Configuring a link-local IPv6 address as a system-wide address for a switch
To enable IPv6 and automatically configure a global interface enter commands such as the following.
device(config)# ipv6 enable
This command enables IPv6 on the switch and specifies that the interface is assigned an automatically computed link-local address.
To override a link-local address that is automatically computed for the global interface with a manually configured address, enter a command such as the following.
device(config)# ipv6 address FE80::240:D0FF:FE48:4672 link-local
This command explicitly configures the link-local address FE80::240:D0FF:FE48:4672 for the global interface.
You must specify the ipv6-address parameter in hexadecimal using 16-bit values between colons as documented in RFC 2373.
The link-local keyword indicates that the router interface should use the manually configured link-local address instead of the automatically computed link-local address.