host shows down but it is not

[Joe Konecny]

On 10/14/2009 10:54 AM, Martin Melin wrote:
> The host shows as down because the check_command for the host is
> CRITICAL. Given the performance info you pasted, this makes sense, since
> the check_command looks like a normal check_ping and you seem to have
> 80% packet loss from your Nagios host to 70.62.24.79 <http://70.62.24.79/>

The question is why there is 80& packet loss showing in check_mk
and nagios ping there is 0% packet loss.  Always.


Here is a tcpdump of plain Nagios pinging...

11:23:50.328519 IP 10.0.0.4 > adsl-79.dacor.net: ICMP echo request, id 18478, seq 1, length 64
11:23:50.329365 IP adsl-79.dacor.net > 10.0.0.4: ICMP echo reply, id 18478, seq 1, length 64
11:23:51.328739 IP 10.0.0.4 > adsl-79.dacor.net: ICMP echo request, id 18478, seq 2, length 64
11:23:51.329368 IP adsl-79.dacor.net > 10.0.0.4: ICMP echo reply, id 18478, seq 2, length 64
11:23:52.327735 IP 10.0.0.4 > adsl-79.dacor.net: ICMP echo request, id 18478, seq 3, length 64
11:23:52.328472 IP adsl-79.dacor.net > 10.0.0.4: ICMP echo reply, id 18478, seq 3, length 64
11:23:53.326740 IP 10.0.0.4 > adsl-79.dacor.net: ICMP echo request, id 18478, seq 4, length 64
11:23:53.327578 IP adsl-79.dacor.net > 10.0.0.4: ICMP echo reply, id 18478, seq 4, length 64
11:23:54.327788 IP 10.0.0.4 > adsl-79.dacor.net: ICMP echo request, id 18478, seq 5, length 64
11:23:54.328478 IP adsl-79.dacor.net > 10.0.0.4: ICMP echo reply, id 18478, seq 5, length 64

Here is a tcpdump of check_mk pinging...

11:29:24.042801 IP 10.0.0.4 > adsl-79.dacor.net: ICMP echo request, id 58673, seq 0, length 64
11:29:24.043603 IP adsl-79.dacor.net > 10.0.0.4: ICMP echo reply, id 58673, seq 0, length 64
11:29:24.043768 IP 10.0.0.4 > adsl-79.dacor.net: ICMP echo request, id 58673, seq 0, length 64
11:29:24.124046 IP 10.0.0.4 > adsl-79.dacor.net: ICMP echo request, id 58673, seq 0, length 64
11:29:24.204417 IP 10.0.0.4 > adsl-79.dacor.net: ICMP echo request, id 58673, seq 0, length 64
11:29:24.284728 IP 10.0.0.4 > adsl-79.dacor.net: ICMP echo request, id 58673, seq 0, length 64

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