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Date:      Sat, 4 Nov 2000 08:21:20 -0800 (PST)
From:      "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net>
To:        dwmalone@maths.tcd.ie (David Malone)
Cc:        noor@comrax.com, freebsd-stable@FreeBSD.ORG
Subject:   Re: Log total bandwidth used.
Message-ID:  <200011041621.IAA76740@gndrsh.dnsmgr.net>
In-Reply-To: <20001104154233.A51080@walton.maths.tcd.ie> from David Malone at "Nov 4, 2000 03:42:33 pm"

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> On Sat, Nov 04, 2000 at 11:36:09AM +0200, noor@comrax.com wrote:
> 
> > Using ipfw, is there a way to add a rule to compute all bandwidth used
> > during one day? The rule would just compute the bandwidth, then move on
> > to the next rule.
> 
> You could just add a rule which says "count ip from any to any" and
> look at the byte counts each day with "ipfw show".

And understand just what it is this rule is counting.  It will be triggered
each time a packet arrives on an interface and each time a packet is sent
on an interface, ie, if the box is a router traffic _ROUTED_ through it
will be counted twice, traffic termininated on the router will be counted
once.

If you just want your upstream byte count add a ``via XXX'', if you
want to seperate input and output by interface use a rule set more
like:
ipfw add 1 count ip from any to any in via dc0
ipfw add 1 count ip from any to any out via dc0
ipfw add 2 count ip from any to any in via dc1
ipfw add 2 count ip from any to any out via dc1

> 
> (Just a niggly thing, but bandwidth is usually measured in something
> like bytes/second, so "all the bandwidth used during one day"
> doesn't make so much sense. You probably mean "the average bandwidth
> used during the day" or "the total volume transfered during the
> day").

If you want a real bandwidth tool use snmp and mrtg.


-- 
Rod Grimes - KD7CAX @ CN85sl - (RWG25)               rgrimes@gndrsh.dnsmgr.net


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