iperf is a strain test for networks/memory/disk, but is commonly used to find network problems. You have to install iperf as a server on some box on one end of the network, then use the iperf client on your laptop somewhere else on the network to run the throughput test. On Debian SERVER do:
cd /usr/srcapt-get install build-essential gitgit clone https://github.com/esnet/iperf.gitcd iperf./configuremakemake installiperf3 -s------------------------------------------------------------Server listening on TCP port 5001TCP window size: 85.3 KByte (default)------------------------------------------------------------if you get an error:iperf3: error while loading shared libraries: libiperf.so.0: cannot open shared object file: No such file or directoryyou have to point to the right file:cd /find ./ | grep libiperf.so.0 ./usr/src/iperf/iperf/src/.libs/libiperf.so.0.0.0 ./usr/src/iperf/iperf/src/.libs/libiperf.so.0 ./usr/local/lib/libiperf.so.0.0.0 ./usr/local/lib/libiperf.so.0echo $LD_LIBRARY_PATH if you get a blank, the path does not work, so do:LD_LIBRARY_PATH=/usr/local/libLD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib/libiperf.so.0export LD_LIBRARY_PATHiperf3 -s-----------------------------------------------------------Server listening on 5201-----------------------------------------------------------
If you want these to persist across reboot edit /root/.bashrc (or wherever you want to load your variables from for this user) and add these lines to the end of the file:
vi /root/.bashrc LD_LIBRARY_PATH=/usr/local/lib LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib/libiperf.so.0 export LD_LIBRARY_PATH
Now go to you LAPTOP somewhere else on the network and do:
iperf3 -c iperf.serv.er.ip -i 1 -t 10 Connecting to host iperf.serv.er.ip, port 5201 [ 4] local you.r.i.p port 61110 connected to iperf.serv.er.ip port 5201 [ ID] Interval Transfer Bandwidth [ 4] 0.00-1.00 sec 5.64 MBytes 47.3 Mbits/sec [ 4] 1.00-2.00 sec 6.45 MBytes 54.1 Mbits/sec [ 4] 2.00-3.00 sec 4.79 MBytes 40.2 Mbits/sec [ 4] 3.00-4.00 sec 5.40 MBytes 45.3 Mbits/sec [ 4] 4.00-5.00 sec 2.31 MBytes 19.4 Mbits/sec [ 4] 5.00-6.00 sec 3.89 MBytes 32.7 Mbits/sec [ 4] 6.00-7.00 sec 5.11 MBytes 42.8 Mbits/sec [ 4] 7.00-8.00 sec 4.22 MBytes 35.4 Mbits/sec [ 4] 8.00-9.00 sec 4.90 MBytes 41.2 Mbits/sec [ 4] 9.00-10.00 sec 4.11 MBytes 34.4 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth [ 4] 0.00-10.00 sec 46.8 MBytes 39.3 Mbits/sec sender [ 4] 0.00-10.00 sec 46.8 MBytes 39.3 Mbits/sec receiver iperf Done.
