Scenario
Area 3 is seperated from the backbone each. The below config shows the configuration from the point of view of R1
IOS Config
hostname R1 ! interface FastEthernet0/0 description link to R4 ip address 192.168.14.1 255.255.255.252 ip ospf 1 area 0 speed 100 full-duplex ! interface FastEthernet0/1 description link to R2 ip address 172.16.12.1 255.255.255.252 ip ospf 1 area 2 speed 100 full-duplex ! router ospf 1 router-id 1.1.1.1 log-adjacency-changes area 2 virtual-link 3.3.3.3 ! |
XR Config
hostname R1 ! interface GigabitEthernet0/0/0/0 description link to R4 ipv4 address 172.16.14.1 255.255.255.252 speed 100 duplex full ! interface GigabitEthernet0/0/0/1 ipv4 address 172.16.12.1 255.255.255.252 speed 100 duplex full ! router ospf 1 router-id 1.1.1.1 address-family ipv4 unicast area 0 interface GigabitEthernet0/0/0/0 ! ! area 2 virtual-link 3.3.3.3 ! interface GigabitEthernet0/0/0/1 ! ! |