From owner-freebsd-hackers Mon May 13 12:49:20 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from root.com (nexus.root.com [209.102.106.178]) by hub.freebsd.org (Postfix) with ESMTP id BDF2837B408 for ; Mon, 13 May 2002 12:49:15 -0700 (PDT) Received: (from dg@localhost) by root.com (8.11.2/8.11.2) id g4DJm7v82903; Mon, 13 May 2002 12:48:07 -0700 (PDT) (envelope-from dg) Date: Mon, 13 May 2002 12:48:07 -0700 From: David Greenman-Lawrence To: Terry Lambert Cc: Matthew Dillon , jamie@tridentmicrosystems.co.uk, freebsd-hackers@FreeBSD.ORG Subject: Re: Broadcom BCM5701 Chipset problems Message-ID: <20020513124807.R72322@nexus.root.com> References: <20020513115600.A50967@mufuf.trident-uk.co.uk> <3CDFF60C.48A2EA65@mindspring.com> <20020513102526.H72322@nexus.root.com> <200205131758.g4DHwJFj068941@apollo.backplane.com> <3CE00B14.E8CA43A8@mindspring.com> <200205131901.g4DJ1U8s069604@apollo.backplane.com> <3CE01595.D045B70D@mindspring.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3CE01595.D045B70D@mindspring.com>; from tlambert2@mindspring.com on Mon, May 13, 2002 at 12:35:49PM -0700 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG >> :Can you guys elaborate on the problem? Was it on incoming checksums, >> :outgoing checksums, or both? >> >> It was on incoming checksums I believe. > >Was the result a rejected packet that didn't get transferred, or >transferred packets with bad checksums? > >If the latter, then it's workaroundable in software, which might >be worth doing... if only rechecking packets with bad checksums. >I fear the former makes more sense, though. 8-(. The chip would calculate the wrong checksum and basically say the packet was bad when it was good (and by inference, good when it was bad). I was not able to figure out what they got wrong in the algorithm, but if that were known, then it is conceivable that the problem could be fixed in software. -DG David Greenman-Lawrence Co-founder, The FreeBSD Project - http://www.freebsd.org President, TeraSolutions, Inc. - http://www.terasolutions.com President, Download Technologies, Inc. - http://www.downloadtech.com Pave the road of life with opportunities. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message