Exploring the quirks of Network Engineering
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
!
!
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