check ping explanation required

[David Rosenstrauch]

shadih rahman wrote:
>         Nagios uses check_ping for the host check of most hosts.
> 
>         The check is configured to send only one ping.
> 
>         So if Nagios receives a response, it is 0% packet loss.
> 
>         If no response, it is 100% packet loss.

>         How is it possible for Nagios to lose 85% of one ping?

The plugin issues 5 pings by default:

[root at webapps nagios]# /usr/lib64/nagios/plugins/check_ping -help
check_ping v1991 (nagios-plugins 1.4.13)
Copyright (c) 1999 Ethan Galstad <nagios at nagios.org>
Copyright (c) 2000-2007 Nagios Plugin Development Team
         <nagiosplug-devel at lists.sourceforge.net>

Use ping to check connection statistics for a remote host.

Usage:check_ping -H <host_address> -w <wrta>,<wpl>% -c <crta>,<cpl>%
  [-p packets] [-t timeout] [-4|-6]

Options:
  -h, --help
     Print detailed help screen
  -V, --version
     Print version information
  -4, --use-ipv4
     Use IPv4 connection
  -6, --use-ipv6
     Use IPv6 connection
  -H, --hostname=HOST
     host to ping
  -w, --warning=THRESHOLD
     warning threshold pair
  -c, --critical=THRESHOLD
     critical threshold pair
  -p, --packets=INTEGER
     number of ICMP ECHO packets to send (Default: 5)
...

DR

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