I had three edisons and often encountered this problem.
These are some of the ways that worked for me -
Soln # 1
Upgrade to the latest firmware. Once the Edison restarts (after you issue the reboot ota command), do the normal procedure of 'configure_edison --server and setup the WiFi when it comes to that step.
Soln # 2
Issue the following commands.
ifconfig usb0 down
/sbin/route add default gw 192.168.2.1
This is what worked for me. Hope it does for whoever has similar issues.
Retrieving data ...