Host down, but ping works

[Jesús Oliván]

Ok, i revised my check_commands config and i saw that check_host_alive 
is executing check_fping and check_ping is executing a simple ping, then 
i changed check_host_alive to send a single ping... but now, check_host 
alive info on this host isn't updated (Last check is from one hour ago). 
How i can change check_host_alive check_interval?

Thanks for your help! :)

Giles Coochey escribió:
>> Hi,
>>
>> i'm monitoring several hosts with Nagios and i've encountered with a
>> little problem some time ago...
>>
>> Two of my hosts appears to be down (host marked as red), but i'm
>> monitoring ping service and it works fine. I've got more services on
>> this "ghost" hosts and they work well. What can i do to normalize these
>> hosts situation? Why host is marked as down when its ping is responding?
>>
>> Thanks in advance!
>>     
>
> Resolving your problem on the first try is going to be rather difficult. It would be good to have more information.
>
> What check do you have to check the host is alive (in some sample configurations this is called check-host-alive)?
>
> And what check are you doing for check-ping?
>
> In the sample configuration (it is only a sample configuration, and many have completely home-grown ones), check-host-alive only sends a single packet, whereas check-ping sends more packets.
>
> If your first packet is always dropped then check-host-alive will always fail and check-ping will still succeed enough of the other packets work.
>
> It could be a network problem, but it could be any manner of other things.
>
>
>   


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