[mrtg] Re: Interpreting stats from Cisco router

Daniel J McDonald dmcdonald at digicontech.com
Tue Jun 12 22:49:06 MEST 2001

>We have a full T1 and a Cisco router.  I'm using MRTG to monitor Serial0
>and it reports the following for the day:
>Max  In: 184.7 kB/s (96.2%)   Average  In: 46.5 kB/s (24.2%)

Part of the problem is that you are counting bytes while the ISP is counting
bits. Use options[_]: bits to see numbers that your ISP also uses.  You
might also ask them how often they sample (5 minutes, 1 minute, 30 minutes?)
so that you can match their interval as well.

>What is considered high utilization for a T1 and time for upgrading?

That's a very subjective question.  If you see the line is often "pegged"
full, you probably need to upgrade  if you have a yearly growth graph that
shows you are increasing your bandwidth utilization as time goes on, you
probably want to consider when you are going to fill the pipe.  5 minute
averages are probably good enough to tell you that information.

Daniel J McDonald - CCIE 2495, CNX
Principal Network Specialist
Digicon Technologies
dmcdonald at digicontech.com

Digicon - A Cisco Systems Partner, Silver Certified.

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