RE: OSPF stuck in Exstart phase -- due to MTU mismatch --

From: Robert Hosford (rhosford@certifiednets.com)
Date: Fri Apr 13 2007 - 11:56:52 ART

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I have seen this before. Lower the switch MTU.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Mohamed Radwan
Sent: Sunday, April 08, 2007 9:09 AM
To: ccielab@groupstudy.com
Subject: OSPF stuck in Exstart phase -- due to MTU mismatch --

Hello everybody,

I am facing a problem with ospf neighbor to established
the neighborship is stuck in Exstart phase
and when I debug it . if found the problem with MTU between a router and
switch
here is the ropology SW1 --- R1

r1(config-if)#mtu 1504
% Interface FastEthernet0/0 does not support user settable mtu.

SW1#sh int fa0/1 | in MTU
  MTU 1504 bytes, BW 100000 Kbit, DLY 100 usec

R1#sh int fa0/0 | in MTU
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

any ideas?

Thanks

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