Hi, If i connect an ethernet cable into my GPON from the ISP i get download speed of 300Mb/s. The GPON connects with an Airport Extreme latest gen 2014 via ethernet cable CAT6 (1.5m long). If i run a test speed via ethernet through the Apple Airport i only get 220Mb/s. So i loose 80Mb/s though my Airport extreme. I tried different cables but i got the same results. Any tips for troubleshooting please?