Date: Tue, 2 Oct 2001 08:51:45 -0700 (PDT) From: Luigi Rizzo <rizzo@aciri.org> To: jrh@it.uc3m.es (Juan Fco Rodriguez Hervella) Cc: freebsd-net@FreeBSD.ORG Subject: Re: How to increase TCP and UDP buffers (for IPv4/IPv6) Message-ID: <200110021551.f92Fpjr25843@iguana.aciri.org> In-Reply-To: <3BB9E199.D7CC5EC9@it.uc3m.es> from Juan Fco Rodriguez Hervella at "Oct 2, 2001 5:47:37 pm"
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> 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 ----------------------------------+----------------------------------------- Luigi RIZZO, luigi@iet.unipi.it . ACIRI/ICSI (on leave from Univ. di Pisa) http://www.iet.unipi.it/~luigi/ . 1947 Center St, Berkeley CA 94704 Phone: (510) 666 2927 ----------------------------------+----------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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