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Date:      Mon, 15 Apr 2002 03:24:32 -0700
From:      Luigi Rizzo <rizzo@icir.org>
To:        Mihail Balikov <misho@interbgc.com>
Cc:        freebsd-ipfw@FreeBSD.ORG
Subject:   Re: dummynet and ip.fw.one_pass
Message-ID:  <20020415032432.A24198@iguana.icir.org>
In-Reply-To: <000901c1e45c$6f89a3a0$eee209d9@interbgc.com>
References:  <003401c1e419$70e73340$eee209d9@interbgc.com> <20020414221105.B21946@iguana.icir.org> <000901c1e45c$6f89a3a0$eee209d9@interbgc.com>

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i do not follow your reasoning -- there is no "burst"
parameter in the pipe configuration.

	cheers
	luigi

On Mon, Apr 15, 2002 at 12:03:40PM +0300, Mihail Balikov wrote:
> in configuration:
> 
> ipfw pipe 1 config bw 1Mbit/s
> ipfw queue 2 config pipe 1 weight 1 mask dst-ip 0x000000ff
> ipfw add queue 2 ip from any to 1.2.3.0/24
> ipfw pipe 3 config bw 64Kbit/s burst 128Kbit/s mask dst-ip 0x000000ff
> ipfw add 3 pipe 3 ip from any to 1.2.3.0/24
> 
> is it correct following logic:
> 
> if (  (packet & M_DUMMYNET) &&               /* packet has passed through
> pipe ==> pipe 2 */
>     ! (packet & M_DUMMYNET_DELAIED))  /* packet has not been delaied by pipe
> 2 */
> {
>             allow_burst_upto(128Kbit/s);
> } else {
>             exact_shape(64Kbit/s);
> }
> 
> regards,
> Mihail
> 
> 
> 
> ----- Original Message -----
> From: "Luigi Rizzo" <rizzo@icir.org>
> To: "Mihail Balikov" <misho@interbgc.com>
> Cc: <freebsd-ipfw@FreeBSD.ORG>
> Sent: Monday, April 15, 2002 8:11 AM
> Subject: Re: dummynet and ip.fw.one_pass
> 
> 
> > the code seems correct, but I would do the shaping in the opposite
> > order so that a single host won't be able to monopolise the 1Mbit
> > that you allow for the network.
> >
> > Secondly, this seems to be a good use for fair queueing, where
> > you want equal sharing of the 1Mbit/s bandwidth:
> >
> > ipfw pipe 1 config bw 1Mbit/s
> > ipfw queue 2 config pipe 1 weight 1 mask dst-ip 0x000000ff
> >
> > ipfw add queue 2 ip from any to 1.2.3.0/24
> >
> > (you do not need fw_one_pass=0 in this case)
> >
> > cheers
> > luigi
> >
> > On Mon, Apr 15, 2002 at 04:04:06AM +0300, Mihail Balikov wrote:
> > > Hi,
> > >
> > > is it correct to use such configuration :
> > >
> > > sysctl -w net.inet.ip.fw.one_pass=0
> > >
> > >   # process only outgoing packets
> > > ipfw add 10 allow all from any to any in
> > >   # shape whole network to 1Mb/s
> > > ipfw add 15 pipe 15 all from any to 1.2.3.0/24
> > > ipfw pipe 15 config bw 1Mbit/s
> > >   # shape every host to 64Kb/s
> > > ipfw add 20 pipe 20 all from any to 1.2.3.0/24
> > > ipfw pipe 20 config mask dst-ip 0x000000ff bw 64Kbit/s
> > >   # transmit packet
> > > ipfw add 30 allow all from any to any
> > >
> > > regards,
> > > Mihail
> > >
> > >
> > > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > > with "unsubscribe freebsd-ipfw" in the body of the message
> >
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-ipfw" in the body of the message
> >
> 

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