From: Piotr (usaccie@gmail.com)
Date: Fri Dec 12 2008 - 01:58:19 ARST
What does *debug ip ospf adj* show?
MTU needs to match for an OSPF adjacency to form.
common solutions
1. Change the system MTU on the switch. - (3560 = system mtu
(requires a reboot)
or system mtu routing (no reboot))
2. Configure ip ospf mtu-ignore. (this is needed only on one side)
3. configure the MTU on the VLAN interface with the "IP MTU" command.
(on a 3550)
On Thu, Dec 11, 2008 at 7:22 PM, nouman abbasi <abbasi.nouman@gmail.com>wrote:
> *Jul 13 19:10:59.015: %OSPF-5-ADJCHG: Process 1, Nbr 7.7.7.7 on
> FastEthernet0/0.11 from DOWN to DOWN, Neighbor Down: Ignore timer ex
>
>
> Hi GS,
>
> whenever we see the above message the first doubt goes on MTU Size ; ( if
> MTU size is same ; what are other options to check )
>
> On SW we can check mtu size = sh system mtu
> how to check on Router and is it possible that old router 1700 series with
> old IOS will have different mtu size
>
>
> Thanks
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Thu Jan 01 2009 - 12:53:08 ARST