Nagios uses check_ping for the host check of most hosts.<br><br> The check is configured to send only one ping.<br><br> So if Nagios receives a response, it is 0% packet loss.<br><br> If no response, it is 100% packet loss.<br>
<br><br># 'check-host-alive' command definition<br>define command{<br> command_name check-host-alive<br> command_line $USER1$/check_ping -H $HOSTADDRESS$ t 45 -4 -w 3000.0,100% -c 3000.0,100% -p 1<br>
}<br><br><br><br><br> Yet, Nagios reports:<br><br><br><br> ping@bway2852-3-1.net.columbia.edu:2009-06-30 23:24:33:PING OK - Packet loss = 85%, RTA = 47.06 ms<br><br><br><br> How is it possible for Nagios to lose 85% of one ping?<br clear="all">
<br>-- <br>Cordially,<br>Shadhin Rahman<br>