Time flies and I can hardly believe that I’ve had a fiber connection at my Paris flat for 4 years now and that fiber is still almost nowhere to be seen in Germany. O.k. I do have vectored VDSL and 100 Mbit/s down, 40 Mbit/s up is not so bad. But fiber is playing in an entirely different league. When I got my fiber Line in Paris four years ago, I measured 264 Mbit/s in the downlink direction and 48 Mbit/s in the uplink direction. So how are things today, i.e. 4 years down the road?
This time around I’ve used iperf3 in TCP mode to run the speed tests as shown below and to my great satisfaction, speeds are still the same as four years ago. iperf3 measured 287 Mbit/s in the downlink direction and 51 Mbit/s in the uplink direction even during busy hours in the evening. In other words, the overprovisioning in the network is still sufficient that data transfers of other uses that use the same beam of light have no impact on my instantaneous and sustained throughput. Very nice indeed!
And here are the detailed results in case you are interested. You might notice that while in the downlink direction, the achieved throughput is the same in every second, uplink throughput varies a bit. I’m not sure what the reason for that is, it could be many things.
martin@vm-host:~$ iperf3 -c ping-ams1.online.net -R -p 5206 Connecting to host ping-ams1.online.net, port 5206 Reverse mode, remote host ping-ams1.online.net is sending [ 4] local 192.168.1.74 port 56132 connected to 163.172.208.7 port 5206 [ ID] Interval Transfer Bandwidth [ 4] 0.00-1.00 sec 33.1 MBytes 278 Mbits/sec [ 4] 1.00-2.00 sec 34.0 MBytes 285 Mbits/sec [ 4] 2.00-3.00 sec 34.0 MBytes 285 Mbits/sec [ 4] 3.00-4.00 sec 34.0 MBytes 285 Mbits/sec [ 4] 4.00-5.00 sec 34.0 MBytes 285 Mbits/sec [ 4] 5.00-6.00 sec 34.0 MBytes 285 Mbits/sec [ 4] 6.00-7.00 sec 34.0 MBytes 285 Mbits/sec [ 4] 7.00-8.00 sec 34.0 MBytes 285 Mbits/sec [ 4] 8.00-9.00 sec 34.0 MBytes 285 Mbits/sec [ 4] 9.00-10.00 sec 34.0 MBytes 285 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 352 MBytes 295 Mbits/sec 1 sender [ 4] 0.00-10.00 sec 342 MBytes 287 Mbits/sec receiver martin@vm-host:~$ iperf3 -c ping-ams1.online.net -p 5206 Connecting to host ping-ams1.online.net, port 5206 [ 4] local 192.168.1.74 port 56140 connected to 163.172.208.7 port 5206 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 9.36 MBytes 78.5 Mbits/sec 5 253 KBytes [ 4] 1.00-2.00 sec 8.51 MBytes 71.4 Mbits/sec 178 58.0 KBytes [ 4] 2.00-3.00 sec 5.53 MBytes 46.4 Mbits/sec 2 56.6 KBytes [ 4] 3.00-4.00 sec 4.54 MBytes 38.1 Mbits/sec 2 60.8 KBytes [ 4] 4.00-5.00 sec 5.78 MBytes 48.5 Mbits/sec 1 87.7 KBytes [ 4] 5.00-6.00 sec 7.15 MBytes 59.9 Mbits/sec 47 73.5 KBytes [ 4] 6.00-7.00 sec 5.03 MBytes 42.2 Mbits/sec 13 55.1 KBytes [ 4] 7.00-8.00 sec 4.35 MBytes 36.5 Mbits/sec 2 63.6 KBytes [ 4] 8.00-9.00 sec 6.71 MBytes 56.3 Mbits/sec 0 119 KBytes [ 4] 9.00-10.00 sec 6.21 MBytes 52.1 Mbits/sec 75 32.5 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 63.2 MBytes 53.0 Mbits/sec 325 sender [ 4] 0.00-10.00 sec 61.6 MBytes 51.7 Mbits/sec receiver