From owner-freebsd-net  Tue Oct  2 13: 2:41 2001
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Date: Tue, 02 Oct 2001 22:02:27 +0200
From: Juan Fco Rodriguez Hervella <jrh@it.uc3m.es>
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To: Lista <freebsd-net@freebsd.org>
Subject: Re: How to increase TCP and UDP buffers (for IPv4/IPv6)
References: <200110021551.f92Fpjr25843@iguana.aciri.org>
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Luigi Rizzo wrote:
> 
> > Hi:
> >
> > It's possible to increase the TCP and UDP buffers ?
> >
> > I've had problems with UDP packets of 64 bytes discarded with a bandwith
> > of 2-3 Mbits, using a FreeBSD-4.3 router in a link of 10 Mbits.
> 
> a router does not buffer through traffic in a socket buffer (which is
> what "TCP and UDP buffers" are) but on the interface queues and ipintrq,
> which are typically 50 packets.
> If this is the case you should see ipintrq drops listed
> with
> 
>         sysctl net.inet.ip.intr_queue_drops
> 
> and you could try to increase the size of that queue with something like
> 
>         sysctl -w net.inet.ip.intr_queue_maxlen=100
> 
>         cheers
>         luigi

What's the meaning of "ipintrq" ?
and it's possible to modify the interface queues in Linux ?

How many queues exists between the interface and the application ?
Are the same to transmit and to receive ?

Thank you very much.
-- 
*********************************
Juan F. Rodriguez Hervella
Universidad Carlos III de Madrid
********************************

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