OSPF MTU Issue (Mismatch Area X In The Header)

From: Tom Hanks (t_hanks_2007@yahoo.com)
Date: Wed Dec 26 2007 - 05:59:50 ART


Hi Guys,

I am facing a problem in a topology where an OSPF area X is connecting R1 and R2 to my 4 switches, and two of the 4 switches are also running OSPF Area Y. I am running a DOT1q-tunnel on two switches, hence am changing the MTU of all the the switches to 1504 since the 4 switches are meshed(system mtu 1504).

However, I am facing a problem on one of the frame-relay point to point connections forming an adjacency in OSPF area X on R1 and R2. I have given the command "ip ospf mtu-ignore" on the relevant interfaces of R1 and R2 that are connecting to the switches, however R1 and R2 adjacency over frame-relay serial main int gets stuck in INIT state, and when I run debug it says :

"Mismatch Area X in the header"

Any clues on this ?

Regards

Tom

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