run ipv6 dad

run ipv6 dad [{vlan} vlan_name | {{vr} vr_name} ipaddress]


Runs the DAD check on the specified IPv6 interface for which the DAD feature is enabled.

Syntax Description

vlan_name Specifies a VLAN (Virtual LAN) on which to run the test.
vr_name Specifies a VR on which to run the test.
ipaddress Specifies an IPv6 address for which to run the test.


If you do not specify a VR or VRF, the command applies to the current VR context.

Usage Guidelines

To run the test, you must specify a VLAN name or a specific IPv6 address. To support the test, the DAD feature must be enabled on the parent VR for the specified VLAN or IPv6 interface.

This command is ignored for the following conditions:
  • The specified IP address is in tentative state.
  • DAD is configured to be off.
  • The host VLAN is disabled.
  • Loopback mode is enabled on the host VLAN.
  • DAD is already running due to interface initialization or a previous issue of this command.
  • The host VLAN belongs to virtual router VR-Mgmt.

If a duplicate address is detected during the test, the event is logged and the address remains valid if it was already valid. If the address was not already valid, the event is logged and the duplicate address transitions to duplicate state. If no duplicate IPv6 address is detected, the specified IPv6 interface transitions to or remains in the up state.


The following example runs the DAD check on the IPv6 interfaces in VLAN "vlan1":

run ipv6 dad vlan1


This command was first available in ExtremeXOS 12.6.

Platform Availability

This command is available on the Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X620, X690, X870 series switches.