Hi, I would say the issue is more located at the printer. Try by updating the printer NIC driver, check the configuration of the NIC itself. It's not working with two differents switches! It's more likely to be something else than the switches (bad network cable, printer's NIC driver, printer's NIC itself) ... View more

Hi, From experience, it's a bad cable/connector/connection. The switch sense that the device at the other end need power, so it's sending power to it (That for the lightning). But when it's come to establish Layer 1 connectivity, it's fail. The switch is not able to detect the speed of that the other end is able to handle. Replace patch cable at the switch, the one at the AP first. Change connector at both end of the inwall cable if changing the patch panel didn't help. Test the cable with a proper cable tester (Fluke DTX1800 or that kind of testset) before gooing further (or do it right from the begining, I may also be wrong) and replacing the complete inwall cable. keep us posted. ... View more

Hi,    If the port on the switch and the printer is set to auto-negotiate it's speed and duplex, look at that brown port and check how duplex have been set by the auto-negotiation. If your switch port indicate that it is working in half-duplex and that you have collision, I would believe it's a firmware issue. As there is collision on that port, it's tell me that the printer have successfully negotiated and set itself to full duplex, but the switch have not because of the collision counter.    Have you try to downgrade the switch firmware? Keep us posted.      ... View more