Basic configuration IPv6 Cisco IOS

Enabling IPv6 Globally

Start the IPv6 routing process and allow IPv6 CEF switching.

Router(config)#<input>ipv6 unicast-routing</input>
Router(config)#<input>ipv6 cef</input>

Configuring IPv6 address on interface

R3(config)#<input>int fa0/0</input>
R3(config-if)#<input>ipv6 enable</input>
R3(config-if)#<input>ipv6 address 2001:16D8:DD85:139::7/64</input>

Showing IPv6 configuration on interface

R3#<input>show ipv6 int fa0/0</input>
FastEthernet0/0 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::128C:CFFF:FE2E:916E
  No Virtual link-local address(es):
  Global unicast address(es):
    2001:16D8:DD85:139::7, subnet is 2001:16D8:DD85:139::/64
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::1:FF00:7
    FF02::1:FF2E:916E
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  ICMP unreachables are sent
  ND DAD is enabled, number of DAD attempts: 1
  ND reachable time is 30000 milliseconds (using 30000)
  ND advertised reachable time is 0 (unspecified)
  ND advertised retransmit interval is 0 (unspecified)
  ND router advertisements are sent every 200 seconds
  ND router advertisements live for 1800 seconds
  ND advertised default router preference is Medium
  Hosts use stateless autoconfig for addresses.