From: Moses Polalysa (mpurple7@yahoo.com)
Date: Thu Mar 27 2008 - 00:30:37 ART
Thanks a lot, Mike. I forgot I changed the switch system MTU for dot1q-tunneling test yesteday.
Now solved. :)
Regards,
Moses
----- Original Message ----
From: Mike Haddad <mike.haddad@hotmail.com>
To: Moses Polalysa <mpurple7@yahoo.com>; ccielab@groupstudy.com
Sent: Thursday, March 27, 2008 10:11:53 AM
Subject: RE: OSPF 2-way neigborship EXSTART
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Try to add "ip ospf mtu-ignore" on the OSPF interface on the routers. IF you debug ip ospf you will see that the issue is the MTU mismtach between the switch and the router.
Regards.
> Date: Wed, 26 Mar 2008 20:07:19 -0700
> From: mpurple7@yahoo.com
> Subject: OSPF 2-way neigborship EXSTART
> To: ccielab@groupstudy.com
>
> Hi expert,
>
> Sorry for ask many question in this forum.
>
> I like to create 2-way neighborship between 2 Router & Swithes.
>
> R1 (int fa0/1) ---vlan10--- SW ---vlan10--- (int fa0/1) R2
>
> on R1
> router ospf 1
> router-id 1.1.1.1
> net 1.1.1.1 0.0.0.0 a 0
> net 192.168.10.1 0.0.0.0 a 0
> int fa0/1
> ip ospf pri 0
>
> on R2
> router ospf 1
> router-id 2.2.2.2
> net 2.2.2.2 0.0.0.0 a 0
> net 192.168.10.2 0.0.0.0 a 0
> int fa0/1
> ip ospf pri 0
>
> on SW
> ip routing
> router ospf 1
> router-id 3.3.3.3
> net 3.3.3.3 0.0.0.0 a 0
> net 192.168.10.254 0.0.0.0 a 0
> int vlan 10
> ip ospf pri 255
>
> But way there's error message like this:
>
> on R1 & R2
> *Mar 27 02:51:38.486: %OSPF-5-ADJCHG: Process 1, Nbr 3.3.3.3 on FastEthernet0/1 from DOWN to DOWN, Neighbor Down: Ignore timer expired
> *Mar 27 02:53:53.062: %OSPF-5-ADJCHG: Process 1, Nbr 3.3.3.3 on FastEthernet0/1 from EXSTART to DOWN, Neighbor Down: Too many retransmissions
>
> on SW
> 04:57:21: %OSPF-5-ADJCHG: Process 1, Nbr 1.1.1.1 on Vlan10 from DOWN to DOWN, Neighbor Down: Ignore timer expired
> 04:57:21: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Vlan10 from DOWN to DOWN, Neighbor Down: Ignore timer expired
>
> Please help. Thanks in advance.
>
>
> Regards,
>
> Moses
>
>
>
>
>
>
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