CLI Reference Guide-R01

Chapter 30 | IP Interface Commands
IPv6 Interface
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Command Usage
◆ All IPv6 addresses must be 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.
◆ To connect to a larger network with multiple subnets, you must configure a
global unicast address. This address can be manually configured with this
command, or it can be automatically configured using the ipv6 address
autoconfig command.
◆ If a link-local address has not yet been assigned to this interface, this command
will assign the specified static global unicast address and also dynamically
generate a link-local unicast 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.
Example
This example specifies a full IPv6 address and prefix length.
Console(config)#interface vlan 1
Console(config-if)#ipv6 address 2001:DB8:2222:7272::72/96
Console(config-if)#end
Console#show ipv6 interface
VLAN 1 is up
IPv6 is enabled
Link-local address:
fe80::7272:cfff:fe83:3466%1/64
Global unicast address(es):
2001:db8:2222:7272::72/96, subnet is 2001:db8:2222:7272::/96
Joined group address(es):
ff02::1:ff00:72
ff02::1:ff83:3466
ff02::1
IPv6 link MTU is 1500 bytes
ND DAD is enabled, number of DAD attempts: 3.
ND retransmit interval is 1000 milliseconds
ND advertised retransmit interval is 0 milliseconds
ND reachable time is 30000 milliseconds
ND advertised reachable time is 0 milliseconds
ND advertised router lifetime is 1800 seconds
Console#
Related Commands
ipv6 address eui-64 (825)
ipv6 address autoconfig (823)
show ipv6 interface (830)
ip address (808)