[mrtg] Re: 32 versus 64 bit counters

[Charles Milhans]

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.

Thanks,

Charlie Milhans

-----Original Message-----
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


Hi Charles,

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.

Tony


On 
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
for
> performance data on the same port but one definition is specified in 32
bit
> counters and the other is in 64 bit counters.
> 
> 
> 
> 
> --
> Unsubscribe mailto:mrtg-request at list.ee.ethz.ch?subject=unsubscribe
> Archive     http://www.ee.ethz.ch/~slist/mrtg
> FAQ         http://faq.mrtg.org    Homepage     http://www.mrtg.org
> WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi
> 

-- 
-------------- -- ---- ---- --- - - - -  -  -- -  -  -  -   -     -
Tony Bourke				tony at vegan.net




--
Unsubscribe mailto:mrtg-request at list.ee.ethz.ch?subject=unsubscribe
Archive     http://www.ee.ethz.ch/~slist/mrtg
FAQ         http://faq.mrtg.org    Homepage     http://www.mrtg.org
WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi