ipv6 nd dad attempts

Configures the number of consecutive neighbor solicitation messages that duplicate address detection (DAD) sends on an interface.

Syntax

ipv6 nd dad attempts number
no ipv6 nd dad attempts number

Command Default

By default, duplicate address detection sends three neighbor solicitation messages without any follow-up messages.

Parameters

number
Specifies the number of consecutive neighbor solicitation messages that duplicate address detection sends on an interface. Valid values are 0 to 255. The default value is 3. Configuring a value of 0 disables duplicate address detection processing on the specified interface.

Modes

Interface configuration mode

Usage Guidelines

DAD is not currently supported with IPv6 tunnels. Make sure tunnel endpoints do not have duplicate IP addresses.

The no form of the command restores the number of messages to the default value of 3.

Examples

The following example configures the number of consecutive neighbor solicitation messages that duplicate address detection sends on an interface to 100. 

device(config)# interface ethernet 1/3/1
device(config-if-e1000-1/3/1)# ipv6 nd dad attempts 2