This may be due to the raw packets not being properly forwarded to your physical interface.
It may not work running the tools inside a VM, depending on your setup. The plcboot and plctool utility may need root permissions, since they try to write raw packets to the ethernet interface. (Allegedly, plcboot can do that too, but it needs a “softloader” file, which I couldn’t be bothered to extract from the TP-Link software.) To make the firmware permanent again, the flash needs to be rewritten. plcboot only performs a one-time boot when given the options above. Finally, flash the firmware again, using the manufacturer tool. Anyway, to get the correct mac address back onto your PLC, have a look at the label on your plc, and then: I presume the firmware utility reads it beforehand and updates the pib before uploading it. Since the pib file shipped with the firmware only contains a default mac address, the adapter will have been set to that, too. 
Download and compile the tools, and boot the PLC:.pib files from the manufacturer firmware package to nvm and pib (The atheros utilities are picky when it comes to file names, something I only found out after head-scratchingly reading the code.) Connect the PLC’s network port directly to your computer’s.Faint hissing from the device, in normal operation it is silent.
After unplugging and re-plugging the PLC, no lights light up. Next up, “Local device not connected” error message. “Firmware Upgrade failed” error message. Have a bit of bad luck, or a power outage during the update. Start firmware update using the aforementioned setup tool. Refrain from directly connecting the PLC to the computer, instead leave it hooked up to a switch and other hardware. Download firmware files (“nvm” and “pib” files). Manage the Whole Powerline Network This utility also enables you to manage the whole powerline network, such as adding a new device, setting a new powerline network name, and turning on or off the LEDs. Note that earlier TP-LINK powerline devices (200Mbps series) and non-TP-LINK powerline devices only support the renaming and removing functions. Download TP-Link TL-WPA4220KITv1 Powerline Utility 140319 for MAC (Router / Switch / AP).
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