency detail under OSPF and correlate it.

Almost always a result of packet loss with the peers.

Rodney

On Fri, Apr 24, 2009 at 10:09:56AM -0700, Bill Blackford wrote:
> PROBLEM:
> 7301 dropping OSPF adjacencies. The log is showing the following messages:
>
> Apr 23 12:20:01 c7301 392: 000398: Apr 23 12:20:00.016 PDT: %OSPF-5-ADJCHG: Process 5794, Nbr x.x.x.x on GigabitEthernet0/0 from LOADING to FULL, Loading Done
> Apr 23 12:20:01 c7301 393: 000399: Apr 23 12:20:00.016 PDT: %OSPF-5-ADJCHG: Process 5794, Nbr x.x.x.x on GigabitEthernet0/1 from LOADING to FULL, Loading Done
>
>
> During this, all traffic moves over to my other router. BGP peers stay up, but IGP routes get dumped.
> The router sees about 200M and 30k PPS on each interface at peak times.
> CPU gets to about 55% at peak. This issue is occurring near, but not always at peak.
> Code is older, disk0:c7301-js-mz.123-14.T3.bin. But this issue just started showing up. It has me a bit concerned as we just had a series of power events with a misbehaved UPS.
>
>
> I can ping the multicast address fine:
> wsc-rtr-7301#ping 224.0.0.5
>
> Type escape sequence to abort.
> Sending 1, 100-byte ICMP Echos to 224.0.0.5, timeout is 2 seconds:
>
> Reply to request 0 from lo.bdr1.fqdn (x.x.x.x), 1 ms Reply to request 0 from ge-1-0-6.agr1.fqdn (x.x.x.x), 4 ms Reply to request 0 from ge-0-2-v100.bdr1.fqdn (x.x.x.x), 1 ms
>
> wsc-rtr-7301#sh ip os n
>
> Neighbor ID     Pri   State           Dead Time   Address         Interface
> x.x.x.x           255   FULL/DR         00:00:06    x.x.x.x    GigabitEthernet0/0
> y.y.y.y         25    FULL/BDR        00:00:07    x.x.x.x    GigabitEthernet0/1
>
> The interfaces includes the following:
>
> int gi0/0
> ip ospf hello-interval 2
> ip ospf priority 25
> ip ospf retransmit-interval 1
>
>
>
> int gi0/1
> ip ospf hello-interval 2
> ip ospf priority 30
> ip ospf retransmit-interval 1
>
>
> Thank you in advance for any help.
>
> -b
>
> --
> Bill Blackford
> Senior Network Engineer
> NWRESD
>
> my /home away from home
>
>
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