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.sanlit...@gmail.com> > wrote: > > > > On Fri, Mar 20, 2015 at 2:23 AM, Vaidas Damoševičius <v...@par.lt> wrote: > Hello, > > I have 2 boxes with FreeBSD 10.1-RELEASE/amd64 and "Intel(R) PRO/1000 Network > Connection 7.4.2" NIC's directly connected to each other. I noticed strange > problem - I'm loosing small UDP packets under high load. I've tried to test > it with iperf and got the following: > > --- > > vd@v0s4:~ % iperf3 -u -c 1.2.3.4 > Connecting to host 1.2.3.4, port 5201 > [ 4] local 1.2.3.3 port 64254 connected to 1.2.3.4 port 5201 > [ ID] Interval Transfer Bandwidth Total Datagrams > [ 4] 0.00-1.01 sec 120 KBytes 976 Kbits/sec 15 > [ 4] 1.01-2.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 2.01-3.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 3.01-4.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 4.01-5.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 5.01-6.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 6.01-7.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 7.01-8.00 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 8.00-9.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 9.01-10.01 sec 128 KBytes 1.05 Mbits/sec 16 > - - - - - - - - - - - - - - - - - - - - - - - - - > [ ID] Interval Transfer Bandwidth Jitter Lost/Total > Datagrams > [ 4] 0.00-10.01 sec 1.24 MBytes 1.04 Mbits/sec 0.325 ms 0/159 (0%) > [ 4] Sent 159 datagrams > > Any advice how to solve it ? > > Thank you. > _______________________________________________ > > > > > 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 . > > > > Thank you very much . > > Mehmet Erol Sanliturk > > > > _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
