option

Use option to configure a self-defined DHCPv6 option in a DHCPv6 address pool.

Use undo option to remove a self-defined DHCPv6 option from a DHCPv6 address pool.

Syntax

option code hex hex-string

undo option code

Default

No self-defined DHCPv6 option is configured in a DHCPv6 address pool.

Views

DHCPv6 address pool view

DHCPv6 option group view

Predefined user roles

network-admin

mdc-admin

Parameters

code: Specifies a number for the self-defined option, in the range of 21 to 65535, excluding 25 through 26, 37 through 40, and 43 through 48.

hex hex-string: Specifies the content of the option, a hexadecimal number whose length is an even number in the range of 2 to 256.

Usage guidelines

The DHCPv6 server fills the self-defined option with the specified hexadecimal number and sends it in a response to the client.

You can self-define options for the following purposes:

If a DHCPv6 option is specified by both the dedicated command and the option command, the DHCPv6 server preferentially assigns the content specified by the dedicated command. For example, if a DNS server address is specified by the dns-server command and the option 23 command, the server uses the address specified by dns-server command.

If you execute this command multiple times with the same code specified, the most recent configuration takes effect.

Examples

# Configure Option 23 that specifies a DNS server address 2001:f3e0::1 in DHCPv6 address pool 1.

<Sysname> system-view
[Sysname] ipv6 dhcp pool 1
[Sysname-dhcp6-pool-1] option 23 hex 2001f3e0000000000000000000000001

Related commands

display ipv6 dhcp pool

dns-server

domain-name

sip-server