I can't connect Airport Extreme to PPPoE
Hi there
Up until yesterday I had an Airport Express to connect to a PPPoE service via a HUAWEI ONT/optic fiber. Because the Airport Express doesn't support 802.11 ac I bought an Airport Extreme and I just can't make it to connect to the same ISP. If I connect my Macbook Pro via Ethernet to the ONT it works just fine. If I use again the Airport Express it works just fine. The Extreme simply refuses to.
Please help
MacBook Pro (Retina, 15-inch, Mid 2015), OS X Yosemite (10.10.5)