From: Joseph Brunner (joe@affirmedsystems.com)
Date: Wed Oct 03 2007 - 15:59:49 ART
Repost of my previous helpful answer... (you can search the archives for
peoples answers...)
From 8/26/07
Output queue length is not measured in difference over time (delta). It's a
single query run at a single instant, and matched against a threshold.
In this way its like CPU. It's a simple integer. We don't care about the
last integer...
This is the use of "absolute".
From now:
The delta is to monitor a change that occurs such as "rising and falling".
You'll see those words a lot in delta tasks, where we need to watch for
thresh A and then watch for it to ball back below thresh B. In you're
example we are watching the CHANGE OVER TIME (classic delta)
-Joe
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Andy
Cole
Sent: Wednesday, October 03, 2007 2:55 PM
To: Cisco certification
Subject: RMON Absolute or Delta ?
When configuring RMON you need to choose between Absolute or Delta. I
pick the wrong one about half the time, (might be better off just
flipping a coin).
The way I remember which does what:
Delta = Difference
Absolute = Fixed number
Task:
The network administrator has requested that R1 log an event when the
interface input octets value reaches 45000 per minute and when the value
falls back below 35000 per minute.
In my mind these are absolute numbers (45000 & 35000) But the solution
calls for Delta.
I need help understanding when to use Absolute and when to use Delta.
Andy
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