ipv6 address auto link-local
Syntax
ipv6 address auto link-local
undo ipv6 address auto link-local
View
Interface view
Default level
2: System level
Parameters
None
Description
Use ipv6 address auto link-local to automatically generate a link-local address for an interface.
Use undo ipv6 address auto link-local to remove the automatically generated link-local address for the interface.
By default, no link-local address is configured on an interface, and a link-local address will be automatically generated after a global IPv6 unicast address is configured for the interface.
After an IPv6 global unicast address is configured for an interface, a link-local address is generated automatically. The automatically generated link-local address is the same as the one generated by using the ipv6 address auto link-local command.
The undo ipv6 address auto link-local command can only remove the link-local addresses generated through the ipv6 address auto link-local command. After the undo ipv6 address auto link-local command is used on an interface that has an IPv6 global unicast address configured, the interface still has a link-local address. If the interface has no IPv6 global unicast address configured, it will have no link-local address.
Manual assignment takes precedence over automatic generation. If you first adopt automatic generation and then manual assignment, the manually assigned link-local address will overwrite the automatically generated address. If you first use manual assignment and then automatic generation, the automatically generated link-local address will not take effect and the link-local address of an interface is still the manually assigned address. If you delete the manually assigned address, the automatically generated link-local address is validated. For more information about manual assignment of an IPv6 link-local address, see the ipv6 address link-local command.
Examples
# Configure VLAN-interface 100 to automatically generate a link-local address.
<Sysname> system-view [Sysname] interface vlan-interface 100 [Sysname-Vlan-interface100] ipv6 address auto link-local