FreeBSD Cron Job to run (ifconfig em0 down; ifconfig em0 up)

[Wojciech Puchar]

fragment from my test program (used for other thing but doesn't matter)

/sbin/ping -i 0.5 -s 1450 -c 3 tested_host >/dev/null 2>/dev/null
if [ $? != 0 ];then
  perform_action_if_doesnt_ping
fi