This article describes how to use multiple WDS servers on a single network.
This solution is undocumented by Microsoft, it is possible to have multiple WDS servers active on the same network.
To enable this feature, it is necessary to add a registry key to each PXE server. During boot, it will be possible to press the F11 or F9 key depending on the client (Legacy or UEFI) to discover all the servers available on the network.
The operations are to be performed on each WDS server, the client will start on the first server that responds.
Open the registry editor (regedit) and go to the following location:
Repeat the operation on the other WDS server(s).