Date: Fri, 29 Mar 2002 16:56:10 +0100 From: "Pelhrimovszky, Zsolt" <Pelhrimovszky.Zsolt@evosoft.hu> To: stable@FreeBSD.ORG, net@FreeBSD.ORG Subject: Mystic network behaviour Message-ID: <3CA48E9A.603B7040@evosoft.hu>
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Hi, in the past months we had a lot of network problems with our new FreeBSD gateway. These were network slowdowns. Playing with sysctls (rfc1323, newreno, syncookies, delayed_ack ..) didn't help. We upraded the system from 4.4 stable, up to 4.5 stable 2 weekly, downgraded it to 4.5 Release p2, but the slowdown still remained. The gateway has two interfaces: tx0 and tx1. tx0 was connected to 10Mb hub (towards to our ISPs router with 512Kbit leased line), tx1 to an 100MB switch (internal lan). The throughput was usually so much, that it filled the 512k bandwith. There were enough mbufs and other nerwork resources, the system does only gatewaying. The slowdown was caused by input errors on the tx0 interface (1-2 new errors per second, output from netstat -ni). Reinitialising it with ifconfig down and up stopped these errors for some time (from 2 minutes up to 2-3 days). Setting manually the ifconfig parameters (media, and mediaopts) also didn't help. The final solution was, that we changed the 10Mb hub to an 100MB switch, and now it works fine. Has anybody some ideas what was worng? Is a defect somewere in the FreeBSD ip-stack, or network driver implementation? Regards, Zs. Pelhrimovszky To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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