OSPF issues on Ethernet Interfaces

Hi All,

I have recently migrated from two Cisco4700's to two Cisco 2821's. The new router is not able to form an OSPF network adjacency. The two main differences from the old routers to the new ones is:

1).Instead of V.35 WAN connections,FE connections. 2).The other difference is that I have a 16port FE switch module.

The error I am getting is that the OSPF process cannot form an adjacency. I ran a debug and it appeared that I was having an MTU issue, so I applied the ip ospf mtu-ignore statement which didn't resolve the issue.

Here is the output form the debug:

Aug 10 05:13:20.916: IP: s=10.2.195.2 (Vlan6), d=224.0.0.5, len 80, rcvd 0all Aug 10 05:13:22.084: IP: s=10.2.172.81 (local), d=224.0.0.5 (GigabitEthernet0/0), len 80, sending broad/multicast Aug 10 05:13:22.160: IP: s=10.2.172.82 (GigabitEthernet0/0), d=224.0.0.5, len 80, rcvd 0 Aug 10 05:13:22.944: IP: s=10.2.195.1 (local), d=224.0.0.5 (Vlan6), len

80, sending broad/multicast Aug 10 05:13:22.944: IP: s=10.2.195.2 (Vlan6), d=10.2.195.1, len 64, rcvd 0 Aug 10 05:13:22.944: OSPF: Rcv DBD from 10.2.171.22 on Vlan6 seq 0x193 opt 0x52 flag 0x7 len 32 mtu 1500 state EXCHANGE Aug 10 05:13:22.944: OSPF: Send DBD to 10.2.171.22 on Vlan6 seq 0x193 opt 0x52 flag 0x2 len 112 Aug 10 05:13:22.944: IP: s=10.2.195.1 (local), d=10.2.195.2 (Vlan6), len 144, sending

Aug 10 07:09:57.580: OSPF: Cannot see ourself in hello from 10.2.171.22 on Vlan6, state INIT Aug 10 07:09:57.584: OSPF: Neighbor change Event on interface Vlan6 Aug 10 07:09:57.584: OSPF: DR/BDR election on Vlan6 Aug 10 07:09:57.584: OSPF: Elect BDR 10.2.171.21 Aug 10 07:09:57.584: OSPF: Elect DR 10.2.171.21 Aug 10 07:09:57.584: OSPF: Elect BDR 0.0.0.0 Aug 10 07:09:57.584: OSPF: Elect DR 10.2.171.21 Aug 10 07:09:57.584: DR: 10.2.171.21 (Id) BDR: none Aug 10 07:09:57.584: OSPF: Reset Vlan6 flush timer Aug 10 07:09:57.584: OSPF: Remember old DR 10.2.171.22 (id) Aug 10 07:09:58.084: OSPF: No full nbrs to build Net Lsa for interface Vlan6 Aug 10 07:09:58.084: OSPF: Reset old DR on Vlan6

Any tips or suggestions would be greatly appreciated.

Thanks.

Jack.