iperf3
Iperf3 adalah salah satu alat uji kinerja jaringan (network performance testing tool) yang banyak digunakan oleh administrator sistem dan jaringan untuk mengukur throughput, bandwidth, latency, dan stabilitas koneksi antara dua host. Panduan ini membahas secara detail cara install dan menggunakan Iperf3 di Linux, termasuk konfigurasi server-client, dan pengujian TCP/UDP.
Persiapan
Berikut adalah skenario pengujian:
[Server] ←→ [Router/Switch] ←→ [Client]
192.168.167.89 192.168.167.67
Jalankan perintah berikut untuk masing-masing distribusi Linux apabila iperf3 belum terinstall:
# AlmaLinux
dnf install iperf3 -y
# Ubuntu/Debian
apt-get install iperf3 -y
Upload Test (Client → Server)
Mengukur kecepatan upload dari client ke server.
Jalankan perintah berikut pada iperf server:
iperf3 -s -p 5201
Contoh outputnya adalah:
Server listening on 5201
Lalu jalankan perintah berikut pada iperf client:
iperf3 -c 192.168.167.89 -p 5201 -t 30 -i 5
Contoh output:
Connecting to host 192.168.167.89, port 5201
[ 5] local 192.168.167.67 port 35532 connected to 192.168.167.89 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-5.00 sec 10.3 GBytes 17.7 Gbits/sec 0 3.10 MBytes
[ 5] 5.00-10.00 sec 10.8 GBytes 18.5 Gbits/sec 0 3.10 MBytes
[ 5] 10.00-15.00 sec 10.7 GBytes 18.4 Gbits/sec 0 3.10 MBytes
[ 5] 15.00-20.00 sec 10.2 GBytes 17.5 Gbits/sec 0 3.10 MBytes
[ 5] 20.00-25.00 sec 10.9 GBytes 18.7 Gbits/sec 0 3.10 MBytes
[ 5] 25.00-30.00 sec 10.4 GBytes 17.9 Gbits/sec 0 3.10 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-30.00 sec 63.3 GBytes 18.1 Gbits/sec 0 sender
[ 5] 0.00-30.04 sec 63.3 GBytes 18.1 Gbits/sec receiver
iperf Done.
Penjelasan perintah iperf3 diatas adalah sebagai berikut:
-c: connect ke server-p: port number-t: durasi test (30 detik)-i: interval report (5 detik)
Download Test (Server → Client)
Mengukur kecepatan download dari server ke client. Pada test kali ini klien akan mendownload data dari server, dan server akan mengupload. Reverse mode (server sends, client receives).
Jalankan perintah berikut pada iperf server:
iperf3 -s -p 5201
Lalu, jalankan perintah berikut dengan menambahkan parameter -R (reverse test, client receives data) pada iperf client:
iperf3 -c 192.168.167.89 -p 5201 -t 30 -i 5 -R
Contoh output:
Reverse mode, remote host 192.168.167.89 is sending
[ 5] local 192.168.167.67 port 42108 connected to 192.168.167.89 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-5.00 sec 10.4 GBytes 17.9 Gbits/sec
[ 5] 5.00-10.00 sec 11.1 GBytes 19.0 Gbits/sec
[ 5] 10.00-15.00 sec 11.0 GBytes 18.8 Gbits/sec
[ 5] 15.00-20.00 sec 10.9 GBytes 18.7 Gbits/sec
[ 5] 20.00-25.00 sec 10.9 GBytes 18.7 Gbits/sec
[ 5] 25.00-30.00 sec 11.0 GBytes 18.9 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-30.04 sec 65.2 GBytes 18.7 Gbits/sec 1 sender
[ 5] 0.00-30.00 sec 65.2 GBytes 18.7 Gbits/sec receiver
iperf Done.
Parallel Test
Test dengan beberapa koneksi parallel.
Jalankan perintah berikut pada iperf server:
iperf3 -s -p 5201
Lalu jalankan perintah berikut untuk menguji 4 paralel test pada client:
iperf3 -c 192.168.167.89 -p 5201 -t 30 -i 5 -P 4
UDP Test
Jalankan perintah berikut pada iperf server:
iperf3 -s -p 5201
Jalankan perintah berikut pada sisi iperf client:
iperf3 -c 192.168.167.89 -p 5201 -u -b 100M -t 10
Berikut contoh outputnya:
Connecting to host 192.168.167.89, port 5201
[ 5] local 192.168.167.67 port 37263 connected to 192.168.167.89 port 5201
[ ID] Interval Transfer Bitrate Total Datagrams
[ 5] 0.00-1.00 sec 11.9 MBytes 99.9 Mbits/sec 8626
[ 5] 1.00-2.00 sec 11.9 MBytes 100 Mbits/sec 8633
[ 5] 2.00-3.00 sec 11.9 MBytes 100 Mbits/sec 8632
[ 5] 3.00-4.00 sec 11.9 MBytes 100 Mbits/sec 8633
[ 5] 4.00-5.00 sec 11.9 MBytes 100 Mbits/sec 8632
[ 5] 5.00-6.00 sec 11.9 MBytes 100 Mbits/sec 8633
[ 5] 6.00-7.00 sec 11.9 MBytes 100 Mbits/sec 8633
[ 5] 7.00-8.00 sec 11.9 MBytes 100 Mbits/sec 8632
[ 5] 8.00-9.00 sec 11.9 MBytes 100 Mbits/sec 8633
[ 5] 9.00-10.00 sec 11.9 MBytes 100 Mbits/sec 8632
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-10.00 sec 119 MBytes 100 Mbits/sec 0.000 ms 0/86319 (0%) sender
[ 5] 0.00-10.04 sec 119 MBytes 99.6 Mbits/sec 0.010 ms 0/86319 (0%) receiver
iperf Done.
Penjelasan perintah iperf diatas:
-u: UDP mode-b: bandwidth target