From: Guyler, Rik (rguyler@shp-dayton.org)
Date: Wed Nov 14 2007 - 22:15:51 ART
Alex, any time you are comparing rates of change that is delta time.
Here you are comparing the number of errors in a given timeslice and
triggering some event based on high and low threshholds.
The absolute value of the interface errors would be the total number of
errors reported in the counters and not a sample taken at set intervals.
If the question had required you to configure an event to be written to
the log when the total number of errors reaches 100,000 then an absolute
reading configuration would have been correct.
Rik
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Alex Steer
Sent: Wednesday, November 14, 2007 5:34 PM
To: ccielab@groupstudy.com
Subject: simple rmon absolute/delta question
Hi,
I recently had the question below and got it wrong because I configured
an absolute instead of a delta reading. I'm abit worried I have
misunderstood the meaning of delta and absolute. Can some one clear
this up for me please?
Many thanks
Alex
(word for word question below)
The Network administrator has requested that R1 log an event when the
interface input octets (ifEntry.10.1) value reaches 45000 per minute and
when the value falls back below 35000 per minute.
The sampling interval should be every 60 seconds
When the 45000 threshold is breached an events should be generated that
reads "Rising above 45000 for ifInOctets"
When the value falls back to 35000 an event should be generated that
reads "Rising above 45000 for ifInOctets"
The server to log these events to is 129.X.58.100
Ensure these messages are time stamped with the system's current time
including the millisecond
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