From owner-freebsd-net Thu Feb 3 7:58: 9 2000 Delivered-To: freebsd-net@freebsd.org Received: from sasami.jurai.net (sasami.jurai.net [63.67.141.99]) by builder.freebsd.org (Postfix) with ESMTP id 8A2493EFE for ; Thu, 3 Feb 2000 07:58:05 -0800 (PST) Received: from localhost (winter@localhost) by sasami.jurai.net (8.9.3/8.8.7) with ESMTP id KAA50942; Thu, 3 Feb 2000 10:56:23 -0500 (EST) Date: Thu, 3 Feb 2000 10:56:23 -0500 (EST) From: "Matthew N. Dodd" To: "Pedro J. Lobo" Cc: Jasper Wallace , Mike Nowlin , freebsd-net@FreeBSD.ORG Subject: Re: 802.1Q VLANs In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org 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