TechOverflow tested Wireguard bandwidth / throughput on the TPLink WDR3600 with OpenWRT 21.02, based on a standard iperf3 TCP benchmark. We did not use Pre-shared keys in this setup.
So far we were able to verify that the Wireguard bandwidth is approximately 27Mbit/s (unidirectional), measured using iperf3.
Connecting to host 192.168.239.254, port 5201 [ 5] local 10.9.1.104 port 57502 connected to 192.168.239.254 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 3.48 MBytes 29.2 Mbits/sec 0 215 KBytes [ 5] 1.00-2.00 sec 3.86 MBytes 32.4 Mbits/sec 0 387 KBytes [ 5] 2.00-3.00 sec 3.13 MBytes 26.2 Mbits/sec 0 470 KBytes [ 5] 3.00-4.00 sec 3.37 MBytes 28.3 Mbits/sec 0 470 KBytes [ 5] 4.00-5.00 sec 3.31 MBytes 27.8 Mbits/sec 0 470 KBytes [ 5] 5.00-6.00 sec 3.31 MBytes 27.8 Mbits/sec 0 470 KBytes [ 5] 6.00-7.00 sec 3.31 MBytes 27.8 Mbits/sec 0 470 KBytes [ 5] 7.00-8.00 sec 2.76 MBytes 23.1 Mbits/sec 0 470 KBytes [ 5] 8.00-9.00 sec 3.31 MBytes 27.8 Mbits/sec 0 470 KBytes [ 5] 9.00-10.00 sec 2.76 MBytes 23.1 Mbits/sec 0 470 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 32.6 MBytes 27.4 Mbits/sec 0 sender [ 5] 0.00-10.14 sec 32.0 MBytes 26.4 Mbits/sec receiver
During the test, top consistently showed 0% idle CPU load, with the load being approximately 51% sys and 49% sirq.
The commands in use were
iperf3 -s
on the WDR3600 and
iperf -c [IP address of WDR3600]
on the client.