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 From:  "Mitch \(WebCob\)" <mitch at webcob dot com>
 To:  "ALFREDO GONZALEZ" <got2go at msn dot com>, m0n0wall at lists dot m0n0 dot ch
 Subject:  RE: [m0n0wall] Status: Inteface question
 Date:  Sat, 30 Oct 2004 14:16:22 -0700
> 2- For total traffic, you could write some scripot to query the SNMP
> interface/counter every 5 minutes or so. Basically, every time the script
> runs, it reads the counter values from the interface, then calculates the
> delta from the last value, if the delta is negative, then the counter has
> re-set, so  then add the current value to the difference between the last
> value and 4294967295. Then write this number down. Perhaps as
> variables in a
> text file.
>

5 minutes is the standard for 100Mb feeds... you have to go faster if you
have a 1Gb interface.

This is exactly what MRTG is intended to do. Produces pretty graphs too ;-)

There are a couple other systems that do similar - some log to DB, etc.

m/