RT-AX56U iperf3 wifi speed 350Mbps from client to server and 900Mbps from server to client

[KoKa]

RT-AX56U
When testing wifi with iperf I have only ~350-400Mbps, when using reverse option I get ~900Mbps

I tried 2 latest official firmware 3.0.0.4.386_51679, 3.0.0.4.386.51665 and two merlin 3004.388.8_2, 3004.388.6_2. After each update I reset to factory then set up 5GHz network trough quick setup (just password and ssid) and tested that way, so settings were mostly automatic.
On both 3004.388.8_2, 3004.388.6_2 I tried all different settings in wifi section. For now I have set AX only 80 Mhz.
I tried disabling universal and AX beamforming, disabling OFDMA, to no difference (I'm actually surprised that disabling OFDMA still yields 800Mbps when reversed testing)
I have also tested in AC mode and speeds were as much asymmetric as in AX mode.

When I first bought the router I think I was getting 600-700 when iperf testing without reverse but it was long time ago. So I'm not sure if my router has somehow broken or it was like that from factory. I wish someone who also owns this router could test that.

(Testing with -P 2 or higher does not improve much, and -P 1 results were more compact to fit here)

Tests are made from wifi client to wired server:

client -> server​ PS T:\_Downloads\iperf3.17.1_64> .\iperf3.exe -c 192.168.1.120 -B 192.168.1.157 Connecting to host 192.168.1.120, port 5201 [ 5] local 192.168.1.157 port 65215 connected to 192.168.1.120 port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.01 sec 21.1 MBytes 176 Mbits/sec [ 5] 1.01-2.01 sec 39.2 MBytes 329 Mbits/sec [ 5] 2.01-3.01 sec 43.9 MBytes 369 Mbits/sec [ 5] 3.01-4.01 sec 42.9 MBytes 360 Mbits/sec [ 5] 4.01-5.00 sec 44.2 MBytes 372 Mbits/sec [ 5] 5.00-6.00 sec 44.0 MBytes 370 Mbits/sec [ 5] 6.00-7.01 sec 44.6 MBytes 374 Mbits/sec [ 5] 7.01-8.01 sec 43.6 MBytes 366 Mbits/sec [ 5] 8.01-9.01 sec 42.5 MBytes 356 Mbits/sec [ 5] 9.01-10.01 sec 42.8 MBytes 358 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.01 sec 409 MBytes 343 Mbits/sec sender [ 5] 0.00-10.06 sec 405 MBytes 338 Mbits/sec receiver

server -> client​ PS T:\_Downloads\iperf3.17.1_64> .\iperf3.exe -c 192.168.1.120 -B 192.168.1.157 -R Connecting to host 192.168.1.120, port 5201 Reverse mode, remote host 192.168.1.120 is sending [ 5] local 192.168.1.157 port 65186 connected to 192.168.1.120 port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.01 sec 95.5 MBytes 797 Mbits/sec [ 5] 1.01-2.01 sec 110 MBytes 922 Mbits/sec [ 5] 2.01-3.00 sec 107 MBytes 908 Mbits/sec [ 5] 3.00-4.01 sec 111 MBytes 926 Mbits/sec [ 5] 4.01-5.01 sec 110 MBytes 920 Mbits/sec [ 5] 5.01-6.00 sec 108 MBytes 913 Mbits/sec [ 5] 6.00-7.01 sec 111 MBytes 921 Mbits/sec [ 5] 7.01-8.01 sec 109 MBytes 916 Mbits/sec [ 5] 8.01-9.01 sec 108 MBytes 916 Mbits/sec [ 5] 9.01-10.01 sec 113 MBytes 941 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.02 sec 1.06 GBytes 910 Mbits/sec 0 sender [ 5] 0.00-10.01 sec 1.06 GBytes 908 Mbits/sec receiver

client -> server (wired)​ PS T:\_Downloads\iperf3.17.1_64> .\iperf3.exe -c 192.168.1.120 -B 192.168.1.130 Connecting to host 192.168.1.120, port 5201 [ 5] local 192.168.1.130 port 49349 connected to 192.168.1.120 port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 115 MBytes 960 Mbits/sec [ 5] 1.00-2.00 sec 111 MBytes 936 Mbits/sec [ 5] 2.00-3.00 sec 114 MBytes 950 Mbits/sec [ 5] 3.00-4.01 sec 114 MBytes 949 Mbits/sec [ 5] 4.01-5.00 sec 113 MBytes 948 Mbits/sec [ 5] 5.00-6.01 sec 114 MBytes 950 Mbits/sec [ 5] 6.01-7.00 sec 113 MBytes 949 Mbits/sec [ 5] 7.00-8.00 sec 113 MBytes 949 Mbits/sec [ 5] 8.00-9.01 sec 114 MBytes 948 Mbits/sec [ 5] 9.01-10.00 sec 112 MBytes 950 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.00 sec 1.10 GBytes 949 Mbits/sec sender [ 5] 0.00-10.06 sec 1.10 GBytes 943 Mbits/sec receiver

