We have a problems using PXE to deploy operating systems. PXE only works some time after the WDS service has been restarted. Without restarting the WDS, boot stops like there was no task assigned to computer in case at all. WDS has to be restarted periodically again and again. OS deployment work well by configuration manager client agent, though. So, where should we look the problem causing this behaviour? PXE, SCCM and WDS are all on the same server (2008 R2 64-bit Std). DHCP service is located on ADDS server. Clients and the servers are on different subnets.

check the wds cache, The value is stored in HKLM\Software\Microsoft\SMS\PXE\CacheExpire. The behavior is of that value is different depending on the hotfix/SP level of SCCM. The hotfix mentioned here is for SCCM sp1. kb969113: 0 --> 60s SP2: 0 --> 3600s If you're running SP1 + kb969113 and the value is set to 0: the timeout is interpreted as 60s. If you're running SP2 and the value is set to 0: the timeout is interpreted as 3600s. You can see that by having a look at smspxe.log. Workaround: set the value to 60 (or some other small value). My step by step SCCM Guides I'm on Twitter > ncbrady