Slow speeds on new AT&T Fiber | AT&T Community Forums
Aug 06, 2017· Slow speeds on new AT&T Fiber. I had AT&T Fiber installed last week and have been having slow speeds. I'm using a Linksys EA9300 in DMZ Plus mode behind the RG (Pace 5268AC) and turned off IPV6 on the Gateway. On a 5GHZ network from the Linksys, I am only getting around 75-80 Mbps. If I connect to the AT&T Wifi on 5GHZ, I get 300-375 Mbps.