Enabling IPv6 with an automatically configured link-local address


ipv6 enable

no ipv6 enable

If IPv6 has not already been enabled on a VLAN by another IPv6 command option described in this chapter, this command enables IPv6 and automatically configures the VLAN link-local unicast address with a 64-bit EUI-64 interface identifier


Only one link-local IPv6 address is allowed on the VLAN interface. Subsequent static or DHCP configuration of another link-local address overwrites the existing link-local address.

A link-local address always uses the prefix fe80:0:0:0.

With IPv6 enabled, the VLAN uses received RAs to designate the default IPv6 router. See Default IPv6 router.

After verification of uniqueness by DAD, a link-local IPv6 address assigned automatically is set to the preferred status, with a "permanent" lifetime.

Default: Disabled

If no other IPv6-enabling command is configured on the VLAN, the no form of the command disables IPv6 on the VLAN. See Disabling IPv6 on a VLAN.