[nsp] SNMP ifInOctets/ifOutOctets

[Bulger, Tim]

I could be wrong here, but I believe the equation provided is for
computing utilization as a percentage of the total available bandwidth,
as opposed to utilization as the actual traffic that passed through an
interface.  I think the *100 fixes the decimal place for a properly
graphed percentage.  But to answer your original question, ifInOctets
and ifOutOctets represent 8 bit bytes.


-----Original Message-----
From: Sean Mathias [mailto:seanm at prosolve.com] 
Sent: Friday, January 17, 2003 6:51 PM
To: cisco-nsp at puck.nether.net
Subject: [nsp] SNMP ifInOctets/ifOutOctets


Can someone explain what unit an octet represents in the Cisco IF-MIB
implementation?  I would assume it to be an 8-bit (octet) word, but
based on the formula to compute bandwidth usage using SNMP on CCO, that
appears to be wrong.

Here is the article:

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a
008009496e.shtml

The formula is:

max(Delta(ifInOctets), Delta(ifOutOctets)) x 8 x 100
------------------------------------------------------------------------
---
            (number of seconds) x ifSpeed

Where does the x 100 come from and what does it represent?

Sean Mathias
Senior Infrastructure and Security Engineer
Prosolve
http://www.prosolve.com
v. (206) 306-2525
f. (206) 306-2526



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