Recently, my home ISP service changed to AT&T Uverse. While it's much faster than the old copper-wire DSL (!) I had before, there are transient drops of ssh connections.I can't determine a pattern: sometimes, a link will stay up for several days, but then I'll have a series of drops every minute or two. This seems only to affect ssh connections.  Both the server and my local machine report a broken pipe error. My local machine is a System76 Lemur running Ubuntu 16.04.1; the remote is a virtual FreeBSD box (10.3). I appear to have the same results with ssh -Yorssh -XATT hasn't been much help (since I suppose ssh is outside the standard home user world). 
Transient drops of SSH connections through AT&T
ubuntu;ssh;networking