Network delay alarms from the test-box at your site.

Dear test-box hosts,

As announced during the last RIPE meeting, we have installed a network
delay alarm on some of the test-boxes.  This means that you might receive
emails that look like:

..............................................................................

Date: Fri, 15 Oct 1999 15:07:02 GMT
From: ttraffic at ripe.net
To: henk at ripe.net
Subject: Testbox ALARM SET on geuzenveld.ripe.net
Reply-To: ops-tt at ripe.net


The testbox alarm program on geuzenveld.ripe.net found:

TB 27 at 940000021 ALARM SET   old: Go Up, new: Alarm
TB 27 at 940000021 Long: 10108  75.0/ 83.5/125.0 Short: 42 137.0/141.5/149.0

This message has been sent to: tt27 geuzenveld

For an explanation of this email please see
http://www.ripe.net/test-traffic/Host_testbox/alarm.html

..............................................................................

The most important line is the one starting "TB 27 at 94000021 Long:
10108".  It says that for the last 10108 delay measurements from test-box
tt27 to test-box tt01 (a.k.a. geuzenveld) there was a median delay of 83.5
ms, with 5% of the measurements below 75.0 or above 125 ms.

For the last 42 measurements, this delay suddenly increased to a median
delay of 141.5, with 5% below 137 ms or above 149 ms. This might indicate
that something changed in the network between tt27 and tt01.  For a full
explanation, please follow the URL.

The message will be sent to the contact persons for tt27 and geuzenveld.

If you don't have time to look at these messages, feel free to discard
them.

If you do have time and are aware that something changed in your network
at the time the alarm was set or reset, please send me mail.

At the moment, only mails for connections to tt01 will be generated. The
expected number of mails is less than 0.5/day, though this will depend on
the stability and load of your network connections.

We plan to keep this setup running for a week or so, in order to make sure
that the number of alarms generated is indeed small and related to real
network events. If this is successful, the alarm will be installed on all
test-boxes.

Please do not hesitate to contact me if you have any further questions,

Henk

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Henk Uijterwaal                    Email: henk.uijterwaal at ripe.net
RIPE Network Coordination Centre     WWW: http://www.ripe.net/home/henk
Singel 258                         Phone: +31.20.535-4414,  Fax -4445
1016 AB Amsterdam                   Home: +31.20.4195305
The Netherlands                   Mobile: +31.6.55861746  
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