Lab 37 - OSPF Other Features

Prerequisites: CCNP level skills.

Topology

 Pic. 1 - OSPF Topology.

Icons designed by: Andrzej Szoblik - http://www.newo.pl

Task 1
R3 does not get full adjacency with a newly connected switch to its F1/0 interface. Debug shows problems with MTU (switch uses 1512 bytes as per 'show system mtu'). Which command can resolve the issue on R3's F1/0 interface?

Task 2
R2 is connected to an ISP and started to generate LSA Type 6 (MOSPF) errors. Make sure R2 does not generate these messages.

Task 3
Configure R2 so it provides the following output (name 'R1' instead of 1.1.1.1):

Pic. 2 - OSPF Output on R2.

Pic. 3 - OSPF Output on R2.

Lab Solution

Task 1
R3 does not get full adjacency with a newly connected switch to its F1/0 interface. Debug shows problems with MTU (switch uses 1512 bytes as per 'show system mtu'). Which command can resolve the issue on R3's F1/0 interface?

R3 Configuration:

!

interface FastEthernet1/0
 ip ospf mtu-ignore

!

Task 2

R2 is connected to an ISP and started to generate LSA Type6 (MOSPF) errors. Make sure R2 does not generate these messages.

R2 Configuration:

!

router ospf 1
 router-id 2.2.2.2
 ignore lsa mospf
 log-adjacency-changes
 network 10.1.12.2 0.0.0.0 area 0
 network 172.16.102.2 0.0.0.0 area 0

!

Task 3
Configure R2 so it provides the following output (name 'R1' instead of 1.1.1.1): 

R2 Configuration:

!

ip host R1 1.1.1.1

ip ospf name-lookup

!