Creating User-Defined DHCP Options Not Included in the Default Junos Implementation of the DHCP Server
You can configure one or more user-defined options that are not included in the Junos default implementation of the DHCP server. For example, if a client requests a DHCP option that is not included in the DHCP server, you can create a user-defined option that enables the server to respond to the client’s request.
To configure a user-defined DHCP option, include the option statement:
The option statement specifies the following values:
- id-number—Any whole number. The ID number is used to index the option and must be unique across a DHCP server.
- option-type—Any of the following types: byte, byte-stream, flag, integer, ip-address, short, string, unsigned-integer, unsigned-short.
- array—An option can include an array of values.
- option-value—Value associated with an option. The option value must be compatible with the option type (for example, an On or Off value for a flag type).
You can include this statement at the following hierarchy levels:
The following example shows user-defined DHCP options:
User-defined options that conflict with DHCP configuration statements are ignored by the server. For example, in the following configuration, the DHCP server ignores the user-defined option 3 router statement and uses the router statement instead:
