Testing quality (rtt and packet loss) of Internet connection?

[Patrick Morris]

On Wed, 22 Nov 2006, Chris Hardie wrote:

> In our old system, we monitored the health of our connection to the
> Internet by checking packet loss and round trip times in ping packets
> sent to www.google.com and www.yahoo.com.  Because either site was
> liable to have localized, temporary problems, we only triggered an alert
> if all of the sites we were pinging were experiencing a warning (which
> usually meant there was a problem with our connection, as opposed to one
> with theirs).
> 
> In Mon, this was done with a config option that said "only consider this
> group of hosts to have a problem if ALL of them have a problem."  So
> far, I can't find a way to do this in Nagios; I tried it with host
> dependencies, creative check plugin setups, etc. and can't seem to do it
> reliably/gracefully.

You can set up individual non-alerting ping checks, then use
check_cluster to group them and only alert if the whole "cluster" fails.

There are plenty of other ways, too, but that one's pretty easy.

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