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Speed Up SCCM TFTP Performance to PXE clients
Make PXE deployments much faster with a simple change.
John Savill
May 13, 2014
1 Min Read
Q: How can I speed up the Trivial File Transfer Protocol performance from Configuration Manager to my PXE clients?
A: It's possible to change the size of the blocks used for the Trivial File Transfer Protocol (TFTP) transfer; the larger the block size, the greater the performance. Microsoft's recommendation is to not set higher than 16384; in addition, you must use multiples of 4096, such as 8192, 16384, and so on. I got a huge performance boost from using a value of 16384. Perform the following steps:
Log on to the Configuration Manager PXE Windows Deployment Services (WDS) server.
Open the registry editor (regedit.exe).
Navigate to HKEY_LOCAL_MACHINESOFTWAREMicrosoftSMSDP.
From the Edit menu, select New, DWORD value.
Enter a name of RamDiskTFTPBlockSize and press Enter.
Double-click the new value.
Set the Base to Decimal and set the value (e.g., 16384).
Click OK.
Restart the WDS server service.
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