H3C S5100-SI Operation Manual page 787

To do...
Manually assign an
IPv6 address
Configure an IPv6
global unicast
address or
site-local address
Adopt the EUI-64
format to form an
IPv6 address
Automatically
generate a
link-local address
Configure an IPv6
link-local address
Manually assign a
link-local address
for an interface.
IPv6 unicast addresses can be configured for only one VLAN interface on an H3C S5100-SI/EI
Ethernet switch. The total number of global unicast addresses and site-local addresses on the
VLAN interface can be up to four.
After an IPv6 site-local address or global unicast address is configured for an interface, a link-local
address will be 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 manual assignment takes precedence over the automatic generation. That is, if you first adopt
the automatic generation and then the manual assignment, the manually assigned link-local
address will overwrite the automatically generated one. If you first adopt the manual assignment
and then the 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 the manually
assigned link-local address is deleted, the automatically generated link-local address takes effect.
You must have carried out the ipv6 address auto link-local command before you carry out the
undo ipv6 address auto link-local command. However, if an IPv6 site-local address or 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
global unicast address is configured, the interface has no link-local address.
Use the command...
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
1-10
Remarks
Use either
command
By default, no
site-local address
or global unicast
address is
configured for an
interface.
Note that the prefix
specified by the
prefix-length
argument in an
EUI-64 address
cannot exceed 64
bits in length.
Optional
By default, after an
IPv6 site-local
address or global
unicast address is
configured for an
interface, a
link-local address
will be generated
automatically.