Date: Mon, 12 Jun 2000 09:53:28 +0200 (SAT) From: Reinier Bezuidenhout <rbezuide@oskar.dev.nanoteq.co.za> To: luigi@info.iet.unipi.it (Luigi Rizzo) Cc: lists@security.za.net, hackers@FreeBSD.ORG Subject: Re: Fastforwarding Message-ID: <200006120753.JAA07838@oskar.dev.nanoteq.co.za> In-Reply-To: <200006120705.JAA13935@info.iet.unipi.it> from Luigi Rizzo at "Jun 12, 2000 9: 5:52 am"
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> > > > Has anyone here tried setting net.inet.ip.fastforwarding on in a high > > traffic enviroment? > > > > This setting DRASTICALLY speeds up transfers between boxes talking through > > a freebsd gateway when you are using 2 100mbit interfaces, but it seems to > > kernel panic the system after a few minutes. > > can you quantify the "drastically" ? > > luigi > This also depends on what 100mbit cards you are using ... we had problems with the Intel ether express cards when using X-over cables (yes :) Intel specs that these cards should NOT be used with X-overs) ... this caused the cards to go in some reset stage where no packets are transfered and the mbufs heap up and eventually could cause a panic. this happend when configured as abridge and doing 100mbit full-duplex transfers, we fixed this by using a switch and removing the X-overs. Also have a look at increasing the mbufs .. I don't know if the mbuf exaustion panic has been fixed .. anyone ?? Reinier To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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