OSPF - MTU

From: nouman abbasi (abbasi.nouman@gmail.com)
Date: Fri Oct 24 2008 - 18:23:34 ARST


Hi,

Thanks to all for your reply on my earlier post.
I will soon hit the lab 1st time ; so curious questions starts floating and
u all GURU's with lots of experience are best to answer.

SW1==============SW2

Sw1 is connected via cross cable to Sw2 on port Fa 0/19
both have different MTU size

OSPF doesnt comes up and debug shows the following error

04:13:29: %OSPF-5-ADJCHG: Process 1, Nbr 8.8.8.8 on FastEthernet0/19 from
DOWN to DOWN, Neighbor Down: Ignore timer expired
04:15:49: %OSPF-5-ADJCHG: Process 1, Nbr 8.8.8.8 on FastEthernet0/19 from
EXSTART to DOWN, Neighbor Down: Too many retransmissions

if I do "IP ospf mtu-ignore" then all works well.

just wanted to know if in the lab it says dont change any initial config
and proctor says do as per question requirement, then what to do???

Will "IP ospf mtu ignore" impact other config on sw1 & SW2

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