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How to Configure IPv6 on CISCO Router?

Last Updated : 23 Jul, 2025

An IPv6 is the sixth version of any IP address on the IP protocol. It consists of eight groups of four hexadecimal digits. IP v6 is a 128-bits address having an address space of 2^128. 

For more details about IPv6 refer to the articles: What is IPv6? and Internet Protocol version 6 (IPv6).

Steps to Configure IPv6 on Cisco Packets Tracer:

Step 1: First open the Cisco packet tracer desktop and create a network topology something like the image and an IPv6 addressing table given below.

S.NODevice NameModel-NameLink-Local-AddressDefault-Gateway
1.PCPCFE80::207:ECFF:FEA3:EB56FE80::1
2.SwitchPT-switchFE80::207:ECFF:FEB9:862AFE80::1
3.Router2911FE80::250:FFF:FE6C:B21FE80::1
4.cableAutomatic connecting cablenilnil
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IP Addressing Table:

S.NOInterfaceIPv6 Address
1.Gig0/02001:DB:AAAA:A::1/64
2.Gig0/12001:DB:AAAA:B::1/64

Step 2: Configuring the  GigabitEthernet Interfaces.

  •  First, we will configure the GigabitEthernet0/0 using CLI.
  • Click on router0 and go to CLI and type the commands are given below:
Router>en
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#ipv6 unicast-routing
Router(config)#int Gig0/0
Router(config-if)#ipv6 address FE80::1 link
Router(config-if)#ipv6 address FE80::1 link-local
Router(config-if)#no shut
  • Now we will configure the GigabitEthernet0/1 Interface.
  • Click on router0 and go to CLI and type the commands are given below:
Router(config-if)#int Gig0/1
Router(config-if)#ipv6 address FE80::1 link-local
Router(config-if)#no shut
  • Then, both the interfaces will be active now:
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Step 3: Configuring Ipv6 address in both Interfaces using CLI:

  • CLI commands to configure IPv6 address in GigabitEthernet0/0 and GigabitEthernet0/1 ports are given below:
Router#en
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int Gig0/0
Router(config-if)#ipv6 address 2001:DB8:AAAA:A::1/64
Router(config-if)#no shut
Router(config-if)#int Gig0/1
Router(config-if)#ipv6 address 2001:DB8:AAAA:B::1/64
Router(config-if)#no shut
Router(config-if)#
Router(config-if)#
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Step 4: We have configured the router now change the settings of hosts in IPv6 configuration:

  • First, click on PC0 and go to desktop then IP configuration.
  • Now find the IPv6 configuration.
  • Change the settings from static to automatic and then after a few seconds, the IPv6 address and default gateway are displayed.
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  • Similarly, repeat this procedure with PC1 and PC2
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Step 5: Now we have to verify the connection by pinging the IPv6 address of PC0 in PC1.

  • First, click on PC1 and go to the command prompt, and type ping <ipv6 address>
command: ping 2001:DB8:AAAA:A:20D:BDFF:FE1A:D121
  • As we can see in the below image, getting replies from PC0 means the connection is established successfully.
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Simulation Result:


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