From: Mohammad Saeed (mzsaeed@gmail.com)
Date: Tue Feb 06 2007 - 01:34:46 ART
Thank you very much Brian and Victor for excellent response....
Regards,
Mohammad Zahed Saeed
On 2/5/07, Brian Dennis <bdennis@internetworkexpert.com> wrote:
> Rack1R3#debug ip ospf adj
> OSPF adjacency events debugging is on
>
> *** Standard Ethernet ***
>
> Rack1R3(config)#int Ethernet0/0
> Rack1R3(config-if)#mtu 1504
> % Interface Ethernet0/0 does not support user settable mtu.
> Rack1R3(config-if)#ip mtu 1504
> ^
> % Invalid input detected at '^' marker.
>
> Rack1R3(config-if)#ip mtu 150?
> <68-1500>
>
> *** FastEthernet ***
>
> Rack1R1(config)#int FastEthernet0/0
> Rack1R1(config-if)#mtu 1504
> % Interface FastEthernet0/0 does not support user settable mtu.
> Rack1R1(config-if)#ip mtu 1504
> ^
> % Invalid input detected at '^' marker.
>
> Rack1R1(config-if)#ip mtu 150?
> <68-1500>
>
> *** GigabitEthernet ***
>
> Rack1R6(config)#int GigabitEthernet0/0
> Rack1R6(config-if)#mtu 1504
> Rack1R6(config-if)#ip mtu
> Rack1R6(config-if)#ip mtu 1504
> Rack1R6(config-if)#
>
> --
>
> Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP)
> bdennis@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987
> Direct: 775-745-6404 (Outside the US and Canada)
>
>
> On 2/5/07 8:03 PM, "Mohammad Saeed" <mzsaeed@gmail.com> wrote:
>
> > Hi Every body,
> >
> > I am just wondering, how to verify the ospf adjacensy is not coming up
> > and reason is MTU mismatch? Like if you have set
> >
> > system mtu 1504 on the switch and there are routers using that switch
> > to establish adjacency, they will be stuck in INIT/EXSTRAT State, what
> > type of debug can show that the adjacency is stuck because of MTU
> > mismatch?
> >
> > How can you change MTU to 1504 on the router interface to match if you
> > don't want to use ip ospf mtu-ignore command under interfaces?
> >
> >
> > Regards,
> >
> > Mohammad Zahed Saeed
> >
> > _______________________________________________________________________
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