OSPF concepts in version 3 are exactly the same as version 2 with some minor differences.
- Neighbor relationships between the Link Local Addresses.
- Enabled under the interface itself. Global configuration still exists but is for tuning parameters.
- No authentication – relies on native IPv6 encryption.
IPv6 Routing is required: ipv6 unicast-routing
To enable OSPFv3: (interface) ipv6 ospf <process> area <area>
R1(config-if)#ipv6 ospf 1 area 10
%OSPFv3-4-NORTRID: OSPFv3 process 1 could not pick a router-id, please configure manually
R1(config-if)#ipv6 router ospf 1
%OSPFv3-5-ADJCHG: Process 1, Nbr 0.0.0.3 on Serial1/0 from LOADING to FULL, Loading Done
Note that neighbors will not form without the router-id being set.
show ipv6 protocols
R1#show ipv6 protocols
IPv6 Routing Protocol is “connected”
IPv6 Routing Protocol is “ND”
IPv6 Routing Protocol is “ospf 1”
Interfaces (Area 0):
Interfaces (Area 10):
show ipv6 ospf neighbor
Neighbor ID Pri State Dead Time Interface ID Interface
0.0.0.3 0 FULL/ – 00:00:33 6 Serial1/0
0.0.0.2 1 FULL/BDR 00:00:39 2 Ethernet0/0
show ipv6 ospf interface
R2#show ipv6 ospf int
Ethernet0/0 is up, line protocol is up
Link Local Address FE80::A8BB:CCFF:FE00:200, Interface ID 2
Area 10, Process ID 1, Instance ID 0, Router ID 0.0.0.2
Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State BDR, Priority 1
Designated Router (ID) 0.0.0.1, local address FE80::A8BB:CCFF:FE00:100
Backup Designated router (ID) 0.0.0.2, local address FE80::A8BB:CCFF:FE00:200
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:02
Graceful restart helper support enabled
Index 1/1/1, flood queue length 0
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 0.0.0.1 (Designated Router)
Suppress hello for 0 neighbor(s)