below is a network map of all my devices. i have a 75mbit down and 35 mbit up connection. when going from B to L to M to N to Internet I get full speed and 15ms ping to a city 100 miles away. so no issues. however, if i am maxing out the download and i transfer files from D to M to L to B the internet download connection drops to about 200 KB/s while the internal file transfer sits at about 15 MB/s. this is baffling me.