H3C S5120-EI Series, Operation Manual

Page: 313 / 1191

1-11
To do... Use the command... Remarks
Automatically
generate a link-local
address for the
interface
ipv6 address auto
link-local
Configure
an IPv6
link-local
address
Manually assign a
link-local address for
the interface
ipv6 address
ipv6-address link-local
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.
z
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.
z
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.
z
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.
Configuring IPv6 NDP
Configuring a Static Neighbor Entry
The IPv6 address of a neighbor node can be resolved into a link-layer address dynamically through NS
and NA messages or through a manually configured static neighbor entry.
The device uniquely identifies a static neighbor entry according to the neighbor IPv6 address and the
local Layer 3 interface ID. Currently, there are two configuration methods:
z
Associate a neighbor IPv6 address and link-layer address with a Layer 3 interface.
z
Associate a neighbor IPv6 address and link-layer address with a port in a VLAN.