From: ISolveSystems (support@isolvesystems.com)
Date: Wed Aug 22 2007 - 19:54:35 ART
I have configured the mtu-ignore on both R4 and R5. They also have default
ospf priority. Still stuck...Layer 2 should be alright as I just verified
the spanning tree and ping each other's IP...
On 8/22/07, Joseph Brunner <joe@affirmedsystems.com> wrote:
>
> If the task doesn't say don't do it, I always run "ip ospf mtu-ignore"
> around the switches!
>
> LOL they often have a 1514 svi mtu, or 1504 system mtu when running
> l2tp-tunneling. 99% I run this as a best practice. If ever a task doesn't
> allow it, then just adjust the ip mtu on the svi, etc. of the switch.
>
> -Joe
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> ISolveSystems
> Sent: Wednesday, August 22, 2007 6:39 PM
> To: Cisco certification
> Subject: IP OSPF neigh stuck in 2WAY
>
> Hello expert,
>
> R5(FA0/1) and R4(Fa0/0) are in VL45 as well as SW3 and SW4. For some
> reason, R4 and R5 stuck in two way. All the others neighbor up. I have
> turned on debugging and check the config and found nothing wrong.
>
> Any idea?
>
> Rack1R5(config-if)#do sh ip osp nei
>
> Neighbor ID Pri State Dead Time Address
> Interface
> 150.1.4.4 0 FULL/ - - 129.1.54.4
> Serial0/0/0.54
> 150.1.4.4 1 2WAY/DROTHER 00:00:39 129.1.45.4
> FastEthernet0/1
> 150.1.9.9 1 FULL/DR 00:00:32 129.1.45.1
> FastEthernet0/1
> 150.1.10.10 1 FULL/BDR 00:00:38 129.1.45.2
> FastEthernet0/1
> 150.1.8.8 1 FULL/DR 00:00:34 129.1.58.8
> FastEthernet0/0
> Rack1R5(config-if)#
>
> Rack1R4#sh ip osp nei
>
> Neighbor ID Pri State Dead Time Address
> Interface
> 150.1.5.5 0 FULL/ - - 129.1.54.5
> Serial0/0/0.54
> 150.1.6.6 1 FULL/BDR 00:00:34 129.1.46.6
> FastEthernet0/1
> 150.1.5.5 1 2WAY/DROTHER 00:00:31 129.1.45.5
> FastEthernet0/0
> 150.1.9.9 1 FULL/DR 00:00:37 129.1.45.1
> FastEthernet0/0
> 150.1.10.10 1 FULL/BDR 00:00:33 129.1.45.2
> FastEthernet0/0
> Rack1R4#
>
> Rack1SW3(config-if)#do sh ip osp nei
>
> Neighbor ID Pri State Dead Time Address
> Interface
> 150.1.4.4 1 FULL/DROTHER 00:00:35 129.1.45.4 Vlan45
> 150.1.5.5 1 FULL/DROTHER 00:00:32 129.1.45.5 Vlan45
> 150.1.10.10 1 FULL/BDR 00:00:34 129.1.45.2 Vlan45
> 150.1.10.10 0 FULL/ - 00:00:34 129.1.34.10
> Port-channel34
> Rack1SW3(config-if)#
>
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This archive was generated by hypermail 2.1.4 : Sat Sep 01 2007 - 11:32:12 ART