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From: "Donatas" <donatas@lrtc.net>
To: "Gleb Smirnoff" <glebius@FreeBSD.org>
References: <131b01c55b9a$5fb58530$9f90a8c0@DONATAS>
	<20050518112720.GA6678@cell.sick.ru>
Date: Fri, 20 May 2005 09:02:45 +0300
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cc: freebsd-net@freebsd.org
Subject: Re: ng_bridge fluctuations
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>  Donatas,
>=20
> On Wed, May 18, 2005 at 02:11:43PM +0300, Donatas wrote:
> D> D> ### Regular MRTG monitoring=20
> D> D> 0,10,20,30,40,50 * * * * root /usr/local/etc/mrtg/exec_mrtg.sh > =
/dev/null 2>&1=20
> D> >No-no. The question was: what is the scale of time axis? How long =
does one=20
> D> >peak last?=20
> D> hmm...still difficult to understand your question. well, time axis =
scale is displayed in hours. each new point is added every 10 minutes. =
each point value is read immediately
> D> by mrtg without any averages or somth.
>=20
> So, there is 24 hours between red lines on the image [1]? Then we have =
2 peaks
> per hour, right? May be this is sendmail (or other MTA) processing its =
queue?
>=20
> [1] ftp://temp:temp@217.9.241.242/hatm0.png

your idea seems logical enough....just can't understand why peaks have =
never been detected on incoming interfaces, before ng_bridge? mrtg =
doesn't allways reads current values with precission of seconds....for =
example=20
point 1 - 00:00:15, point 2 - 00:10:37, point 3 - 00:20:24 etc...
you might say that incoming traffic on ethernet interfaces is much =
bigger that incoming traffic bridged to current ngethxxx and it simply =
swallows peaks, but we've done experiments with only one physical and =
one logical bridged interfaces - fluctuations have also been noticed.

anyway, maybe you have any ideas why after doing "ngctl msg ng_bridge: =
setconfig '{ ipfw=3D[1] }', and getconfig showing succesful activation =
of "ipfw =3D [ 1 ]", traffic is not passed to ipfw? bsd 5.3...

thanks...