cat3550 cannot establish ospf nei with router/s

From: seonghui (seonghui@vads.com)
Date: Sat Aug 16 2003 - 14:00:25 GMT-3

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Hi group,

I have been 'haunted' by this problem for the past two days. Here the
problem goes...

I have a router conneted to a Cat3550. router fa0/0 (ip address
10.10.10.1/24) is connected to port fas0/1 (vlan 10) on cat3550. I would
like cat3550 to establish ospf neighbour with the router and hence, I
created an Interface vlan 10 with ip address 10.10.10.2/24. However, the
router and the cat3550 just cannot form adjacency. Below is the debug
message:

07:28:30: OSPF: rcv. v:2 t:1 l:48 rid:10.10.10.1 aid:0.0.0.10 chk:7E15 aut:0
auk: from Vlan10
07:28:30: OSPF: Rcv hello from 10.10.10.1 area 11 from Vlan10 10.10.10.2
07:28:30: OSPF: End of hello processing
07:28:31: OSPF: rcv. v:2 t:2 l:32 rid:10.10.10.1 aid:0.0.0.10 chk:21B2 aut:0
auk: from Vlan10
07:28:31: OSPF: Rcv DBD from 10.10.10.1 on Vlan10 seq 0x2D3 opt 0x42 flag
0x7 len 32 mtu 1500 state EXSTART
07:28:31: OSPF: First DBD and we are not SLAVE
07:28:31: OSPF: Retransmitting DBD to 10.10.10.1 on Vlan10
07:28:31: OSPF: 10.10.10.1 address 10.10.10.2 on Vlan10 is dead, state DOWN
07:28:31: %OSPF-5-ADJCHG: Process 1, Nbr 10.10.10.1 on Vlan10 from EXSTART
to DOWN, Neighb or Down: Too many DBD retransmitions
07:28:31: OSPF: Neighbor change Event on interface Vlan10
07:28:36: OSPF: Rcv DBD from 10.10.10.1 on Vlan10 seq 0x2D3 opt 0x42 flag
0x7 len 32 mtu
1500 state DOWN
07:28:36: OSPF: Nbr state is less than INIT

I tried running other routing protocol between the switch and the router, it
worked fine. Can some body please tell me what's the problem with ospf?

Thanks,
SH

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