Date: Thu, 3 Feb 2000 10:56:23 -0500 (EST) From: "Matthew N. Dodd" <winter@jurai.net> To: "Pedro J. Lobo" <pjlobo@euitt.upm.es> Cc: Jasper Wallace <jasper@ivision.co.uk>, Mike Nowlin <mike@argos.org>, freebsd-net@FreeBSD.ORG Subject: Re: 802.1Q VLANs Message-ID: <Pine.BSF.4.21.0002031052090.479-100000@sasami.jurai.net> In-Reply-To: <Pine.OSF.4.21.0002031230560.29874-100000@haddock.euitt.upm.es>
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On Thu, 3 Feb 2000, Pedro J. Lobo wrote: > if_fxp does have to be patched. You have to tell the card not to drop > frames with errors (oversized frames among them) or you won't receive > packets with sizes from 1497 to 1500 bytes (remember that 802.1Q adds 4 > bytes to each frame). Then you have to drop by hand undersized frames and > frames with crc errors. If the size of our header increases then the payload we can carry decreases. Violating ethernet frame lengths doesn't strike me as a good idea. Besides, there is little we can do about hardware that doesn't allow us to send/receive larger packets. -- | Matthew N. Dodd | '78 Datsun 280Z | '75 Volvo 164E | FreeBSD/NetBSD | | winter@jurai.net | 2 x '84 Volvo 245DL | ix86,sparc,pmax | | http://www.jurai.net/~winter | This Space For Rent | ISO8802.5 4ever | To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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