If you have eeros, you can plug your devices into any unused ports on the eero equipment.
It is best to plug into the eero that is connected directly to the ONT.
It is also okay to plug into other eeros that are wire back to the first eero.
We don't recommend plugging into the eeros that connect to the network over mesh, because the Internet traffic from your wired devices may negatively impact the devices connected over Wi-Fi.
We don't recommend plugging into the eero PoE 6 access points, because we don't want you to take the access points off the wall/ceiling.
If there are not enough ports, you can buy a simple unmanaged switch to expand the number of ports. There are 5-port and 8-port models available online or in store for $15-$30.
If you have Managed Wi-Fi Premium, then you can plug an unmanaged switch into a designated port on the Adtran managed switch. Then you can plug your devices into the unmanaged switch.
If you have an 8-port Adtran switch, plug into the port labeled 8.
If you have a 24-port Adtran switch, plug into the port labelled 22.