Date: Fri, 20 Mar 2015 23:50:33 +0100 From: Willem Jan Withagen <wjw@digiware.nl> To: =?UTF-8?B?VmFpZGFzIERhbW/FoWV2acSNaXVz?= <vd@par.lt>, Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: Troubles with 'em' driver and UDP packets Message-ID: <550CA439.7040500@digiware.nl> In-Reply-To: <E7950DC4-C046-4E18-B4EE-8B31A530E755@par.lt> References: <7F780FA4-E826-4C83-98CC-549FECEDA35E@par.lt> <CAOgwaMuSMVc-pEMB%2BRuqqdiCuBbwuLfpBPF-Oh54R==y-KjtFQ@mail.gmail.com> <E7950DC4-C046-4E18-B4EE-8B31A530E755@par.lt>
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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 <m.e.sanliturk@gmail.com> 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
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