Operation Manual – IPv6 ConfigurationH3C S7500E Series Ethernet Switches Chapter 1 IPv6 Basics Configuration1-14Note:z After an IPv6 site-local address or aggregatable global unicast address isconfigured for an interface, a link-local address will be generated automatically. Theautomatically generated link-local address is the same as the one generated byusing the ipv6 address auto link-local command. If a link-local address ismanually assigned to an interface, this link-local address takes effect. If themanually assigned link-local address is removed, the automatically generatedlink-local address takes effect.z The manual assignment takes precedence over the automatic generation. That is, ifyou first adopt the automatic generation and then the manual assignment, themanually assigned link-local address will overwrite the automatically generated one.If you first adopt the manual assignment and then the automatic generation, theautomatically generated link-local address will not take effect and the link-localaddress of an interface is still the manually assigned one. If you delete the manuallyassigned address, the automatically generated link-local address is validated.z You need to execute the ipv6 address auto link-local command before the undoipv6 address auto link-local command. However, if an IPv6 site-local address oraggregatable global unicast address is already configured for an interface, theinterface still has a link-local address because the system automatically generatesone for the interface. If no IPv6 site-local address or aggregatable global unicastaddress is configured, the interface has no link-local address.1.4 Configuring IPv6 NDP1.4.1 Configuring a Static Neighbor EntryThe IPv6 address of a neighbor node can be resolved into a link-layer addressdynamically through NS and NA messages or through a manually configured neighborentry.The device uniquely identifies a static neighbor entry according to the IPv6 address andthe 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:
