How to pass a vendor-specific options to a DHCP server using dhclient?

Question

I am trying to configure dhclient. The specification says that I should add vendor-specific options in every DHCP request/solicitation.

I've found only -V option.

-V Specify the vendor-class-identifier option to send to the DHCP server.

I am not sure that is what I need.

I saw that some options can be setted in dhclient.cfg, but honestly I didn't get at all how I can do this. :( As I understand there is some "language" but I can't find helpful description or examples.

Can somebody help me with this?

Answer 1

It's documented reasonably well in the dhcp-options man page.

For example:

option space ISC code width 1 length width 1 hash size 3;
option ISC.sample code 1 = text;
option vendor.ISC code 2495 = encapsulate vivso-sample;
option vendor-class.ISC code 2495 = text;

option ISC.sample "configuration text here";
option vendor-class.ISC "vendor class here";