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Chapter 27
| IP Interface Commands
IPv6 Interface
ipv6 address
Related Commands
ip route (803)
show ip route (805)
ip default-gateway (746)
This command configures an IPv6 global unicast address and enables IPv6 on an
interface. Use the no form without any arguments to remove all IPv6 addresses
from the interface, or use the no form with a specific IPv6 address to remove that
address from the interface.
Syntax
[no] ipv6 address ipv6-address[/prefix-length]
ipv6-address - A full IPv6 address including the network prefix and host
address bits.
prefix-length - A decimal value indicating how many contiguous bits (from
the left) of the address comprise the prefix (i.e., the network portion of the
address).
Default Setting
No IPv6 addresses are defined
Command Mode
Interface Configuration (VLAN)
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.
◆
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
– 756 –
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