ipv6 nd dad timeout

Function

The ipv6 nd dad timeout command sets a timeout period for duplicate address detection (DAD) messages.

The undo ipv6 nd dad timeout command restores the default timeout period for DAD messages.

The default timeout period is 1 second for DAD messages.

Format

ipv6 nd dad timeout value

undo ipv6 nd dad timeout

undo ipv6 nd dad timeout value

Parameters

Parameter	Description	Value
value	Specifies a timeout period for DAD messages.	The value is an integer ranging from 1 to 60, in seconds.

Parameter

Description

Value

value

Specifies a timeout period for DAD messages.

The value is an integer ranging from 1 to 60, in seconds.

Views

100ge sub-interface view, 10GE sub-interface view, 200GE sub-interface view, 25GE sub-interface view, 400GE sub-interface view, 40GE sub-interface view, 50GE sub-interface view, Eth-Trunk sub-interface view, GE sub-interface view, Global VE sub-interface view, PW-VE sub-interface view, VE sub-interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
nd	write

Usage Guidelines

Usage Scenario

If many VLANs are configured on a VLAN tag termination sub-interface, DAD messages may fail to be transmitted within the default timeout period (1s). To resolve this issue, run the ipv6 nd dad timeout command to prolong the timeout period for DAD messages.

Prerequisites

IPv6 has been enabled using the ipv6 enable command in the interface view.

Example

# Set a timeout period to 20 seconds for DAD messages.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/3.1
[~HUAWEI-Ethernet0/1/3.1] encapsulation dot1q-termination
[*HUAWEI-Ethernet0/1/3.1] ipv6 enable
[*HUAWEI-Ethernet0/1/3.1] ipv6 nd dad timeout 20