[mrtg] Re: 32 versus 64 bit counters
cmilhans at brocade.com
Mon Sep 16 15:14:47 MEST 2002
I am sorry for this newby type of question.
How do you determine what the polling interval should be when using 32bit
and/or 64 bit counters and monitoring speeds of 2 Gbps? I am trying to
monitor fibre channel switches that use both 1 Gbps and 2 Gbps speeds. I
understand that the counters go from 0 to max value and then go back to 0.
From: tony bourke [mailto:tony at vegan.net]
Sent: Sunday, September 15, 2002 9:37 PM
To: Charles Milhans
Cc: 'mrtg at list.ee.ethz.ch'
Subject: Re: [mrtg] 32 versus 64 bit counters
Alex is right, 32 bit counters are much more reliable. You should
probably only use a 64 bit counter if you have need to measure bandwidth
greater than 115 Mbps (assuming a 5-minute polling interval), since 32-bit
counters can't handle more than that accurately.
Fri, 13 Sep 2002, Charles Milhans wrote:
> Is there much difference in capturing performance data with MRTG using 32
> bit compared to 64 bit counters? I found two different MIB definitions
> performance data on the same port but one definition is specified in 32
> counters and the other is in 64 bit counters.
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