Packet loss reported by check_ping?

[Richard.A.Childers at wellsfargo.com]

>From the numbers you've provided it seems clear that, by default, Nagios
sends at least one packet above and beyond those specified by the
administrator.

Regards,

--richard 

-----Original Message-----
From: nagios-users-bounces at lists.sourceforge.net
[mailto:nagios-users-bounces at lists.sourceforge.net] On Behalf Of Jason
Byrns
Sent: Wednesday, December 13, 2006 5:19 AM
To: Nagios Users
Subject: [Nagios-users] Packet loss reported by check_ping?

Good morning, all.

I've been tweaking our Nagios install over the years.  I've often
wondered exactly how the check_ping plugin reports its results.

I used to leave this plugin at the default number of packets, which I
believe is five.  If and when we saw warnings on packet loss, it would
usually give us numbers like 16%, 32%, or multiples like that.  Why not
multiples of 20%, given that it tried five packets?

Now I'm worried, though.  I recently changed our default ping commands
to only use ONE ping packet.  This was due to advice I found after a
Google search, when I was seeing extremely high latencies on my host
(and some service) checks.  It certainly seemed to help, too, now my
host latency is usually below one second.  (Instead of the FIFTEEN
MINUTES it was reporting before that)

But I still see some reports of packet loss.  Like, 50% is a common
number I now see.  HOW is it seeing anything but either 0% or 100%
packet loss, if it uses only one packet per host check??

Also, along those lines...  I recently moved from the 1.2 Nagios to the
more recent 2.4-2.5 Nagios.  Nagios 1.X seemed to only trigger a host
check if a service check failed.  Nagios 2.X seems to ALWAYS run host
checks in addition to service checks.  The fact that host checks are
currently not run in parallel seems like this can really limit
performance.

Why did that behavior change?  Will host checks be run in parallel for
the 3.0 series, like I think I read once...?

Thanks for any input!

--
Jason Byrns
Production Manager
System Administrator
http://www.MicroLnk.com/
402-328-8600 ext. 653

------------------------------------------------------------------------
-
Take Surveys. Earn Cash. Influence the Future of IT Join
SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys - and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDE
V
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when
reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null


-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys - and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null