From owner-freebsd-net@FreeBSD.ORG Fri Mar 20 22:51:07 2015 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 95BE64E8 for ; Fri, 20 Mar 2015 22:51:07 +0000 (UTC) Received: from smtp.digiware.nl (smtp.digiware.nl [31.223.170.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4FF2E97B for ; Fri, 20 Mar 2015 22:51:06 +0000 (UTC) Received: from rack1.digiware.nl (unknown [127.0.0.1]) by smtp.digiware.nl (Postfix) with ESMTP id 16E9F16A404; Fri, 20 Mar 2015 23:50:58 +0100 (CET) X-Virus-Scanned: amavisd-new at digiware.nl Received: from smtp.digiware.nl ([127.0.0.1]) by rack1.digiware.nl (rack1.digiware.nl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fWIPdrTiwE0y; Fri, 20 Mar 2015 23:50:31 +0100 (CET) Received: from [192.168.10.211] (unknown [192.168.10.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.digiware.nl (Postfix) with ESMTPSA id 8782B16A402; Fri, 20 Mar 2015 23:50:31 +0100 (CET) Message-ID: <550CA439.7040500@digiware.nl> Date: Fri, 20 Mar 2015 23:50:33 +0100 From: Willem Jan Withagen User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: =?UTF-8?B?VmFpZGFzIERhbW/FoWV2acSNaXVz?= , Mehmet Erol Sanliturk Subject: Re: Troubles with 'em' driver and UDP packets References: <7F780FA4-E826-4C83-98CC-549FECEDA35E@par.lt> In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Cc: freebsd-net@freebsd.org X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Mar 2015 22:51:07 -0000 On 20/03/2015 10:42, Vaidas Damoševičius wrote: > It's not cabling problem :) > > Another example with -b and -i : > > vd@v0s4:~ % iperf3 -u -c 1.2.3.4 -i4 -b1000m -P1 > Connecting to host 1.2.3.4, port 5201 > [ 4] local 1.2.3.3 port 10672 connected to 1.2.3.4 port 5201 > [ ID] Interval Transfer Bandwidth Total Datagrams > [ 4] 0.00-4.00 sec 446 MBytes 935 Mbits/sec 1761605 > [ 4] 4.00-8.00 sec 457 MBytes 958 Mbits/sec 1809551 > [ 4] 8.00-10.00 sec 228 MBytes 958 Mbits/sec 900740 > - - - - - - - - - - - - - - - - - - - - - - - - - > [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams > [ 4] 0.00-10.00 sec 1.10 GBytes 949 Mbits/sec 770.668 ms 0/35 (0%) > [ 4] Sent 35 datagrams > > Result is totaly different. > >> On 20 Mar 2015, at 11:29, Mehmet Erol Sanliturk wrote: >> I think you use Gigabit CROSS cable ( cat 5e or cat 6 ) . >> CROSS cable is required if connection is from computer to computer . >> >> Only for remaindering . to the best of my knowledge: The standard for 1Gbit requires the media interface to do crossover automagically, thus removing the requirement for X-cables. And that also holds for computer <> computer connections. --WjW