HP 2570p (no network with iPXE undionly.kpxe) but ipxe.lkrn is working.

[robinsmidsrod]

I would suggest you try a network trace (http://ipxe.org/howto/pcap) and see if you get additional data on the production network that is making iPXE confused. Some of the vendor PXE stacks are not very good at dealing with uncommon network configurations.

I suggest that you register on the mailing-list and discuss this inconsistency with the developers. I have the same Intel card on my desktop computer, and have had no issues with that one.

I have a tg3-based Broadcom card on my laptop, and that one has had some issues in the past, but it's now working without problems. You might've encountered a bug in this driver. If your Broadcom card uses the bnx2 driver then it is known to be not very stable. We've had a GSoC project to rewrite that driver. You can read more about it on http://ipxe.org/gsoc/bnx2 and git clone the repo and see if it works better for you on that particular hardware.

Don't forget to include the lspci -nn info if you post to the mailing-list.