AXT1800. The WAN port keeps autonegotiating 100Mb no matter what device or cable I connect it to. I can force 1000 via ethtool, but it never establishes the connection and goes back to 100Mb by itself shortly.
Any ideas? Is this [out of warranty] hardware just bad?
You said you tried different cables however swap the ports back and swap the known good cable thats on the Lan port over to your original wan and try again, just to rule that out.
I know you did, but I was just asking to test the 100% known working cable by simply swapping them over and changing port back, if you did and it still doesn't work then fine, it was only a suggestion.
Just to add, you also didn't state what Firmware you are running. I would do a reflash of the current latest/stable firmware and toggle "keep settings" Off - could be a config issue