Hey Everyone— Got a weird one here. Back in mid-2017, we got the 1000Mbps x 1000Mbps AT&T GigaPower service. This has been routed (NAT, default host, DNS) via an AirPort Extreme 802.11ac base station, and has worked great. I've regularly speed-tested at >850Mbps both ways**. However, recently, I've started getting a very consistent cap of only 50Mbps down and around 300-400Mbps up. I swapped in another AirPort Extreme, applied the same config, and saw the same weird behavior. Moving a client device from the AP Extreme to plugged directly into the AT&T modem w/ the same cable results in 850Mbps+ up and down again. I also tested reconfiguring the AP Extreme into Bridge mode, rather than routing, and saw the full speed return. So, basically, the AirPort's routing is throttling the connection for some reason. The weird part is that I haven't changed anything and this has only recently occurred. Might something have changed on the AT&T gateway to cause some sort of conflict w/ the AirPort's routing? If so, what to try changing on the gateway (it's a Pace 5268AC). Again, this has worked perfectly exactly as is for around a year and a half. Suggestions for further testing/comparisons? Of course I have done all the basic things like power-cycling devices... Thx, Fred ** = I am performing all of these observations and tests via WIRED connection, so I'm not really concerned about falloff when on WiFI...just optimizing the wired routing.