[c-nsp] C7304 and OSPF

[Jan Friedel]

  Hi,

  two possible hints (?)

    - packetloss issue (check `ping <neighbor> size <interface IP mtu>`
      repeat ..`)
    - IP MTU issue (check `debug ip ospf ..` and check all IP mtu
      settings on all interfaces in subnet; sure, they all have to be
      the same)

--
jf


On Fri, Mar 24, 2006 at 07:56:21AM +0200, Palis Michalis wrote:
> From: "Palis Michalis" <security at cytanet.com.cy>
> To: <cisco-nsp at puck.nether.net>
> Date: Fri, 24 Mar 2006 07:56:21 +0200
> X-Mailer: Microsoft Outlook Express 6.00.2900.2180
> Subject: [c-nsp] C7304 and OSPF
> 
> Hello all
> 
> We have a few Cisco7304 and despite all other problems we are facing with PXF, we are having problems with unstable ospf. We are having two of them in a an enviroment where we have several C7401 , C7609 and C7513. The ospf of 7340 whith the other routers is very untable while the OPSF between all the other router in the network is OK. All routers are in the same area. C7304 have two Interfaces,one GE and one FE. Problem is on the GE side. GE has about 45Megs of traffic. IOS that we are currently running is :c7300-js-mz.122-20.S8.bin. We did try several IOS for the C7304 but all are having their unique problems.
> 
> >From debuging it seems that the C7304 is not processing the OSPF hellos it receives from the neighbor. The remote neighbor stays in the INIT state. The strange thing is that it does not loose all its neighbors at the same time.. It may loose some of them and after a while some other at random...
> 
> 
> Mar 24 05:26:13 EET: %OSPF-5-ADJCHG: Process 1, Nbr x.x.x.141 on GigabitEthernet0/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired
> Mar 24 05:33:13 EET: %OSPF-5-ADJCHG: Process 1, Nbr x.x.x.151 on GigabitEthernet0/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired
> Mar 24 05:51:13 EET: %OSPF-5-ADJCHG: Process 1, Nbr x.x.x.129 on GigabitEthernet0/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired
> Mar 24 05:57:13 EET: %OSPF-5-ADJCHG: Process 1, Nbr x.x.x.140 on GigabitEthernet0/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired
> Mar 24 05:59:33 EET: %OSPF-5-ADJCHG: Process 1, Nbr x.x.x.136 on GigabitEthernet0/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired
> Mar 24 06:23:53 EET: %OSPF-5-ADJCHG: Process 1, x.x.x.142 on GigabitEthernet0/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired
> Mar 24 06:25:33 EET: %OSPF-5-ADJCHG: Process 1, Nbr x.x.x.7 on GigabitEthernet0/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired
> Mar 24 06:26:48 EET: %OSPF-5-ADJCHG: Process 1, Nbr x.x.x.158 on GigabitEthernet0/0 from FULL to DOWN, Neighbor Down: Dead timer expired
> Mar 24 06:27:53 EET: %OSPF-5-ADJCHG: Process 1, Nbr x.x.x.140 on GigabitEthernet0/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired
> 
> Ay idea?
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