Simple Question, UNREACHABLE vs DOWN

[Steven Coutts]

(Top posting error corrected!)

Rob Moss wrote:
>>
>> Someone correct me if i'm wrong but my understanding is:
>>
>> Unreachable is the first single ping check when nagios is started up..
>>
>> Down is a hard state, after checking X many times (usually 10, 
>> defined in nagios.cfg) it's flagged as down.
>>
>> Cheers
>> rob.
>>
Pete Dewell wrote:
> I agree with the down definition, but I've always thought of 
> unreachable as :
>
> Unreachable is when the parent of a host is down. e.g. if host1 is 
> down, then any hosts that have host1 as a parent will be marked as 
> unreachable, since Nagios cannot connect to those hosts to check them.
>
> Pete Dewell
Ah I see, pretty obvious really!

Makes sense from my stats, expect one anomaly. One of my switches went 
down, this switch has three other switches hanging off it (all three 
have the correct parent set in my config) but only two have been marked 
as being unreachable for that period!!

Thanks

-- 
Steven Coutts B.Sc.(Hons) MBCS
scoutts at bcs.org.uk

PGP Public Key
<http://stevec.couttsnet.com/scoutts.asc>



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