How to boost PXE TFTP Boot speed

Posted: May 30, 2013 in Configuration Manager, Information, System Center
Tags: , , ,

Here’s a neat tip to speed up the WDS / PxE boot times for your OSD deployments. This should work on pretty much any WDS (and RIS?) servers you have.
http://www.sccm.biz/2013/05/how-to-boost-up-pxe-tftp-boot-speed.html#!/2013/05/how-to-boost-up-pxe-tftp-boot-speed.html

Create this in registry on Your PXE WDS Server:

HKEY_LOCAL_MACHINE\Software\Microsoft\SMS\DP\RamDiskTFTPBlockSize
Type Reg_Dword
Value: 16384 Dec (Do not use higher value than this!)
((Recommend that you increase this setting in multiples (4096, 8192, 16384, and so on) and that you not set a value higher than 16384.))

Restart WDS Service
Remember the higher value the more risk of packet loss if bad network Connection.
You have to try this out carefully in your network environment.
If experiencing problems, try lower value.

Comments
  1. TheKing says:

    Bollocks

  2. Ioan Popovici says:

    This is the right way to do it… http://sccmzone.ro/window-size-dll-patch

    • Scott says:

      You may be correct that this is a more technically correct approach, but it is also significantly more difficult and likely to be entirely unsupported.
      What would be vastly better would be for Microsoft to add proper supported configuration options to improve this.

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