Options - Ping monitor
Ping Monitor checks if hosts are up and notify when the ping fails.
Click "List of monitored hosts" button to edit the list of monitored hosts.
Set time interval between two consecutive checks of a monitored object
and number of ping attempts before marking a device as "down".
If necessary turn on the option "Notify when the ping fails"
Set notify options on the "Notification" tab.
The switches are not shown in the list of monitored hosts,
but Ping Monitor checks them, too.
In some cases it is desirable to stop notification for certain switches.
Add IP addresses for those switches into the list of monitored hosts
and put a '-' character before the address (example: -192.168.0.1).