[CentOS] CentOS 6 and pxeboot

Tue Apr 11 16:21:12 UTC 2017
m.roth at 5-cent.us <m.roth at 5-cent.us>

Hi, folks,

   We've been using pxeboot to pull up a menu, to build or rebuild
machines for years. We have this new server, and it fails. Times out.
What's happening is that it tries in this order

The first are MAC addresses, etc. I want it to pull default. It takes
*minutes* to time out each option, so after a dozen or 15 min, when it
gets to defaul, tftp has timed it out.

Now, our dhcpd config has this for pxeboot:
        allow booting;
        allow bootp;
        filename "gpxelinux.0";
        option-209 =  "pxelinux.cfg/default";
        option subnet-mask;
        option routers  <our router>;
        default-lease-time 172800; # 2 days.
        max-lease-time 432000; # 5 days.

I added that option-209, but it didn't take. I've been looking at the
docs, but if someone's can tell me off the top of their head what I need
to do, I'd appreciate it. This has become a high priority today....