PXE

PXE Boot image | slow download time

0.0 00 Our good friend Heinrich wrote a great article back in 2014. https://thedesktopteam.com/heinrich/sccm-2012-boost-pxe-deployments-speed/ Recently I have been tasked to deploy some Surface Pro 5 devices and the PXE Boot image was taking just over 7 minutes to download. My goal was to reduce it as much as possible, but at the same time keep the integrity of the PXE Boot process. I found this fantastic post by Jörgen Nilsson http://ccmexec.com/2016/09/tweaking-pxe-boot-times-in-configuration-manager-1606/ it includes a table with his tests and the resulting speeds. In my case with multiple device models including the Surface Pro 5 I decided to go for 8 as my value for the key bellow. The 7minute download became a 1min 37sec download. Location: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SMS\DPName: RamDiskTFTPWindowSizeType: REG_DWORD The default value is 1 (1 data block fills the window) I was unable to use the RamDiskTFTPBlockSize registry key, as setting any values to it made the pxe boot fail….

SCCM 2012 Boost PXE deployments speed.

5.0 03 Hello guys! I’ve written about this subject before, but I’ve been getting some questions over the holidays about PXE boot and how to improve its performance, change the rate at which it deploys images etc … So to give yourself a little more flexibility, you can use following steps below. From the distribution point (where you enabled PXE) complete the following Open regedit and locate HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SMS\DP Add a QWORD value (for 64bit Server OS , I’m using Server 2012) and call it RamDiskTFTPBlockSize Give it a Hexadecimal value of  “4000” or a decimal value of “16384” for example, Try a deployment from the distribution point where the changes were made, and you’ll notice a speed difference! NOTE: As always, be sure that you don’t over indulge, it can have a degrading affect on network traffic. Enjoy, H