From owner-freebsd-hackers@FreeBSD.ORG Wed Jun 27 00:52:55 2007 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 5833D16A41F for ; Wed, 27 Jun 2007 00:52:55 +0000 (UTC) (envelope-from george@mail.reprise.com) Received: from reprise.com (69-30-97-91.dv1mn.easystreet.com [69.30.97.91]) by mx1.freebsd.org (Postfix) with ESMTP id 1683D13C44B for ; Wed, 27 Jun 2007 00:52:55 +0000 (UTC) (envelope-from george@mail.reprise.com) Received: from mail.reprise.com (localhost [127.0.0.1]) by reprise.com (8.13.8/8.13.8) with ESMTP id l5R0XkoR084993 for ; Tue, 26 Jun 2007 17:33:46 -0700 (PDT) Received: (from george@localhost) by mail.reprise.com (8.13.8/8.13.8/Submit) id l5R0Xkf9084990; Tue, 26 Jun 2007 17:33:46 -0700 (PDT) (envelope-from george) Date: Tue, 26 Jun 2007 17:33:46 -0700 (PDT) Message-Id: <200706270033.l5R0Xkf9084990@mail.reprise.com> From: george+freebsd@m5p.com To: freebsd-hackers@freebsd.org X-Spam-Score: -3.977 () ALL_TRUSTED,BAYES_00 X-Scanned-By: MIMEDefang 2.57 on 69.30.97.91 Subject: Gigabit Ethernet w/Jumbo Frames X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Jun 2007 00:52:55 -0000 I'm having poor luck trying to use NFS over a gigabit ethernet using jumbo frames. By all indications, my switch (Netgear GS608) forwards jumbo frames with no difficulty, but my Realtek 8169-based cards seem unreceptive to the idea, giving many watchdog timeouts and other obscure log messages. One server is amd64 and my clients are i386, but I think I've ruled that out as the problem because I see errors evern with an i386 server. So I strongly suspect my network cards at the moment. What gigabit ethernet cards do you use for reliable performance with jumbo frames? -- George Mitchell