AirPort Extreme cannot connect to Internet while direct ethernet connection works
Hi,
I have an AirPort Extreme (AE) Base Station (ME918LL/A) with (the latest 802.11ac version) and Gigamonster Internet Service. The firmware on the AE is quite new (7.7.8).
The AE used to work flawlessly for a long time, but starting yesterday it cannot connect to the Internet.
Gigamonster provides wired ethernet port to every unit in our building, so we don't use cable modem. The AE is directly connected to the ethernet port on the wall through an ethernet cable.
I can access Internet on my MacBook by directly connecting to the ethernet port with a USB-C adapter, and I even tried to add an ethernet switch between my MacBook and the port on the wall and it works too. However, when I connect AE to the switch or directly to the port on the wall, I cannot connect to the Internet (either by wireless or by wired connection through AE). So I'm pretty sure that the problem is with the AE.
The AE does have green light on, but the AirPort Utility (AU) app on my MacBook and iPhone says that it is disconnected from the Internet, so the AU app shows green on the AE but amber yellow on the Internet.
Here are what I have tried:
1. Unplug AE, wait a while, and plug the power and ethernet cable back (no other things connected).
2. Push the reset button and let the AE reset, then plug ethernet cable back after AE finishes rebooting.
3. Unplug AE power, pressing the reset button down while plugging the power cable on (supposed to be a cold reset to factory setting), setup the AE using AU app (but in the middle of the way the AU app says the AE does not get Internet and asks me to reset cable modem, which is not applicable in my case).
So neither of these works. I still get green light on AE but no Internet connection through it.
Does this mean the AE is broken? It was purchased over a year ago, and I'm not sure Apple will fix it since it's a discontinued product now. Nevertheless, it seems so weird if the AE just breaks down quietly like this. Is there anyway to troubleshoot this? Any suggestion is appreciated!
Airport Extreme 802.11ac