Date: Sat, 29 Dec 2001 21:02:20 +0000 From: Pete French <pfrench@firstcallgroup.co.uk> To: freebsd-stable@freebsd.org Subject: curious network performance under 4.5-PRE Message-ID: <E16KQcW-0009gp-00@mailhost.firstcallgroup.co.uk>
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I am running a Compaq AP400 workstation under 4.5-PRE which has its internal ethernet card connected to a 512k/bit cable modem. It also has a second card (both fxp cards) connected to a hhub and a number of other machines hanging off the hub, running a variety of windows and Unix operating systems (though no other FreeBSD machines currently). The box is running natd to give access to the internet to the other machines. If I transfer a large file from a well connected machine to one of the boxes on the home network I get pretty much the full 512kbiit/s. If I do the same (same file, same remote machine) frm the freeBSD box itself I only get about 80% of this tops! This makes no sense to me at all - I would have expected the downstream machines to have worse performance than the directly connected one. These measurements are repeatable too, so its not s fluke of traffic. Does anyone have any ideas whats going on ? I dont know if this effect is specific to 4.5-PRE, as I only started doing the large transfers as part of my testing of it, if this is a red-herring for -stable and some well know effect existing in all versions then my appologies. But its certainly puzzling (and not a little exasperating!) -pcf. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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