From: Nick Shah (nshah@xxxxxxxxxxxxxx)
Date: Wed Jun 05 2002 - 06:02:55 GMT-3
IF it indeed turns out to be mtu issue, you can type ip ospf mtu-ignore in
interface config mode.
rgds
Nick
-----Original Message-----
From: Lab Candidate <labccie@yahoo.com>
To: ccielab@groupstudy.com <ccielab@groupstudy.com>
Date: Wednesday, 5 June 2002 6:21
Subject: OSPF neighbor problem
>two routers r3 and r5 won't form ospf neighbors over ethernet intf's.
>it's stuck in exstart state. could anyone please help with any advice?
>
>
>r3-e0/0----------f0/0-r5
>
>
>r3:
>
>interface Ethernet0/0
> ip address 170.10.54.1 255.255.255.0
> full-duplex
>!
>router ospf 9
> router-id 3.3.3.3
> log-adjacency-changes
> area 2 virtual-link 5.5.5.5
> network 170.10.50.0 0.0.0.255 area 2
> network 170.10.54.0 0.0.0.255 area 2
> network 170.10.80.0 0.0.0.255 area 0
> neighbor 170.10.80.4
> neighbor 170.10.80.2
>!
>r3#sh ip os n
>
>Neighbor ID Pri State Dead Time Address Interface
>170.10.30.1 0 FULL/DROTHER 00:01:38 170.10.80.4 Serial0/1
>198.133.219.25 0 FULL/DROTHER 00:01:45 170.10.80.2 Serial0/1
>5.5.5.5 1 EXSTART/DR 00:00:37 170.10.54.2
Ethernet0/0
>r3#
>
>
>r5:
>
>interface FastEthernet0/0
> ip address 170.10.54.2 255.255.255.0
> duplex auto
> speed auto
>
>router ospf 9
> router-id 5.5.5.5
> log-adjacency-changes
> area 2 virtual-link 3.3.3.3
> network 170.10.40.0 0.0.0.255 area 3
> network 170.10.54.0 0.0.0.255 area 2
>!
>
>r5#sh ip os n
>
>Neighbor ID Pri State Dead Time Address Interface
>3.3.3.3 1 EXSTART/BDR 00:00:35 170.10.54.1
FastEthernet0/0
>r5#
>
>
>==============debug=================
>
>r3#
>
>00:22:38: OSPF: Send DBD to 5.5.5.5 on Ethernet0/0 seq 0xDE7 opt 0x42 flag
0x7 l
>en 32
>00:22:38: OSPF: Retransmitting DBD to 5.5.5.5 on Ethernet0/0 [4]
>00:22:38: OSPF: rcv. v:2 t:1 l:48 rid:5.5.5.5
> aid:0.0.0.2 chk:2C70 aut:0 auk: from Ethernet0/0
>00:22:38: OSPF: Rcv hello from 5.5.5.5 area 2 from Ethernet0/0 170.10.54.2
>00:22:38: OSPF: End of hello processing
>r3#
>00:22:39: OSPF: Input packet while OSPF disabled on Serial0/0
>r3#
>00:22:43: OSPF: Send DBD to 5.5.5.5 on Ethernet0/0 seq 0xDE7 opt 0x42 flag
0x7 l
>en 32
>00:22:43: OSPF: Retransmitting DBD to 5.5.5.5 on Ethernet0/0 [5]
>r3#
>00:22:44: OSPF: Input packet while OSPF disabled on Serial0/0
>r3#
