[xymon] Brief red alarms

[Tim McCloskey]

Hobbit may not be the issue at all here.  You could test this by writing a small script to do a constant ping of host $foo and record the results to a file.  You might see similar patterns outside of hobbit.  
 
Looking at the current summary page it appears that these hosts are more problematic.  Yet, looking at a report (short version attached) for Nov1 to Nov 17 there are clearly quite a few more.
  
 2 10.1.0.32
 2 10.1.0.40
 2 10.1.0.73
 2 10.1.0.92
 2 10.3.23.242
 4 163.153.65.139
 4 atlas.cairodurham.org

From the report (which is for conn test only) we see these hosts have 100% uptime.  Until a short while ago 10.1.0.73 was at 100% avail.

10.1.0.71	100
10.1.0.72	100
10.1.0.90	100

What makes these three hosts different?

Regards, 

Tim


________________________________________
From: Jaime Kikpole [jkikpole at cairodurham.org]
Sent: Thursday, November 18, 2010 8:59 AM
To: xymon at xymon.com
Subject: [xymon] Brief red alarms

We recently had a major change in our network's design.  The entire
topology had the change, including IP addresses of servers and the
"routes" through switches between things.  Ever since then, Xymon is
reporting very brief (10-20 seconds) outages of one server or another
every 30-60 minutes.

I tried this suggestion:
http://xymon.sourceforge.net/docs/known-issues.html#netfail

No luck.  A few minutes later, the server Xymon is running on
allegedly failed the "conn" test for about 1 second.

Any other ideas?  If you want to see the symptoms, look at my Xymon
instance at http://cns.cairodurham.org/hobbit/bb2.html.  This will
show the brief outages that I'm talking about.

Thanks in advance,
Jaime Kikpole

--
Network Administrator
Cairo-Durham Central School District
http://cns.cairodurham.org

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