Same, DHCPv6 automatic configuration. I’ve fixed the issue. I used the command ifconfig <Interface_name> mtu <mtu_size> up and set that interface to 1500. Now my PC and Xbox no longer complain about MTU. It’s weird I had to do it this way, or that a factory reset didn’t fix this, but yeah. Thanks for your help in finding it! Without you I wouldn’t have noticed the ifconfig output, so thanks a ton.