From: Shahid Ansari (shahid1357@gmail.com)
Date: Fri Oct 24 2008 - 18:55:42 ARST
Brother Nouman,
How are you ? I think you need to complete all your special lab by
Groupstudy .
If you read TCP/IP Volume 1/2 by Jeff Doyle all your questions will be
solved .
anyway ,
If there is mtu mismatch ospf list shows Exstart/Exchange(Database
Exchange), on both side mtu must be same otherwise neighbor relationship
will not form.MTU field is in Database description format .
If you are using 3560 just check with "system mtu XXX" command .
On Fri, Oct 24, 2008 at 11:23 PM, nouman abbasi <abbasi.nouman@gmail.com>wrote:
> 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
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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-- Regards,Shahid Ansari Saudi Arabia(Riyadh)
Blogs and organic groups at http://www.ccie.net
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