3Com 4510G Configuration Manual page 298

Manual assignment: IPv6 link-local addresses can be assigned manually.
Follow these steps to configure an IPv6 unicast address:
To do...
Enter system view
Enter interface view
Configure
an IPv6
Manually assign an
aggregatabl
IPv6 address
e global
unicast
address or
Adopt the EUI-64
site-local
format to form an
address
IPv6 address
Automatically
generate a link-local
address for the
Configure
interface
an IPv6
link-local
Manually assign a
address
link-local address for
the interface
After an IPv6 site-local address or aggregatable 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. If
a link-local address is manually assigned to an interface, this manual link-local address takes
effect. If the manually assigned link-local address is removed, the automatically generated
link-local address takes effect.
Manual assignment takes precedence over automatic generation. That is, if you first adopt
automatic generation and then manual assignment, the manually assigned link-local address will
overwrite the automatically generated one. If you first adopt 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 one. If you delete the manually
assigned address, the automatically generated link-local address is validated.
The undo ipv6 address auto link-local command can only remove the link-local addresses
generated through the ipv6 address auto link-local command. However, if an IPv6 site-local
address or aggregatable global unicast address is already configured for an interface, the
interface still has a link-local address because the system automatically generates one for the
interface. If no IPv6 site-local address or aggregatable global unicast address is configured, the
interface has no link-local address.
Use the command...
system-view
interface interface-type
interface-number
ipv6 address
{ ipv6-address
prefix-length |
ipv6-address/prefix-length
}
ipv6 address
ipv6-address/prefix-length
eui-64
ipv6 address auto
link-local
ipv6 address
ipv6-address link-local
13-11
Remarks
—
—
One of the two commands is
required.
By default, no site-local
address or aggregatable
global unicast address is
configured for an interface.
Optional
By default, after an IPv6
site-local address or
aggregatable global unicast
address is configured for an
interface, a link-local address
will be generated
automatically.