PXE boot not working on some models

[ddevore9]

I have just encountered this issue myself (ZCM10.2.1). I have no idea where the issue is coming from, within windows, linux or osx its perfect... Today I blew away my entire ZCM install (working on migrating) but still have the same issue!!! Were using HP Procurve switches using OSPF for routing, I just restarted our core cisco router but can't verify if it helped, I'll let you know.