From: Bogdan Sass (bogdan.sass@catc.ro)
Date: Mon Sep 15 2008 - 15:06:02 ART
I'm trying to configure a "very simple :P " OSPF area, between R2,
R3, and SW2 (all connected to the same ethernet segment: R2 via f0/0,
R3 via e0/1, and SW2 via VLAN23).
However, the adjacency with the switch gets stuck in the
EXCHANGE/EXSTART stage. I know it looks like an MTU mismatch, but... all
interfaces show an MTU of 1500 bytes, and the command "ip ospf
mtu-ignore" does not solve the problem.
[ Later edit: the switch interface is configured as part of a
vlan-bridge group, as per another task. If I remove the bridge-group
command from the interface, the neighbors immediately go to FULL. As
soon as I put the command back, they get stuck in EXSTART...
The problem is already on the IE forum (
http://forum.internetworkexpert.com/ubbthreads.php/ubb/showflat/Number/23481/page/1#Post23481
) , but there is no clear answer (seems to work for some people, not
work for others).
]
*Mar 1 00:29:40.807: OSPF: Send DBD to 150.1.2.2 on Vlan23 seq 0x10E2
opt 0x52 flag 0x7 len 32
*Mar 1 00:29:40.811: OSPF: Retransmitting DBD to 150.1.2.2 on Vlan23 [1]
Rack1SW2#
*Mar 1 00:29:43.083: OSPF: Send DBD to 150.1.3.3 on Vlan23 seq 0x243D
opt 0x52 flag 0x7 len 32
*Mar 1 00:29:43.087: OSPF: Retransmitting DBD to 150.1.3.3 on Vlan23 [1]
Rack1SW2#
*Mar 1 00:29:45.811: OSPF: Send DBD to 150.1.2.2 on Vlan23 seq 0x10E2
opt 0x52 flag 0x7 len 32
*Mar 1 00:29:45.815: OSPF: Retransmitting DBD to 150.1.2.2 on Vlan23 [2]
Rack1SW2#
*Mar 1 00:29:48.087: OSPF: Send DBD to 150.1.3.3 on Vlan23 seq 0x243D
opt 0x52 flag 0x7 len 32
*Mar 1 00:29:48.091: OSPF: Retransmitting DBD to 150.1.3.3 on Vlan23 [2]
Rack1SW2#
*Mar 1 00:29:50.815: OSPF: Send DBD to 150.1.2.2 on Vlan23 seq 0x10E2
opt 0x52 flag 0x7 len 32
*Mar 1 00:29:50.819: OSPF: Retransmitting DBD to 150.1.2.2 on Vlan23 [3]
Rack1SW2#
*Mar 1 00:29:53.091: OSPF: Send DBD to 150.1.3.3 on Vlan23 seq 0x243D
opt 0x52 flag 0x7 len 32
*Mar 1 00:29:53.095: OSPF: Retransmitting DBD to 150.1.3.3 on Vlan23 [3]
Rack1SW2#
*Mar 1 00:29:55.819: OSPF: Send DBD to 150.1.2.2 on Vlan23 seq 0x10E2
opt 0x52 flag 0x7 len 32
*Mar 1 00:29:55.823: OSPF: Retransmitting DBD to 150.1.2.2 on Vlan23 [4]
Rack1SW2#sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
150.1.2.2 1 EXSTART/DROTHER 00:00:38 173.1.23.2 Vlan23
150.1.3.3 1 EXSTART/BDR 00:00:30 173.1.23.3 Vlan23
Does anybody know what I should do to make both tasks work?
Thank you,
-- Bogdan Sass CCAI,CCNP,CCSP,JNCIA-ER Information Systems Security Professional "Curiosity was framed - ignorance killed the cat"Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Sat Oct 04 2008 - 09:26:18 ART