how to reboot the device without using watchdog?

hi to everyone .
a simple question please.
I would like to use netwatch tool to reboot the device when it looses connection with a specific IP address instead of using the common use of watchdog ?
which command should I put in the empty space of the netwatch tool ?
with thanks

Just /system reboot, I would think ?

Take into account there can be a lot of reasons why connection is lost, your device might reboot quite often !

thank you very much
just an advisory question