HP 6120XG HP ProCurve Series 6120 Blade Switches IPv6 Configuration Guide - Page 86

to be unique and is assigned to the interface., If a previously con d unicast address is changed

Page 86 highlights

IPv6 Addressing Configuration Duplicate Address Detection (DAD) ■ If a previously configured unicast address is changed, a neighbor advertisement is sent on the VLAN to notify other devices, and also for duplicate address detection. ■ If DAD is disabled when an address is configured, the address is assumed to be unique and is assigned to the interface. 4-21

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4-21
IPv6 Addressing Configuration
Duplicate Address Detection (DAD)
If a previously configured unicast address is changed, a neighbor adver-
tisement is sent on the VLAN to notify other devices, and also for duplicate
address detection.
If DAD is disabled when an address is configured, the address is assumed
to be unique and is assigned to the interface.