OSPF – Building the topology – Full OSPF topology

Let’s finish our full OSPF topology by adding a new area between R10 and R11.

 

Requirements :

 

Configure OSPF area 100 between R10 and R11.

 

Diagram:

OSPF - full topology

 

Configuration:

 

We will configure OSPF using the interface level command and then setup a virtual link between R10 and R3.

 


ip ospf 10 area 100
ip ospf network point-to-point

R10(config)#router ospf 10
R10(config-router)#area 3 virtual-link 33.33.33.33

R3(config)#router ospf 10
R3(config-router)#area 3 virtual-link 100.100.100.100

Let’s verify that the adjacency is ok.

 


R10#sh ip ospf neigh
Neighbor ID     Pri   State           Dead Time   Address         Interface
33.33.33.33       0   FULL/  -           -        10.10.39.1      OSPF_VL0

R3#sh ip ospf neigh
Neighbor ID     Pri   State           Dead Time   Address         Interface
100.100.100.100   0   FULL/  -           -        10.10.3.10      OSPF_VL0

R3#sh ip ospf int
OSPF_VL0 is up, line protocol is up
  Internet Address 10.10.39.1/30, Area 0, Attached via Not Attached
  Process ID 10, Router ID 33.33.33.33, Network Type VIRTUAL_LINK, Cost: 20
  Topology-MTID    Cost    Disabled    Shutdown      Topology Name
        0           20        no          no            Base
SNIP
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 100.100.100.100  (Hello suppressed)
  Suppress hello for 1 neighbor(s)

 

We now have a full  OSPF topology.

 

In the next posts, we will explore all the OSPF functionalities.

 

 

Thank you for reading.

 

OSPF – Building the topology – Full OSPF topology

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