From owner-freebsd-net@FreeBSD.ORG Tue Dec 25 14:12:30 2007 Return-Path: Delivered-To: freebsd-net@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id ED22C16A419; Tue, 25 Dec 2007 14:12:30 +0000 (UTC) (envelope-from kris@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id D9CD913C44B; Tue, 25 Dec 2007 14:12:30 +0000 (UTC) (envelope-from kris@FreeBSD.org) Received: from freefall.freebsd.org (kris@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.2/8.14.2) with ESMTP id lBPECU5T002615; Tue, 25 Dec 2007 14:12:30 GMT (envelope-from kris@freefall.freebsd.org) Received: (from kris@localhost) by freefall.freebsd.org (8.14.2/8.14.1/Submit) id lBPECU99002600; Tue, 25 Dec 2007 14:12:30 GMT (envelope-from kris) Date: Tue, 25 Dec 2007 14:12:30 GMT Message-Id: <200712251412.lBPECU99002600@freefall.freebsd.org> To: aseelye@eltopia.com, kris@FreeBSD.org, freebsd-net@FreeBSD.org From: kris@FreeBSD.org Cc: Subject: Re: kern/118879: [bge] [patch] bge has checksum problems on the 5703 chipset X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Dec 2007 14:12:31 -0000 Synopsis: [bge] [patch] bge has checksum problems on the 5703 chipset State-Changed-From-To: open->analyzed State-Changed-By: kris State-Changed-When: Tue Dec 25 14:11:09 UTC 2007 State-Changed-Why: This is most likely not a bug unless you can confirm the bad checksums from *ANOTHER* machine on the same link. When hardware checksum offload is in use, the OS does not compute the checksum (it happens in the NIC as the packet is transmitted) so tcpdump sees a "wrong" checksum. See the tcpdump manpage. http://www.freebsd.org/cgi/query-pr.cgi?pr=118879