System information

Command Line Interface
4-234
4
• You can configure multiple IPv6 global unicast addresses per interface, but
only one link-local address per interface.
• If a duplicate address is detected, a warning message is sent to the console.
Example
This example assigns a link-local address of FE80::269:3EF9:FE19:6779 to
VLAN 1. Note that the prefix FE80 is required for link-local addresses, and the first
16-bit group in the host address is padded with a zero in the form 0269.
Related Commands
ipv6 enable (4-226)
show ipv6 interface (4-234)
show ipv6 interface
This command displays the usability and configured settings for IPv6 interfaces.
Syntax
show ipv6 interface [brief [vlan vlan-id [ipv6-prefix/prefix-length]]]
• brief - Displays a brief summary of IPv6 operational status and the
addresses configured for each interface.
• vlan-id - VLAN ID (Range: 1-4093)
• ipv6-prefix - The IPv6 network portion of the address assigned to the
interface. The prefix must be formatted according to RFC 2373 “IPv6
Addressing Architecture,” using 8 colon-separated 16-bit hexadecimal
values. One double colon may be used in the address to indicate the
appropriate number of zeros required to fill the undefined fields.
• prefix-length - A decimal value indicating how many of the contiguous bits
(from the left) of the address comprise the prefix (i.e., the network portion
of the address).
Command Mode
Normal Exec, Privileged Exec
Console(config)#interface vlan 1
Console(config-if)#ipv6 address 2001:0DB8:0:1::/64 eui-64
Console(config-if)#end
Console#show ipv6 interface
Vlan 1 is up
IPv6 is enable.
Link-local address:
FE80::269:3EF9:FE19:6779/64
Global unicast address(es):
2001:DB8::1:200:E8FF:FE90:0, subnet is 2001:DB8:0:1::/64
Joined group address(es):
FF01::1/16
FF02::1/16
FF02::1:FF19:6779/104
MTU is 1500 bytes.
ND DAD is enabled, number of DAD attempts: 1.
ND retransmit interval is 1000 milliseconds
Console#