Which LDMS version are you running on?
Because for 9.5 and 9.5Sp1, a bug has been found referenced as TFS 74255:Multicast does not work with OSD.
Would it help?
Does the target machine have a valid network connection and ip address? Can you ping it from the core server using that address? Open a command window on that device in WinPE and run ipconfig to see what it says.
When it starts up it should be sending a miniscan so that the core server knows how to reach it. Does the address in the inventory record match the ip address of the device?
Network connectivity is the most common issue here, does WinPE contain a valid driver for that type of device?
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