ipv6 nd snooping dad retrans-timer

Use ipv6 nd snooping dad retrans-timer to set the interval for retransmitting an NS message for DAD.

Use undo ipv6 nd snooping dad retrans-timer to restore the default.

Syntax

ipv6 nd snooping dad retrans-timer interval

undo ipv6 nd snooping dad retrans-timer

Default

The interval for retransmitting an NS message for DAD is 250 milliseconds.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

interval: Specifies the interval for retransmitting an NS message for DAD, in the range of 100 to 500 milliseconds.

Usage guidelines

When creating, updating, or deleting an ND snooping entry, the device sends an NS message to test the entry by DAD. When both of the following conditions exist, the device retransmits an NS message:

• The device does not receive a reply within the retransmission interval.

• The retransmission interval is less than or equal to the timeout time for ND snooping entries in INVALID status (TENTATIVE, TESTING_TPLT, or TESTING_VP).

For the device to send the NS message only once, set a retransmission interval longer than the timeout time for ND snooping entries in INVALID status.

Example

# Set the interval to 200 milliseconds for retransmitting an NS message for DAD.

<Sysname> system-view
[Sysname] ipv6 nd snooping dad retrans-timer 200