IPv6 Address Autoconfiguration and EUI-64 Addressing on Cisco Routers

Objective

Learn and understand how to configure IPv6 addresses on Cisco routers using address autoconfiguration and EUI-64 addressing.

Purpose

Configuring IPv6 addressing is a fundamental task for any Cisco engineer. You must be prepared to configure an IPv6 address using Stateless Address Autoconfiguration (SLAAC) and EUI-64 addressing.

Lab Topology

Use the following topology to complete this lab exercise:

Task 1: Configure Hostnames

Objective: Set hostnames on routers R1 and R3 as per the topology.

Configuration Steps:

Router#config t
Enter configuration commands, one per line. End with CTRL/Z.
Router(config)#hostname R1

Router#config t
Enter configuration commands, one per line. End with CTRL/Z.
Router(config)#hostname R3
R3(config)#

Task 2: Configure GigabitEthernet and Loopback Interfaces

Objective: Configure the IP addresses on the GigabitEthernet0/0 interfaces of R1 and R3 as illustrated in the topology. Configure the Loopback interfaces specified in the diagram on R3.

GigabitEthernet0/0 on R3 will use SLAAC to obtain the address prefix from R1.

Loopback0 will use EUI-64 to complete the host portion of the address.

Configuration Steps:

R1(config)#ipv6 unicast-routing
R1(config)#interface GigabitEthernet0/0
R1(config-if)#ipv6 address 2001:db8:1::1/64
R1(config-if)#no shutdown
R1(config-if)#end
R1#copy running-config startup-config


R3(config)#ipv6 unicast-routing
R3(config)#interface GigabitEthernet0/0
R3(config-if)#ipv6 address autoconfig
R3(config-if)#no shutdown
R3(config-if)#exit

R3(config)#interface lo0
R3(config-if)#ipv6 address 2001:aaaa:aaaa:aaaa::/64 eui-64
R3(config-if)#end
R3#copy running-config startup-config

Task 3: Verify Configuration

Objective: Use appropriate show commands to verify IPv6 configurations and interface statuses.

Verification Commands:

R3#show ipv6 interface g0/0
GigabitEthernet0/0 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::290:CFF:FE1A:2201
  No Virtual link-local address(es):
  Global unicast address(es):
    2001:DB8:1:0:290:CFF:FE1A:2201, subnet is 2001:DB8:1::/64 [CAL/PRE]
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::1:FF1A:2201
  MTU is 1500 bytes
  ICMP error messages

[Output Truncated]

R3#show ipv6 interface lo0
Loopback0 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::2E0:A3FF:FE94:D840
  No Virtual link-local address(es):
  Global unicast address(es):
    2001:AAAA:AAAA:AAAA:2E0:A3FF:FE94:D840, subnet is 2001:AAAA:AAAA:AAAA::/64 [EUI]
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::1:FF94:D840
  MTU is 1514 bytes

[Output Truncated]

Cisco Packet Tracer file:
Load and open the .pkt Lab file in Cisco Packet Tracer from here: IPv6_Address_Autoconfiguration.pkt