Configure SEFOS4

1. Type.

   SEFOS# configure terminal
   SEFOS(config)# router ospf
   

2. Configure the OSPF router ID.

   SEFOS(config-router)# router-id 10.4.0.4
   

3. Enable OSPF over the VLAN interface and associate the interface with an OSPF area.

   SEFOS(config-router)# network 10.4.0.4 area 0.0.0.0
   SEFOS(config-router)# network 10.5.6.4 area 0.0.0.3
   SEFOS(config-router)# network 10.5.5.4 area 0.0.0.3
   

4. Configure the virtual link for backbone connectivity.

   SEFOS(config-router)# area 0.0.0.3 virtual-link 10.7.0.6
   SEFOS(config-router)# area 0.0.0.3 virtual-link 10.8.0.5
   

5. Exit Router Configuration mode.

   SEFOS(config-router)# end