>00:22:48: OSPF: Send DBD to 5.5.5.5 on Ethernet0/0 seq 0xDE7 opt 0x42 flag
0x7 l
>en 32
>00:22:48: OSPF: Retransmitting DBD to 5.5.5.5 on Ethernet0/0 [6]
>00:22:48: OSPF: rcv. v:2 t:1 l:48 rid:5.5.5.5
> aid:0.0.0.2 chk:2C70 aut:0 auk: from Ethernet0/0
>00:22:48: OSPF: Rcv hello from 5.5.5.5 area 2 from Ethernet0/0 170.10.54.2
>00:22:48: OSPF: End of hello processing
>r3#
>00:22:49: OSPF: Input packet while OSPF disabled on Serial0/0
>r3#
>00:22:53: OSPF: Send DBD to 5.5.5.5 on Ethernet0/0 seq 0xDE7 opt 0x42 flag
0x7 l
>en 32
>00:22:53: OSPF: Retransmitting DBD to 5.5.5.5 on Ethernet0/0 [7]
>r3#
>00:22:54: OSPF: Input packet while OSPF disabled on Serial0/0
>r3#
>00:22:58: OSPF: rcv. v:2 t:1 l:48 rid:5.5.5.5
> aid:0.0.0.2 chk:2C70 aut:0 auk: from Ethernet0/0
>00:22:58: OSPF: Rcv hello from 5.5.5.5 area 2 from Ethernet0/0 170.10.54.2
>00:22:58: OSPF: End of hello processing
>00:22:58: OSPF: Send DBD to 5.5.5.5 on Ethernet0/0 seq 0xDE7 opt 0x42 flag
0x7 l
>en 32
>00:22:58: OSPF: Retransmitting DBD to 5.5.5.5 on Ethernet0/0 [8]
>00:22:58: OSPF: rcv. v:2 t:1 l:48 rid:170.10.30.1
> aid:0.0.0.0 chk:3328 aut:0 auk: from Serial0/1
>00:22:58: OSPF: Rcv hello from 170.10.30.1 area 0 from Serial0/1
170.10.80.4
>00:22:58: OSPF: End of hello processing
>r3#
>00:22:59: OSPF: Input packet while OSPF disabled on Serial0/0
>r3#
>00:23:03: OSPF: Send DBD to 5.5.5.5 on Ethernet0/0 seq 0xDE7 opt 0x42 flag
0x7 l
>en 32
>00:23:03: OSPF: Retransmitting DBD to 5.5.5.5 on Ethernet0/0 [9]
>r3#
>00:23:04: OSPF: Input packet while OSPF disabled on Serial0/0
>r3#
>00:23:05: OSPF: rcv. v:2 t:1 l:48 rid:198.133.219.25
> aid:0.0.0.0 chk:5994 aut:0 auk: from Serial0/1
>00:23:05: OSPF: Rcv hello from 198.133.219.25 area 0 from Serial0/1
170.10.80.2
>00:23:05: OSPF: End of hello processing
>r3#
>00:23:08: OSPF: rcv. v:2 t:1 l:48 rid:5.5.5.5
> aid:0.0.0.2 chk:2C70 aut:0 auk: from Ethernet0/0
>00:23:08: OSPF: Rcv hello from 5.5.5.5 area 2 from Ethernet0/0 170.10.54.2
>00:23:08: OSPF: End of hello processing
>00:23:08: OSPF: Send DBD to 5.5.5.5 on Ethernet0/0 seq 0xDE7 opt 0x42 flag
0x7 l
>en 32
>00:23:08: OSPF: Retransmitting DBD to 5.5.5.5 on Ethernet0/0 [10]
>r3#
>00:23:09: OSPF: Input packet while OSPF disabled on Serial0/0
>r3#
>00:23:13: OSPF: Send DBD to 5.5.5.5 on Ethernet0/0 seq 0xDE7 opt 0x42 flag
0x7 l
>en 32
