SEFOS4 is configured as an ASBR router for redistributing the external routes into the OSPF domain.
SEFOS# configure terminal SEFOS(config)# router ospf SEFOS(config-router)# router-id 10.4.0.4 SEFOS(config-router)# asbr router SEFOS(config-router)# redistribute all SEFOS(config-router)# network 10.5.5.4 area 0.0.0.0 SEFOS(config-router)# exit SEFOS(config)# ip route 100.0.0.0 255.0.0.0 10.5.5.5 SEFOS(config)# end