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IPv6 Interface Commands
60-6
60
ipv6 address autoconfig
This command enables stateless autoconfiguration of IPv6 addresses on an
interface and enables IPv6 on the interface. The network portion of the address is
based on prefixes received in IPv6 router advertisement messages; the host portion
in based on the modified EUI-64 form of the interface identifier (i.e., the switch’s
MAC address). Use the no form to remove the address generated by this command.
Syntax
[no] ipv6 address autoconfig
Default Setting
No IPv6 addresses are defined
Command Mode
Interface Configuration (VLAN)
Command Usage
• If a link local address has not yet been assigned to this interface, this
command will dynamically generate a global unicast address and a link local
address for the interface. (The link-local address is made with an address
prefix of FE80 and a host portion based the switch’s MAC address in modified
EUI-64 format.)
• If a duplicate address is detected, a warning message is sent to the console.
• If the router advertisements have the “other stateful configuration” flag set, the
switch will attempt to acquire other non-address configuration information
(such as a default gateway).
Example
This example assigns two dynamic global unicast address of
2005::212:CFFF:FE0B:4600 and 3FFE:501:FFFF:100:212:CFFF:FE0B:4600 to the
switch.
Console(config-if)#ipv6 address autoconfig
Console(config-if)#end
Console#show ipv6 interface
Vlan 1 is up
IPv6 is enable.
Link-local address:
FE80::212:CFFF:FE0B:4600/64
Global unicast address(es):
2005::212:CFFF:FE0B:4600, subnet is 2005:0:0:0::/64
3FFE:501:FFFF:100:212:CFFF:FE0B:4600, subnet is 3FFE:501:FFFF:100::/64
Joined group address(es):
FF01::1/16
FF02::1/16
FF02::1:FF0B:4600/104
MTU is 1500 bytes.
ND DAD is enabled, number of DAD attempts: 1.
ND retransmit interval is 1000 milliseconds
Console#