>00:23:13: OSPF: Retransmitting DBD to 5.5.5.5 on Ethernet0/0 [11]
>r3#
>00:23:14: OSPF: Input packet while OSPF disabled on Serial0/0
>r3#
>00:23:18: OSPF: rcv. v:2 t:1 l:48 rid:5.5.5.5
> aid:0.0.0.2 chk:2C70 aut:0 auk: from Ethernet0/0
>00:23:18: OSPF: Rcv hello from 5.5.5.5 area 2 from Ethernet0/0 170.10.54.2
>00:23:18: OSPF: End of hello processing
>00:23:18: OSPF: Send DBD to 5.5.5.5 on Ethernet0/0 seq 0xDE7 opt 0x42 flag
0x7 l
>en 32
>00:23:18: OSPF: Retransmitting DBD to 5.5.5.5 on Ethernet0/0 [12]
>
>
>r5#
>
>r5#
>*Mar 1 00:24:23.495: OSPF: rcv. v:2 t:1 l:48 rid:3.3.3.3
> aid:0.0.0.2 chk:C7D aut:0 auk: from FastEthernet0/0
>*Mar 1 00:24:23.495: OSPF: Rcv hello from 3.3.3.3 area 2 from
FastEthernet0/0 1
>70.10.54.1
>*Mar 1 00:24:23.499: OSPF:
>OSPF: Nbr 3.3.3.3 170.10.54.1 FastEthernet0/0 is currently ignored
>r5#
>*Mar 1 00:24:33.495: OSPF: rcv. v:2 t:1 l:48 rid:3.3.3.3
> aid:0.0.0.2 chk:C7D aut:0 auk: from FastEthernet0/0
>*Mar 1 00:24:33.495: OSPF: Rcv hello from 3.3.3.3 area 2 from
FastEthernet0/0 1
>70.10.54.1
>*Mar 1 00:24:33.495: OSPF:
>OSPF: Nbr 3.3.3.3 170.10.54.1 FastEthernet0/0 is currently ignored
>r5# deb ip os p
>OSPF packet debugging is on
>r5#
>*Mar 1 00:24:43.495: OSPF: rcv. v:2 t:1 l:48 rid:3.3.3.3
> aid:0.0.0.2 chk:C7D aut:0 auk: from FastEthernet0/0
>*Mar 1 00:24:43.495: OSPF: Rcv hello from 3.3.3.3 area 2 from
FastEthernet0/0 1
>70.10.54.1
>*Mar 1 00:24:43.495: OSPF:
>OSPF: Nbr 3.3.3.3 170.10.54.1 FastEthernet0/0 is currently ignored
>r5# deb ip os e
>OSPF events debugging is on
>r5# deb ip os a
>OSPF adjacency events debugging is on
>r5#
>*Mar 1 00:24:47.079: OSPF: 3.3.3.3 address 170.10.54.1 on FastEthernet0/0
is de
>ad
>*Mar 1 00:24:47.079: OSPF: 3.3.3.3 address 170.10.54.1 on FastEthernet0/0
is de
>ad, state DOWN
>*Mar 1 00:24:47.079: %OSPF-5-ADJCHG: Process 9, Nbr 3.3.3.3 on
FastEthernet0/0
>from DOWN to DOWN, Neighbor Down: Dead timer expired
>r5# deb ip os
>*Mar 1 00:24:47.079: OSPF: Neighbor change Event on interface
FastEthernet0/0
>*Mar 1 00:24:47.079: OSPF: DR/BDR election on FastEthernet0/0
>*Mar 1 00:24:47.079: OSPF: Elect BDR 0.0.0.0
>*Mar 1 00:24:47.079: OSPF: Elect DR 5.5.5.5
>*Mar 1 00:24:47.079: DR: 5.5.5.5 (Id) BDR: none
>*Mar 1 00:24:47.583: OSPF: No full nbrs to build Net Lsa for interface
FastEthe
>rnet0/0
>r5# deb ip os h
