We're running MEM 2010
When trying to build some machines at a site, we're continuously running into the error attached .
As per some solutions advised we've tried to change the TFTP block size and also disabled the Variable Window Expansion option (steps below)
Open the WDS console, right click on the server then click on Properties
Go to the TFTP tab, block size enter 4096 or more
Uncheck Enable Variable Window Expansion and click Apply
Restart WDS service
But we've not seen any change. We're not configuring WDS anywhere specifically, but instead it's being controlled by SCCM. Next option, we're considering is to find if there's any DHCP Snooping that's happening and then to disable the same.
Kindly advise if anything else can be done.