Date: Thu, 04 Oct 2001 08:38:54 -0400 From: Mike Tancsa <mike@sentex.net> To: rizzo@aciri.org (Luigi Rizzo) Cc: freebsd-net@freebsd.org Subject: Re: How to increase TCP and UDP buffers (for IPv4/IPv6) Message-ID: <21morto01so4jkebem9s5t1tf6ohm1uple@4ax.com> In-Reply-To: <SEN.1002038084.456790829@news.sentex.net> References: <3BB9E199.D7CC5EC9@it.uc3m.es> <SEN.1002038084.456790829@news.sentex.net>
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On Tue, 2 Oct 2001 15:54:44 +0000 (UTC), in sentex.lists.freebsd.net you wrote: >> Hi: >>=20 >> It's possible to increase the TCP and UDP buffers ? >>=20 >> 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=3D100 Hi, Are there any nasty side effects for increasing this value ? Also, how would one go about tracking down why net.inet.ip.intr_queue_drops is incrementing ? ---Mike Mike Tancsa (mdtancsa@sentex.net) =09 Sentex Communications Corp, =09 Waterloo, Ontario, Canada "Given enough time, 100 monkeys on 100 routers=20 could setup a national IP network." (KDW2) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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