>OSPF hello events debugging is on
>r5#
>*Mar 1 00:24:53.499: OSPF: rcv. v:2 t:1 l:48 rid:3.3.3.3
> aid:0.0.0.2 chk:C7D aut:0 auk: from FastEthernet0/0
>*Mar 1 00:24:53.499: OSPF: Rcv hello from 3.3.3.3 area 2 from
FastEthernet0/0 1
>70.10.54.1
>*Mar 1 00:24:53.499: OSPF: 2 Way Communication to 3.3.3.3 on
FastEthernet0/0, s
>tate 2WAY
>*Mar 1 00:24:53.499: OSPF: Neighbor change Event on interface
FastEthernet0/0
>*Mar 1 00:24:53.499: OSPF: DR/BDR election on FastEthernet0/0
>*Mar 1 00:24:53.499: OSPF: Elect BDR 0.0.0.0
>*Mar 1 00:24:53.499: OSPF: Elect DR 5.5.5.5
>*Mar 1 00:24:53.503: DR: 5.5.5.5 (Id) BDR: none
>r5#
>*Mar 1 00:24:53.503: OSPF: Send DBD to 3.3.3.3 on FastEthernet0/0 seq
0x1B6B op
>t 0x42 flag 0x7 len 32
>*Mar 1 00:24:53.503: OSPF: End of hello processing
>r5#
>*Mar 1 00:24:58.503: OSPF: Send DBD to 3.3.3.3 on FastEthernet0/0 seq
0x1B6B op
>t 0x42 flag 0x7 len 32
>*Mar 1 00:24:58.503: OSPF: Retransmitting DBD to 3.3.3.3 on
FastEthernet0/0 [1]
>r5#
>*Mar 1 00:25:02.079: OSPF: rcv. v:2 t:2 l:32 rid:3.3.3.3
> aid:0.0.0.2 chk:9981 aut:0 auk: from FastEthernet0/0
>*Mar 1 00:25:02.079: OSPF: Rcv DBD from 3.3.3.3 on FastEthernet0/0 seq
0x1671 o
>pt 0x42 flag 0x7 len 32 mtu 1500 state EXSTART
>*Mar 1 00:25:02.079: OSPF: First DBD and we are not SLAVE
>*Mar 1 00:25:03.495: OSPF: rcv. v:2 t:1 l:48 rid:3.3.3.3
> aid:0.0.0.2 chk:2C70 aut:0 auk: from FastEthernet0/0
>*Mar 1 00:25:03.499: OSPF: Rcv hello from 3.3.3.3 area 2 from
FastEthernet0/0 1
>70.10.54.1
>*Mar 1 00:25:03.499: OSPF: Neighbor change Event on interface
FastEthernet0/0
>*Mar 1 00:25:03.499: OSPF: DR/BDR election on FastEthernet0/0
>*Mar 1 00:25:03.499: OSPF: Elect BDR 3.3.3.3
>*Mar 1 00:25:03.499: OSPF: Elect DR 5.5.5.5
>*Mar 1 00:25:03.499: DR: 5.5.5.5 (Id) BDR: 3.3.3.3 (Id)
>*Mar 1 00:25:03.499: OSPF: End of hello processing
>*Mar 1 00:25:03.503: OSPF: Send DBD to 3.3.3.3 on FastEthernet0/0 seq
0x1B6B op
>t 0x42 flag 0x7 len 32
>r5#
>*Mar 1 00:25:03.503: OSPF: Retransmitting DBD to 3.3.3.3 on
FastEthernet0/0 [2]
>r5#
>*Mar 1 00:25:07.079: OSPF: rcv. v:2 t:2 l:32 rid:3.3.3.3
> aid:0.0.0.2 chk:9981 aut:0 auk: from FastEthernet0/0
>*Mar 1 00:25:07.079: OSPF: Rcv DBD from 3.3.3.3 on FastEthernet0/0 seq
0x1671 o
>pt 0x42 flag 0x7 len 32 mtu 1500 state EXSTART
>*Mar 1 00:25:07.079: OSPF: First DBD and we are not SLAVE
