Issue
PXE Boot fails with a "TFTP TIMEOUT" error. This can also present as the following errors:
- PXE T04
- PXE-E36
- PXE-E32
- PXE Error M0F
Cause
VPN software has changed the MTU setting in the registry on the PXE Representative causing TFTP to fail.
A network device in the network is dropping or malforming network packets.
Resolution for PXE Representive MTU size
On the PXE Representative, do the following:
- Open Regedit
- Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces
- Search for "MTU" and select "Match whole string only".
- There will be an MTU value for each network interface
- Verify that the value is set to 1500
- The PXE Representative may need to be rebooted
Resolution for Network Device Dropping or Malforming Packets
More information on PXE boot errors:
PXE Boot errors and descriptions.
How to troubleshoot LANDESK PXE boot: