Date: Fri, 31 Oct 2003 01:01:17 -0500 From: Keith Mitchell <kmitch@guru.org> To: freebsd-net@freebsd.org Subject: iMac and FreeBSD performance problems Message-ID: <20031031060117.GA77018@weenix.guru.org>
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Hi, I'm trying to figure out why my FreeBSD box and my iMac are having trouble communicating at 100 Mbs full-duplex. To briefly describe my LAN setup, I have a 16port linksys 10/100 ethernet switch connected to two FreeBSD systems, an iMac, a PC and some other miscellaneous stuff. Everything works fine except the interaction between the iMac and the FreeBSD machines. What I see is extremely slow transfers (FTP/TFTP at least) from the FreeBSD machines to the iMac. The reverse direction (from the iMac to the FreeBSD machiens work fine). If this isn't bad enough, if I connect the iMac to a 10BT hub instead of the ethernet switch then everything seems to work fine as well. The iMac can talk to all the other equipment without a problem when its connected to the ethernet switch. Likewise the FreeBSD machines can talk to each other without any problems and to all of the other networking equipment.... they just can't talk to the iMac efficiently. I just noticed this problem but I am not sure how long it has existed since I just started having a need to transfer large chunks of dat between the iMac and the FreeBSD machines. I have tried various versions of FreeBSD all with the same affect (4.6, 4.7, 4.9, 5.1). The iMac is currently running 10.3 (which is supposedly roughly equivalent to FreeBSD 5). I also saw the samething with the 10.2 release though. The FreeBSD machines are using Dec21140 based 10/100 ethernet cards and it doesn't seem to matter if I use the GENERIC kernel or a custom kernel with all the extra stuff removed. I have also tried a different Linksys ethernet switch with the same results. I don't have another vendor to try unfortunately. Anyone have any clues on this bizarre problem? -- Keith Mitchell Email: kmitch@guru.org PGP key available upon request
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