> 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" ?
it is a queue used to store incoming IP packets.
> and it's possible to modify the interface queues in Linux ?
no idea.
> How many queues exists between the interface and the application ?
basically 3 on input (device queue, ipintrq and socket buffer),
and 1 or 2 on output (device queue and in some cases the socket buffer)
> Are the same to transmit and to receive ?
no
cheers
luigi
----------------------------------+-----------------------------------------
Luigi RIZZO, [EMAIL PROTECTED] . ACIRI/ICSI (on leave from Univ. di Pisa)
http://www.iet.unipi.it/~luigi/ . 1947 Center St, Berkeley CA 94704
Phone: (510) 666 2927
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