Simple OSPFv3 on Cisco Router

OSPFv3 is designed to use in IPv6 protocol. It has the same fundamental mechanisme just like OSPFv2 on IPv4. In this article, we will configure simple OSPFv3 using 2 cisco router.  Note that, before we enable OSPFv3 on cisco router, we need  to enable IPv6 unicast-routing and  enable IPv6 on the interface.  

Here is the configs of our router:


Router R1:

1:  !  
2:  ipv6 unicast-routing  
3:  !  
4:  interface Loopback0  
5:   no ip address  
6:   ipv6 address 2001:100:100:1::1/64  
7:  !  
8:  interface FastEthernet0/0  
9:   no ip address  
10:   duplex auto  
11:   speed auto  
12:   ipv6 address 2001:100:100:100::1/126  
13:   ipv6 ospf 10 area 0  
14:  !  
15:  ipv6 router ospf 10  
16:   router-id 1.1.1.1  
17:   log-adjacency-changes  
18:   redistribute connected  
19:  !  

Router R2:

1:  !  
2:  ipv6 unicast-routing  
3:  !  
4:  interface Loopback0  
5:   no ip address  
6:   ipv6 address 2001:100:100:2::1/64  
7:  !  
8:  interface FastEthernet0/0  
9:   no ip address  
10:   duplex auto  
11:   speed auto  
12:   ipv6 address 2001:100:100:100::2/126  
13:   ipv6 ospf 10 area 0  
14:  !  
15:  ipv6 router ospf 10  
16:   router-id 2.2.2.2  
17:   log-adjacency-changes  
18:   redistribute connected  
19:  !  

Ping your router to make sure that link from router R1 to R2 is OK.

1:  R1#ping 2001:100:100:100::2  
2:  Type escape sequence to abort.  
3:  Sending 5, 100-byte ICMP Echos to 2001:100:100:100::2, timeout is 2 seconds:  
4:  !!!!!  
5:  Success rate is 100 percent (5/5), round-trip min/avg/max = 8/16/32 ms  

Now use command 'show ipv6 ospf neighbor' to check whether OSPFv3was established or not.

1:  R1#sh ipv6 ospf neighbor  
2:  Neighbor ID   Pri  State      Dead Time  Interface ID  Interface  
3:  2.2.2.2      1  FULL/DR     00:00:33  4        FastEthernet0/0  

Then check what prefix you have from router R2:

1:  R1#sh ipv6 route  
2:  IPv6 Routing Table - 7 entries  
3:  Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP  
4:      U - Per-user Static route  
5:      I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary  
6:      O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2  
7:      ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2  
8:  C  2001:100:100:1::/64 [0/0]  
9:     via ::, Loopback0  
10:  L  2001:100:100:1::1/128 [0/0]  
11:     via ::, Loopback0  
12:  OE2 2001:100:100:2::/64 [110/20] 
13:     via FE80::C800:14FF:FE02:8, FastEthernet0/0  
14:  C  2001:100:100:100::/126 [0/0]  
15:     via ::, FastEthernet0/0  
16:  L  2001:100:100:100::1/128 [0/0]  
17:     via ::, FastEthernet0/0  
18:  L  FE80::/10 [0/0]  
19:     via ::, Null0  
20:  L  FF00::/8 [0/0]  
21:     via ::, Null0