[Xymon] Xymon Network Tests - Behaviour?

[Mario Valetti]

Thank you for


> Date: Wed, 24 Aug 2011 14:42:21 +0200
> From: <henrik at hswn.dk>
> To: <xymon at xymon.com>
> Subject: Re: [Xymon] Xymon Network Tests - Behaviour?
> Message-ID: <04b91460cd235e5018e5179c06657153 at localhost>
> Content-Type: text/plain; charset=UTF-8
>
> On Wed, 24 Aug 2011 13:52:55 +0200, Mario Valetti <mariov652 at gmail.com>
> wrote:
>> Could someone please explain the exact behaviour when a host becomes
>> unreachable?
>>
>> As I understand it, it works as follows...
>>
>> - Xymon pings each host only once,
>> - if a reply is not received within a specified time (1sec), 3 ping
>> requests are sent out,
>> - from one of these three additional pings if a reply is received, the
>> host is not indicated as being unavailable and things continue
>> normally.  If a reply is not received from these three additional
>> requests, the host is marked as unavailable and four pings requests
>> sent out every minute until a response is received.
>>
>> - Why do hosts show unavailable for 40s, 45s for example?  Are the
>> times above not fixed and rather work dynamically?
>
> Not quite, but the normal test and the extra test are scheduled
> independently (they are two different tasks in tasks.cfg). The only
> restriction is that they will not run simultaneously. So when the first
> test detects that the host is down, the extra test may run anywhere from 0
> to 59 seconds after that.
>
>> Second question is regarding hosts that are shutdown for maintenance,
>> for example...
>> Usually, these are set to 'until ok' and the host marked blue with no
>> alerts.  However Xymon still sends an arp request / ping to check when
>> the host becomes available.
>>
>> Is it possible to disable a host in a way that avoids Xymon checking
>> for the host at all?
>
> No. How would Xymon detect that the host becomes OK without trying to ping
> it ?
>
>
> Regards,
> Henrik