host shows down but it is not

[Joe Konecny]

Thomas Guyot-Sionnest wrote:
>> 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
> 
> The problem with check_mk pinging is that the ICMP sequence number
> doesn't increase. Some devices treat this as a duplicate packed and
> ignore it (I'm not sure what the RFC specify but this is probably the
> correct behaviour).
> 
> Just use the non-mk host check command for the host definition with the
> check_mk command for services and you should be fine.

I wondered about that and searched but could find no info either way
about how the seq was supposed to work.

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