HP 6120XG HP ProCurve Series 6120 Blade Switches IPv6 Configuration Guide - Page 77
Statically Configuring a Link-Local Unicast Address, preferred, perma
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IPv6 Addressing Configuration Configuring a Static IPv6 Address on a VLAN Statically Configuring a Link-Local Unicast Address Syntax: [no] ipv6 address fe80::< device-identifier > link-local ■ If IPv6 is not already enabled on the VLAN, this command enables IPv6 and configures a static link-local address. ■ If IPv6 is already enabled on the VLAN, then this command overwrites the current, link- local address with the specified static address. (One link-local address is allowed per VLAN interface.) < device-identifier >: The low-order 64 bits, in 16-bit blocks, comprise this value in a link-local address: xxxx xxxx : xxxx xxxx : xxxx xxxx : xxxx xxxx Where a static link-local address is already configured, a new, autoconfigured global unicast addresses assignment uses the same device identifier as the link-local address. Notes: An existing link-local address is replaced, and is not deprecated, when a static replacement is configured. The prefix for a statically configured link-local address is always 64 bits, with all blocks after fe80 set to zero. That is: fe80:0:0:0. After verification of uniqueness by DAD, a statically configured link-local address status is set to preferred, with a permanent lifetime. (Refer to "IPv6 Address Deprecation" on page 325.) For link-local addressing, the no form of the static IPv6 address command produces different results, depending on how IPv6 is configured on the VLAN: ■ If IPv6 was enabled only by a statically configured link- local address, then deleting the link-local address disables IPv6 on the VLAN. ■ If other IPv6-enabling commands have been configured on the VLAN, then deleting the statically configured link-local address causes the switch to replace it with the default (EUI-64) link-local address for the VLAN, and IPv6 remains enabled. (For more on the EUI-64 address format, refer to "Extended Unique Identifier (EUI)" on page 3-14.) Refer also to "Disabling IPv6 on a VLAN" on page 4-16. 4-12