I tried another wifi client (quest2):

client -> server​ T:\_Downloads>adb shell /data/local/tmp/iperf3.17.1 -c 192.168.1.120 Connecting to host 192.168.1.120, port 5201 [ 5] local 192.168.1.192 port 39614 connected to 192.168.1.120 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 30.1 MBytes 252 Mbits/sec 22 156 KBytes [ 5] 1.00-2.00 sec 33.6 MBytes 282 Mbits/sec 7 229 KBytes [ 5] 2.00-3.00 sec 34.2 MBytes 287 Mbits/sec 5 170 KBytes [ 5] 3.00-4.00 sec 35.9 MBytes 301 Mbits/sec 9 173 KBytes [ 5] 4.00-5.00 sec 35.2 MBytes 296 Mbits/sec 24 188 KBytes [ 5] 5.00-6.00 sec 33.4 MBytes 280 Mbits/sec 14 191 KBytes [ 5] 6.00-7.00 sec 31.9 MBytes 267 Mbits/sec 19 150 KBytes [ 5] 7.00-8.00 sec 29.9 MBytes 251 Mbits/sec 4 181 KBytes [ 5] 8.00-9.00 sec 29.8 MBytes 250 Mbits/sec 7 191 KBytes [ 5] 9.00-10.00 sec 29.4 MBytes 246 Mbits/sec 7 151 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 323 MBytes 271 Mbits/sec 118 sender [ 5] 0.00-10.03 sec 323 MBytes 270 Mbits/sec receiver

server -> client​ T:\_Downloads>adb shell /data/local/tmp/iperf3.17.1 -c 192.168.1.120 -P 1 -R Connecting to host 192.168.1.120, port 5201 Reverse mode, remote host 192.168.1.120 is sending [ 5] local 192.168.1.192 port 39898 connected to 192.168.1.120 port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 77.6 MBytes 650 Mbits/sec [ 5] 1.00-2.00 sec 80.9 MBytes 679 Mbits/sec [ 5] 2.00-3.00 sec 75.6 MBytes 634 Mbits/sec [ 5] 3.00-4.00 sec 78.2 MBytes 656 Mbits/sec [ 5] 4.00-5.00 sec 79.8 MBytes 669 Mbits/sec [ 5] 5.00-6.00 sec 76.1 MBytes 639 Mbits/sec [ 5] 6.00-7.00 sec 75.9 MBytes 636 Mbits/sec [ 5] 7.00-8.00 sec 75.4 MBytes 632 Mbits/sec [ 5] 8.00-9.00 sec 74.8 MBytes 627 Mbits/sec [ 5] 9.00-10.00 sec 79.9 MBytes 670 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.03 sec 778 MBytes 650 Mbits/sec 0 sender [ 5] 0.00-10.00 sec 774 MBytes 649 Mbits/sec receiver

Other router test (Cudy WR3000):

client -> server​ PS T:\_Downloads\iperf3.17.1_64> .\iperf3.exe -c 192.168.8.105 -B 192.168.8.206 Connecting to host 192.168.8.105, port 5201 [ 5] local 192.168.8.206 port 57756 connected to 192.168.8.105 port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 101 MBytes 845 Mbits/sec [ 5] 1.00-2.00 sec 106 MBytes 891 Mbits/sec [ 5] 2.00-3.01 sec 105 MBytes 871 Mbits/sec [ 5] 3.01-4.01 sec 105 MBytes 880 Mbits/sec [ 5] 4.01-5.02 sec 106 MBytes 888 Mbits/sec [ 5] 5.02-6.00 sec 107 MBytes 907 Mbits/sec [ 5] 6.00-7.00 sec 104 MBytes 877 Mbits/sec [ 5] 7.00-8.01 sec 105 MBytes 872 Mbits/sec [ 5] 8.01-9.01 sec 104 MBytes 867 Mbits/sec [ 5] 9.01-10.01 sec 106 MBytes 886 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.01 sec 1.02 GBytes 878 Mbits/sec sender [ 5] 0.00-10.06 sec 1.02 GBytes 874 Mbits/sec receiver

server -> client​ PS T:\_Downloads\iperf3.17.1_64> .\iperf3.exe -c 192.168.8.105 -B 192.168.8.206 -R Connecting to host 192.168.8.105, port 5201 Reverse mode, remote host 192.168.8.105 is sending [ 5] local 192.168.8.206 port 57721 connected to 192.168.8.105 port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 110 MBytes 924 Mbits/sec [ 5] 1.00-2.00 sec 112 MBytes 938 Mbits/sec [ 5] 2.00-3.01 sec 114 MBytes 942 Mbits/sec [ 5] 3.01-4.01 sec 111 MBytes 936 Mbits/sec [ 5] 4.01-5.01 sec 111 MBytes 931 Mbits/sec [ 5] 5.01-6.01 sec 111 MBytes 936 Mbits/sec [ 5] 6.01-7.01 sec 113 MBytes 943 Mbits/sec [ 5] 7.01-8.01 sec 112 MBytes 936 Mbits/sec [ 5] 8.01-9.01 sec 111 MBytes 934 Mbits/sec [ 5] 9.01-10.01 sec 112 MBytes 940 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.06 sec 1.09 GBytes 934 Mbits/sec 0 sender [ 5] 0.00-10.01 sec 1.09 GBytes 936 Mbits/sec receiver

 

[u.pushken]

seriously?

 

[Tech9]

seriously?

Environment noise (-88dBm, good) is different than signal level (-41dBm, excellent). You mixed the two.

 

[Ripshod]

seriously?

View attachment 61659

Don't confuse signal level (in this case -41dBm) with background noise (88dBm). Lower noise is better. Even by your chart the signal level is at least "excellent".

 

[u.pushken]

You mixed the two.

ok, sorry

 

[u.pushken]

I saw, sorry