Following instructions are provided without any warranty, and may even get you in trouble legally. The instructions are provided for testing, learning, preventing e-waste, and should be use with care. We (including contributers + commentators) are not responsible for any damage to your device(s) or any legal issues.
Instructions have been moved to https://github.com/francoism90/asus-router. :)
Most likely yes. And or a combination with the OS. You can try with another client and see if it works as expected.
You can check on our router how your client is connected, this gives you all the details.
Here for eth7 on my router:
If you want to dig deeper: Capture 802.11 beacon frames with wireshark. Then you will see what your router is advertising, and how the handshake with the client goes on....