OSPFv3

OSPFv2 does not support IPv6
IPv6 is supported by OSPFv3 which can be configured from the interface
with following commands

couple of commands that need to enabled for IPv6 routing to work
ipv6 cef                      Cisco Express Forwarding for IPv6
Cisco Express Forwarding (allow routers to making and an efficient routing decisions based on FIB (forwarding Information Base) and adjacency table 
ipv6 unicast-routing   Enable unicast routing (which enables the router to route traffic based on destination IPv6 addresses)

R1>interfaces ip information
interface Loopback0
ip address 1.1.1.1 255.255.255.255
interface FastEthernet0/0
no ip address
duplex auto

speed auto

ipv6 address 2000:11AA::1/64

interface FastEthernet1/0

no ip address

duplex auto

speed auto

ipv6 address 2000:1122::1/64

Configuring OSPv3  do the same commands on R2 & R3

R1# conf ter

Enter configuration commands, one per line.  End with CNTL/Z.

R1(config)#ipv

R1(config)#ipv6 router

R1(config)#ipv6 router os

R1(config)#ipv6 router ospf 1

R1(config-rtr)#router-id 

Note: error message if IPv6 unicast not enable 

R2(config)#ipv6 router ospf 1

% IPv6 routing not enabled

configuring interfaces with OSPFv3 with with this command 

R1#conf ter

Enter configuration commands, one per line.  End with CNTL/Z.

R1(config)#inter fas

R1(config)#inter fastEthernet 0/0

R1(config-if)#ipv

R1(config-if)#ipv6 osp

R1(config-if)#ipv6 ospf ?

  <1-65535>            Process ID

  authentication       Enable authentication

  cost                 Interface cost

  database-filter      Filter OSPF LSA during synchronization and flooding

  dead-interval        Interval after which a neighbor is declared dead

  demand-circuit       OSPF demand circuit

  flood-reduction      OSPF Flood Reduction

  hello-interval       Time between HELLO packets

  mtu-ignore           Ignores the MTU in DBD packets

  neighbor             OSPF neighbor

  network              Network type

  priority             Router priority

  retransmit-interval  Time between retransmitting lost link state

                       advertisements

  transmit-delay       Link state transmit delay

R1(config-if)#ipv6 ospf 1 are

R1(config-if)#ipv6 ospf 1 area 0

R1(config-if)#

R2(config)#interface fas 0/0

R2(config-if)#ipv

R2(config-if)#ipv6 osp

R2(config-if)#ipv6 ospf 1 area 0

R2(config-if)#

*Mar  1 01:06:29.099: %OSPFv3-5-ADJCHG: Process 1, Nbr 1.1.1.1 on FastEthernet0/0 from LOADING to FULL, Loading Done

As soon we configured R2 interface adjacency formed with neibhor R1 with router-id 1.1.1.1

R3

R3#conf ter

Enter configuration commands, one per line.  End with CNTL/Z.

R3(config)#inter ser 1/0

R3(config-if)#ipv

R3(config-if)#ipv6 osp

R3(config-if)#ipv6 ospf 1 area

R3(config-if)#ipv6 ospf 1 area  1

R3(config-if)#

*Mar  1 01:10:03.855: %OSPFv3-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Serial1/0 from LOADING to FULL, Loading Done

R3(config-if)#

For R3 adjacency formed neighbor relationship with router R2 router-ir 2.2.2.2 through serial interface 

Verification Commands

R3#ping 2000:11aa::1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 2000:11AA::1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 16/23/36 ms

R3#sho ipv

R3#sho ipv6 route

R3#sho ipv6 route

IPv6 Routing Table - 8 entries

Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP

       U - Per-user Static route

       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary

       O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2

       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2

OI  2000:1122::/64 [110/65]

     via FE80::CE02:24FF:FE7C:0, Serial1/0

OI  2000:11AA::/64 [110/66]

     via FE80::CE02:24FF:FE7C:0, Serial1/0

C   2000:2233::/64 [0/0]

     via ::, Serial1/0

L   2000:2233::3/128 [0/0]

     via ::, Serial1/0

C   2000:33AA::/64 [0/0]

     via ::, FastEthernet0/0

L   2000:33AA::3/128 [0/0]

     via ::, FastEthernet0/0

L   FE80::/10 [0/0]

     via ::, Null0

L   FF00::/8 [0/0]

     via ::, Null0

R3#

R3#show ipv6 interface brief 

FastEthernet0/0            [up/up]

    FE80::CE03:16FF:FE24:0

    2000:33AA::3

Serial1/0                  [up/up]

    FE80::CE03:16FF:FE24:0

    2000:2233::3

Serial1/1                  [administratively down/down]

    unassigned

Serial1/2                  [administratively down/down]

    unassigned

Serial1/3                  [administratively down/down]

    unassigned

FastEthernet2/0            [administratively down/down]

    unassigned

FastEthernet3/0            [administratively down/down]

    unassigned

Loopback0                  [up/up]

    unassigned

R3#

R3#traceroute 2000:11aa::1

Type escape sequence to abort.

Tracing the route to 2000:11AA::1

  1 2000:2233::2 4 msec 24 msec 20 msec

  2 2000:11AA::1 20 msec 24 msec 16 msec

R3#

R3#show ipv6 ospf neighbor                                          

Neighbor ID     Pri   State           Dead Time   Interface ID    Interface

2.2.2.2           1   FULL/  -        00:00:35    5               Serial1/0

R3#

R3#show ipv6 ospf interface serial 1/0

Serial1/0 is up, line protocol is up 

  Link Local Address FE80::CE03:16FF:FE24:0, Interface ID 5

  Area 1, Process ID 1, Instance ID 0, Router ID 3.3.3.3

  Network Type POINT_TO_POINT, Cost: 64

  Transmit Delay is 1 sec, State POINT_TO_POINT, Cost: 64

  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

    Hello due in 00:00:03

  Index 1/1/1, flood queue length 0

  Next 0x0(0)/0x0(0)/0x0(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 2.2.2.2

  Suppress hello for 0 neighbor(s)

R3#

R3#sho ipv6 protocols 

IPv6 Routing Protocol is "connected"

IPv6 Routing Protocol is "static"

IPv6 Routing Protocol is "ospf 1"

  Interfaces (Area 1):

    Serial1/0

  Redistribution:

    None

R3#

R3#show ipv6 cef 

2000:1122::/64

     nexthop FE80::CE02:24FF:FE7C:0 Serial1/0 

2000:11AA::/64

     nexthop FE80::CE02:24FF:FE7C:0 Serial1/0 

2000:2233::3/128

  Receive

2000:2233::/64

     attached to Serial1/0 

2000:33AA::3/128

  Receive

2000:33AA::/64

     attached to FastEthernet0/0 

FE80::/10

  Receive

FF00::/8

  Receive

R3#