I'm having issues with PoE+ power and ethernet connections. The setup: I have 12 lattepandas that are connected via CAT6 cable to a DrayTek P2280x switch - The switch has a 400W Power capacity and directly budgets 30W to each connection and I have confirmed that each connection is operating at 802.3at (it is configurable on the switch manager). Each devices draws an average of 12W during operation but can go up to 17 during boot Power is split out from the PoE+ connection using the D-Link DPE-301GS set at 12V The issue: When individually plugged in (only one device, no others) each device can receive power and 1000base-T connection and operates as intended. 8 of the devices will not work if any of those other 8 are plugged in (example, device A works by itself, plug in device B and device B won't turn on, remove device A and device be will start working) When the switch is powered off, all devices are plugged in and then the switch is powered on, all devices get power and ethernet connection HOWEVER if a device is removed and re-plugged it won't get power or ethernet When the switch shows there is no power or ethernet both status lights are off and the switch management page shows nothing is connected HOWEVER the power status lights on the splitter and the device are on however not enough power is being delivered for the device to boot The other 4 devices operate perfectly fine and there is no impact on their power or connection when other devices are connected - connection order does not impact these 4 This issue is port and switch agnostic - I have tried with a managed enGenius switch as well as a unmanaged Netgear one. Has anyone come across a problem similar to this before? Could there be interference between the ethernet cables themselves that might be causing this?