dhcp client dad enable

Use dhcp client dad enable to enable duplicate address detection.

Use undo dhcp client dad enable to disable duplicate address detection.

Syntax

dhcp client dad enable

undo dhcp client dad enable

Default

Duplicate address detection is enabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

DHCP client detects IP address conflict through ARP packets. An attacker can act as the IP address owner to send an ARP reply. This makes the client unable to use the IP address assigned by the server. As a best practice, disable duplicate address detection when ARP attacks exist on the network.

Examples

# Disable the duplicate address.

<Sysname> system-view
[Sysname] undo dhcp client dad enable