Configuration guidelines
When you configure VLAN interfaces, follow these guidelines:
•A link-local address is automatically generated for an IPv6 VLAN interface after an IPv6 site-local address or global unicast address is configured for the VLAN interface. This generated link-local address is the same as the one generated in the Auto mode. If a manually assigned link-local address is available, the manually assigned one takes effect. After the manually assigned link-local address is removed, the automatically generated one takes effect.
•For an IPv6 VLAN interface whose IPv6 link-local address is generated automatically after you assign an IPv6 site-local address or global unicast address, removing the IPv6 site-local address or global unicast address also removes the generated IPv6 link-local address.
•For IPv6 link-local address configuration, manual assignment takes precedence over automatic generation. 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 the interface is still the manually assigned one. However, if you remove the manually assigned one, the one automatically generated takes effect.
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