|Subject:||[nv-l] bandwidth utilization calculations..|
|From:||"John M Gatrell" <John.Gatrell@uk.ibm.com>|
|Date:||Thu, 3 Jul 2003 10:32:18 +0100|
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I'm surprised if your gigabit is actually half duplex. Fibre versions tend to be full duplex,
one fibre in, one fibre out. Copper versions can probably negotiate full duplex.
I normally measure BandwidthUtil-In and BandwidthUtil-Out separately to
avoid whether it's half or full duplex.
Now bandwidth percentage = 8 * 100 * Octets / Speed
Are you looking at the raw data, or trying to do this in mibExpr.conf?
I think that you don't need to divide ifInOctets by the 60 sec interval,
if using mibExpr.conf. The type of the field means that the sample time
division is done for you. This means that the formula does not have to be adjusted
if one sample was missed.
So I think you should be dividing by 1,000,000,000 not by 60,000,000,000
So my mibExpr.conf looks like
"8*100* ifInOctets / ifSpeed" \
.18.104.22.168.22.214.171.124.1.5. / \
John Gatrell, B.A. Physics, CCNA
RMSC - IBM UK's Remote Managed Services Centre
Tel: 01932-81-4732 Internal 814732
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