Network problems attributed to WinPE loading and then automatically rebooting
Here's another great OSD related tip from Frank Rojas, a Senior Support Engineer in our Charlotte, NC office:
http://blogs.technet.com/smsandmom/archive/2008/08/26/configmgr-2007-osd-deployment-errors-out-within-a-few-seconds-after-winpe-loads-and-then-automatically-reboots.aspx