What this message means

[Max Hetrick]

ReynierPM wrote:
> Hi every:
> Today I get this message from one of my checked hosts: "Notifications 
> for this host are being suppressed because it was detected as having 
> been flapping between different states (24.2% change > 20.0% threshold). 
> When the host state stabilizes and the flapping stops, notifications 
> will be re-enabled."
> 
> What this means? What I need to check on this host?

Flapping is some built in logic to Nagios that prevents a barrage of 
notifications of hosts/services up and down messages.

http://nagios.sourceforge.net/docs/3_0/flapping.html

So if a host keeps coming up, and then down, and then up, and then down, 
notfications are suppressed to prevent a load of messages.

You can disable this feature if you want globally by setting in the 
nagios.cfg file.

enable_flap_detection={0,1}

A lot of times, if a host is flapping, it might not be the actual host 
that has a problem, perhaps it's a switch, or some other piece of 
equipment in between. It does have its uses.

Regards,
Max

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