DHCP passing options/variables to iPXE

[mcb30]

(2012-08-08 11:46)jpwise Wrote:  As I understand it, the scriptlet may actually have to point to a proper ipxe script, but if i break the boot sequence with CTRL-B after the initial undionly.kpxe load, and go into config the scriptlet variable still shows as as <not specified>. Likewise if i let it boot normally to the menu and then go into the config no change. I also tried using some other option variables with the same results.

Firstly, you'll need to issue a new DHCP request from within iPXE before going into config.

Secondly, the scriptlet variable is intended to contain a sequence of iPXE commands: it's an alternative to using an embedded image. It's not relevant to your situation. Use the site-local DHCP options (128-135) instead, e.g.:

Code:

option site-local-128 code 128 = string;

option site-local-128 "http://server.address.com";

and then

Code:

iPXE> dhcp
iPXE> echo ${128:string}

Michael