>r5#
>*Mar 1 00:25:08.503: OSPF: Send DBD to 3.3.3.3 on FastEthernet0/0 seq
0x1B6B op
>t 0x42 flag 0x7 len 32
>*Mar 1 00:25:08.503: OSPF: Retransmitting DBD to 3.3.3.3 on
FastEthernet0/0 [3]
>r5#
>*Mar 1 00:25:12.079: OSPF: rcv. v:2 t:2 l:32 rid:3.3.3.3
> aid:0.0.0.2 chk:9981 aut:0 auk: from FastEthernet0/0
>*Mar 1 00:25:12.079: OSPF: Rcv DBD from 3.3.3.3 on FastEthernet0/0 seq
0x1671 o
>pt 0x42 flag 0x7 len 32 mtu 1500 state EXSTART
>*Mar 1 00:25:12.079: OSPF: First DBD and we are not SLAVE
>r5#
>*Mar 1 00:25:13.495: OSPF: rcv. v:2 t:1 l:48 rid:3.3.3.3
> aid:0.0.0.2 chk:2C70 aut:0 auk: from FastEthernet0/0
>*Mar 1 00:25:13.499: OSPF: Rcv hello from 3.3.3.3 area 2 from
FastEthernet0/0 1
>70.10.54.1
>*Mar 1 00:25:13.499: OSPF: End of hello processing
>*Mar 1 00:25:13.503: OSPF: Send DBD to 3.3.3.3 on FastEthernet0/0 seq
0x1B6B op
>t 0x42 flag 0x7 len 32
>*Mar 1 00:25:13.503: OSPF: Retransmitting DBD to 3.3.3.3 on
FastEthernet0/0 [4]
>r5#
>*Mar 1 00:25:17.079: OSPF: rcv. v:2 t:2 l:32 rid:3.3.3.3
> aid:0.0.0.2 chk:9981 aut:0 auk: from FastEthernet0/0
>*Mar 1 00:25:17.079: OSPF: Rcv DBD from 3.3.3.3 on FastEthernet0/0 seq
0x1671 o
>pt 0x42 flag 0x7 len 32 mtu 1500 state EXSTART
>*Mar 1 00:25:17.083: OSPF: First DBD and we are not SLAVE
>r5#
>*Mar 1 00:25:18.503: OSPF: Send DBD to 3.3.3.3 on FastEthernet0/0 seq
0x1B6B op
>t 0x42 flag 0x7 len 32
>*Mar 1 00:25:18.503: OSPF: Retransmitting DBD to 3.3.3.3 on
FastEthernet0/0 [5]
>r5#
>*Mar 1 00:25:22.079: OSPF: rcv. v:2 t:2 l:32 rid:3.3.3.3
> aid:0.0.0.2 chk:9981 aut:0 auk: from FastEthernet0/0
>*Mar 1 00:25:22.079: OSPF: Rcv DBD from 3.3.3.3 on FastEthernet0/0 seq
0x1671 o
>pt 0x42 flag 0x7 len 32 mtu 1500 state EXSTART
>*Mar 1 00:25:22.083: OSPF: First DBD and we are not SLAVE
>r5#
>*Mar 1 00:25:23.499: OSPF: rcv. v:2 t:1 l:48 rid:3.3.3.3
> aid:0.0.0.2 chk:2C70 aut:0 auk: from FastEthernet0/0
>*Mar 1 00:25:23.499: OSPF: Rcv hello from 3.3.3.3 area 2 from
FastEthernet0/0 1
>70.10.54.1
>*Mar 1 00:25:23.499: OSPF: End of hello processing
>*Mar 1 00:25:23.503: OSPF: Send DBD to 3.3.3.3 on FastEthernet0/0 seq
0x1B6B op
>t 0x42 flag 0x7 len 32
>*Mar 1 00:25:23.503: OSPF: Retransmitting DBD to 3.3.3.3 on
FastEthernet0/0 [6
>
>
>
>
>
>
This archive was generated by hypermail 2.1.4 : Tue Jul 02 2002 - 08:12:25 GMT-3