I think this is the best place to start this discussion.
I began experiencing interference with my personal WIFI router from an Xfinity router in the next door (adjacent unit in a tri-plex single story unit). Using inSSIDer program I was able to see that the Xfinity router and the users portion were on the same channel. I moved my router from channel #1 to ch. 11 to avoid the interference. Within two days, the Xfinity unit had moved to ch. 11 also, creating the interference again. I have moved back and forth a dozen times after finding the Xfinity unit was moving with my changes. I asked the neighbor what was happening and they professed ignorance. The difference between the two signals is only minus 2 db in strength. Comcast says they have no control once the Xfinity router is installed but the user denies doing anything. I have to check the channels daily to insure my network remains interference free and move to a clear channel if needed to escape the interference. Any suggestions would be very helpful. Short of mounting grounded foil on the wall between the units I have run out of ideas.
Edited by mjd420nova, 24 May 2018 - 09:56 AM.