H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv6 Configuration
H3C S7500E Series Ethernet Switches Chapter 1 IPv6 Basics Configuration
1-14
 Note:
z After an IPv6 site-local address or aggregatable 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. If a link-local address is
manually assigned to an interface, this link-local address takes effect. If the
manually assigned link-local address is removed, the automatically generated
link-local address takes effect.
z 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 you delete the manually
assigned address, the automatically generated link-local address is validated.
z You need to execute the ipv6 address auto link-local command before the undo
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.
1.4 Configuring IPv6 NDP
1.4.1 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 neighbor
entry.
The device uniquely identifies a static neighbor entry according to the IPv6 address and
the layer 3 interface ID. Currently, there are two configuration methods:
z Configure an IPv6 address and link-layer address for a Layer 3 interface.
z Configure an IPv6 address and link-layer address for a port in a VLAN.
Follow these steps to configure a static neighbor entry: