Related Commands
interface (27-1)
ping ipv6 (41-25)
ipv6 enable
This command enables IPv6 on an interface that has not been configured with an
explicit IPv6 address. Use the no form to disa ble IPv6 o n an interface that has not
been configured with an explicit IPv6 address.
Syntax
[no] ipv6 enable
Default Setting
IPv6 is disabled
Command Mode
Interface Configuration (VLAN)
Command Usage
• This command enables IPv6 on the current VLAN interface and automatically
generates a link-local unicast address. The address prefix uses FE80, and the
host portion of the address is generat ed by conv erting th e router’s MAC
address to modified EUI-64 format (see page 41-12). This address type
makes the router accessible over IP v6 for all de vices att ached to the sa me
local subnet.
• If a duplicate address is detected on the local segment, this interface wi ll be
disabled and a warning message displayed on the con sole.
• The
no ipv6 enable
command does not disable IPv6 for an interface that has
been explicitly configured with an IPv6 address.
Example
In this example, IPv6 is enabled on VLA N 1, and the link-loc al address
FE80::200:E8FF:FE90:0/64 is automatically generated by the router.
Console(config)#interface vlan 1
Console(config-if)#ipv6 enable
Console(config-if)#end
Console#show ipv6 interface
Vlan 1 is up
IPv6 is enable.
Link-local address:
FE80::200:E8FF:FE90:0/64
Global unicast address(es):
Joined group address(es):
FF01::1/16
FF02::1/16
FF02::1:FF90:0/104
MTU is 1500 bytes.
ND DAD is enabled, number of DAD attempts: 1.
ND retransmit interval is 1000 milliseconds
Console#
41-7
Basic IP Configuration
41