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Dell Optiplex 7010 not booting WDS server.


I've just set up WDS on a clean VM. Carefully followed instruction to do so.

For some reason I can't get our fleet of Dell Optiplex 7010 units to talk to the WDS server. I know it's not the server as I can successfully boot to it from a Toshiba laptop.

When booting from the NIC I get error " PXE-E51 - No DHCP or proxyDHCP offers were received"

Has any experienced this issues. Please ask for more details if needed.
1 Solution

There is a Technet article with some ideas that might help you here:


PXE-E51 errors take place before any booting of WIMs occurs. There should be no OS drivers, it's strictly between the card firmware and the PXE server. It is most likely some type of network problem.Usually no IP helper, or the WDS service is stopped.

If it is truly PC-specific, that is some PCs boot, while others don't on the same subnet, that is very odd. I had 790's and E6420's that wouldn't PXE boot on 1 gb segments, but were fine on 100 mbit. That was resolved by a BIOS upgrade. Are you sure the network folks haven't changed something on the network without telling you?

• PXE-E51: No DHCP or proxyDHCP offers were received.
The client did not receive any valid DHCP, BOOTP or proxyDHCP offers. To resolve this issue, check each of the following network configuration items:

•      DHCP services are not available on the network to which the PXE-enabled NIC is connected.
•      A DHCP proxy or IP helper address is not configured for the subnet on which the PXE client is connected.
•      The switch port connected to the PXE NIC is running Spanning Tree Protocol, EtherChannel Protocol, or Port Aggregation Protocol and is thus not activated immediately when a link is detected. This forces the DHCP request from the PXE client to timeout.
•      DHCP is available on the network, but PXE is not.
•      The network cable is not attached to the PXE-enabled NIC on the target server.
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