dhcp client identifier

Use dhcp client identifier to configure a DHCP client ID for an interface.

Use undo dhcp client identifier to restore the default.

Syntax

dhcp client identifier { ascii ascii-string | hex hex-string | mac interface-type interface-number }

undo dhcp client identifier

Default

An interface generates the DHCP client ID based on its MAC address. If the interface has no MAC address, it uses the MAC address of the first Ethernet interface to generate its client ID.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ascii ascii-string: Specifies a case-sensitive ASCII string of 1 to 63 characters as the client ID.

hex hex-string: Specifies a hexadecimal number of 4 to 64 characters as the client ID.

mac interface-type interface-number: Uses the MAC address of the specified interface as a DHCP client ID. The interface-type interface-number argument specifies an interface by its type and number.

Usage guidelines

A DHCP client ID is added to the DHCP option 61. A DHCP server can specify IP addresses for clients based on the DHCP client ID. You can specify a DHCP client ID by performing one of the following operations:

• Naming an ASCII string or hexadecimal number as the client ID.

• Using the MAC address of an interface to generate a client ID.

Whichever method you use, make sure the IDs for different DHCP clients are unique.

Examples

# Use a hexadecimal number of FFFFFFFF as the client ID for VLAN-interface 10.

<Sysname> system-view
[Sysname] interface vlan-interface 10
[Sysname-Vlan-interface10] dhcp client identifier hex FFFFFFFF

Related commands

display dhcp client