IPV6 Configuration in Gns3:

IPV6 OSPF Configuration on Gns3:

This is the simple IPV6 tutorial for configuring IPV6 and OSPF for IPV6 on Gns3.  You must enable IPV6 routing on router by using command “ipv6 unicast-routing”, all other command are same like normal IP configuration but just replace IP with IPV6 in all commands. I use the c7200 IOS for this lab. Configure the topology as below:

R1 Configuration:
R1(config)#  ipv6 unicast-routing
R1(config)#  ipv6 router ospf 1
 R1(config-router)#  router-id
R1(config-router)# exit
R1(config-if)#  interface Loopback1
R1(config-if)#  ipv6 address 2001:211:10:1::1/64
 R1(config-if)#  ipv6 ospf 1 area 0
R1(config-if)#  interface Serial1/0
R1(config-if)#  ipv6 address 2001:210:10:1::2/64
R1(config-if)#  ipv6 ospf 1 area 0

R2 Configuration:

R2(config)#  ipv6 unicast-routing
R2(config)#  ipv6 router ospf 1
 R2(config-router)#  router-id
R2(config-router)# exit
R2(config-if)#  interface Loopback1
R2(config-if)#  ipv6 address 2001:211:10:1::2/64
 R2(config-if)#  ipv6 ospf 1 area 0
R2(config-if)#  interface Serial1/0
R2(config-if)#  ipv6 address 2001:210:10:1::1/64
R2(config-if)#  ipv6 ospf 1 area 0

IPV6 Verification Commands:
R# show ipv6 route
R# SHOW ipv6 interface brief
R# SHOW ipv6 ospf 1 neighbor


  1. in my gns3 ipv6 is not supporting....what may be the reason????

    1. Make sure you have enabled IPv6 routing by following command:
      R1(config)# ipv6 unicast-routing
      still if you are unable to run IPv6 then you need some updated IOS with IPv6 features mostly i have tried 7200 series IOS for IPv6 you can download IOS for GNs3 from this link,,!

  2. Excellent example for star to understand IPV6 configuration.

  3. getting this things internet protocol disable
    how can fix it

    R1#show ip int
    R1#show ip interface lo
    R1#show ip interface loopback 0
    Loopback0 is up, line protocol is up
    Internet protocol processing disabled

  4. after the command "R1(config-if)# ipv6 ospf 1 area 0" it saying "OSPFv3: No IPV6 enabled on this interface". what to do? as its not taking cmmnds aftr this note

    1. Enable the IPv6 routing by using command "ipv6 unicast-routing" then i think you dont have assign any IPV6 address to interface..first assign IPv6 address to that interface..

  5. good text, I have first time using GNS3 on configuring ipv6 based.

  6. show ipv6 ospf 1 neighbor command isnt returning anything. What will my mistake be?