ipv6 nd dad-attempts

Syntax

ipv6 nd dad-attempts 0 - 255

no ipv6 nd dad-attempts 0 - 255

Description

This command is executed at the global or per-interface config level, and configures the number of neighbor solicitations to send when performing DAD for a unicast address configured on a VLAN or tunnel interface. A per-interface configuration overrides a globally set configuration.

Specifiers

Default: 3 (enabled); 0 (disabled); Range: 0 - 255 (0 = disabled)

Options

0 - 255: The number of consecutive neighbor solicitation messages sent for DAD inquiries on an interface. Setting this value to 0 disables DAD on the interface, which bypasses checks for uniqueness on newly configured addresses. If a reboot is performed while DAD is disabled, the duplicate address check is not performed on any IPv6 addresses configured on the switch.
no: The no form of the command restores the default setting.

NOTE:

Software version K.14.xx supports a dad-attempts range of 0 to 600. However, software version K.15.xx or greater supports a range of 0 to 255. If dad-attempts is set higher than 255, updating from K.14.xx to K.15.xx or greater and rebooting truncates this value to 255. Similarly, if the switch is running version K.15.xx or greater: (1) downloading a configuration file created using version K.14.xx with dad-attempts set higher than 255 and then (2) rebooting the switch using this configuration file truncates the setting to 255.