ipv6 nd dad attempts

ipv6 nd dad attempts

This command configures the number of duplicate address detection (DAD) attempts made on the interface when configuring IPv6 unicast addresses.

Syntax

ipv6 nd dad attempts number no ipv6 nd dad attempts

Parameters

number

Specifies the number of consecutive Neighbor Solicitation message

 

transmitted on the interface, when Duplicate Address Detection (DAD)

 

is performed on a unicast IPv6 address assigned to the interface.

 

The value can range from 0 to 600. A value of 0 disables Duplicate

 

Address Detection on the interface. A value of 1, which is the default,

 

specifies a single transmission with no follow‐up transmissions.

 

 

Defaults

Duplicate address detection enabled, for 1 attempt.

Mode

Router interface configuration: C3(su)‐>router(Config‐if(Vlan 1))#

Usage

IPv6 Duplicate Address Detection is described in RFC 2462. Duplicate Address Detection uses Neighbor Solicitation and Neighbor Advertisement messages to verify the uniqueness of an address. Duplicate Address Detection must be performed on unicast addresses prior to assigning them to an interface. An address remains in a tentative state while Duplicate Address Detection is being performed. If a tentative address is found to be a duplicate, an error message is returned and the address is not assigned to the interface.

Use this command to change the number of Neighbor Solicitation messages that can be sent for Duplicate Address Detection from the default value of 1. The no form of the command returns the value to the default of 1. A value of 0 disables Duplicate Address Detection on the interface.

The show ipv6 interface command displays the current DAD attempt setting.

Example

This example changes the number of consecutive Neighbor Solicitation messages sent for DAD to 3 on this interface.

C3(su)->router(Config-if(Vlan 1))# ipv6 nd dad attempts 3

ipv6 nd ns-interval

This command configures the interval between Neighbor Solicitations sent on an interface.

Syntax

ipv6 nd ns-interval {msec 0} no ipv6 nd ns-interval

SecureStack C3 Configuration Guide 22-15

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Enterasys Networks 9034313-07 manual Ipv6 nd dad attempts, Ipv6 nd ns-interval