OSPFv3 across the triangle
The three routers have IPv6 addresses and IPv6 routing on, but no IPv6 routes. Run OSPFv3 process 1 in area 0 on every interface (LANs, links and loopbacks). Router IDs: R1 1.1.1.1, R2 2.2.2.2, R3 3.3.3.3. The LAN interfaces (R1 Gi0/0, R2 Gi0/2, R3 Gi0/2) must be passive.
How it works: this is VulnTech NetLab, a network simulator running in your browser. Click a device in the diagram to open its console and type commands, just like on real equipment (? shows help, Tab finishes a word). Click a cable to inspect it. Tasks tick themselves off as you complete them; questions are answered in the box under each task. Your work is kept if you reload; Reset starts the network over.
Solution explanation
OSPFv3 has no network command: each interface joins with ipv6 ospf 1 area 0. interface range saves typing. Loopbacks are advertised as /128 host routes, just as OSPFv2 advertises them as /32s.
Show solution
[R1]
enable
configure terminal
ipv6 router ospf 1
router-id 1.1.1.1
passive-interface g0/0
exit
interface range g0/0 - 2
ipv6 ospf 1 area 0
interface loopback0
ipv6 ospf 1 area 0
end
[R2]
enable
configure terminal
ipv6 router ospf 1
router-id 2.2.2.2
passive-interface g0/2
exit
interface range g0/0 - 2
ipv6 ospf 1 area 0
interface loopback0
ipv6 ospf 1 area 0
end
[R3]
enable
configure terminal
ipv6 router ospf 1
router-id 3.3.3.3
passive-interface g0/2
exit
interface range g0/0 - 2
ipv6 ospf 1 area 0
interface loopback0
ipv6 ospf 1 area 0
end
show ipv6 ospf neighbor
[R1]
show ipv6 route ospf
ping 2001:db8:3::1