logfile=$sandbox/`echo $app | sed 's,/,.,g'`.log
logs="$logs
$logfile"
- ryu-manager "$app" --log-file="$logfile" & pid=$!
+ ryu-manager --ofp-tcp-listen-port=6653 "$app" --log-file="$logfile" & pid=$!
echo $pid > "$sandbox/ryu.pid"
i=0
while sleep 1; do