DHCP message configuration

[mcb30]

(2013-05-16 07:37)Rickert Wrote:  I posted another question on SO (for richer representation): How iPXE sends DHCP message

The problem is, I want to modify iPXE so that it can request all options from DHCP server, because some options indicate which environment (we have multiple server environments) iPXE is in. I need to identify the environment because init scripts need such information. Currently, retrieving DHCP options is the only way to identify the environment used by the network init script.

Answering your StackOverflow question here:

I would strongly recommend that you do not under any circumstances use cached DHCP settings from the OEM PXE stack's DHCP request. Allow iPXE to make its own DHCP request, and it should request everything that might be relevant.

If you see "DHCP (net0 52:54:00:12:34:56)... using cached" then you are using cached DHCP settings. This is a Bad Thing.

If you are currently using undionly.kkpxe, try switching to undionly.kpxe or to ipxe.pxe.

Michael