From owner-freebsd-stable@FreeBSD.ORG Wed Aug 29 20:17:44 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 312A41065674 for ; Wed, 29 Aug 2012 20:17:44 +0000 (UTC) (envelope-from cochard@gmail.com) Received: from mail-wi0-f172.google.com (mail-wi0-f172.google.com [209.85.212.172]) by mx1.freebsd.org (Postfix) with ESMTP id B3D878FC0A for ; Wed, 29 Aug 2012 20:17:43 +0000 (UTC) Received: by wicr5 with SMTP id r5so5194586wic.13 for ; Wed, 29 Aug 2012 13:17:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:cc:content-type; bh=S7rOW0ZFrBZVP+OkFqjsOZPONeh6NPOR/FqkLoUU7d0=; b=HSYomnjVwH0lldbVxbcXJQqkYfGnbk2rKx7SX3zd0KtC+neWLCEgOxtfMHHjEO9/TS lpUZW79Ekj07bq3C9rex99VBq6FMgG//IbSIsjNDTzy3FD5SwSyJdIolGL0fwRnI2q6B zQHryJ3hPukIrR659dr2HsulryLVfHCZIKrWzg9rOQhejFEWgfZdn8B/9qCy/0+hmAzB 52pug3Pw4OeklVHncijiuyUBZ0ghxXpmRIVjxJFTCRxg2cS0E6HojCAzyautDrU627CC PWVXaWZChYnneFPBQaw8rQMQzspsPtxFNCez4e0dyvazZkPvXvEW1l0RvcEd91aERKRF 1d2Q== Received: by 10.180.106.97 with SMTP id gt1mr42672501wib.5.1346271457481; Wed, 29 Aug 2012 13:17:37 -0700 (PDT) MIME-Version: 1.0 Sender: cochard@gmail.com Received: by 10.223.153.200 with HTTP; Wed, 29 Aug 2012 13:17:17 -0700 (PDT) In-Reply-To: <503E5C14.9090001@yahoo.de> References: <503CE60F.8040007@yahoo.de> <503E5C14.9090001@yahoo.de> From: =?ISO-8859-1?Q?Olivier_Cochard=2DLabb=E9?= Date: Wed, 29 Aug 2012 22:17:17 +0200 X-Google-Sender-Auth: dhi_wOXDV1_BoRIvc-m984FRdps Message-ID: To: Norbert Aschendorff Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-stable@freebsd.org Subject: Re: IPv4 vs. IPv6 Ethernet Performance X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 Aug 2012 20:17:44 -0000 On Wed, Aug 29, 2012 at 8:14 PM, Norbert Aschendorff wrote: > This confirms the FreeBSD IPv6 receive rate measured with Linux as > sender (iperf client). > Hi, Last time I've played with IPerf and IPV6 between my FreeBSD machines, he didn't take care of the IPv6 Ethernet MTU (1480 and not 1500), neither the IPv6 size header and send 1470 bytes datagrams in place of 1430 bytes datagrams: All my IPerf generated IPv6 packets were fragmented, and this fragmentation reduce a lot's the throughput in IPv6 mode. Can you check if this problem was fixed ? Regards, Olivier