AR-750S Maximum Speed 20Mbps?

Hmm, so you’re not really measuring link throughput, but file-transfer rate to some drive?

You’re then likely limited by CPU, especially if you’re using Samba or some other “heavy” protocol. You’ve got crypto and USB involved, both of which can be CPU intensive.

Let me clarify - my concern is that internet speeds are maxing out at 20 Mbps on wireless 5G band. What I’m demonstrating here is that the limitation is the wireless as it’s giving higher throughput over the LAN.

Are you using to test speed?

Can you disable IPV6 and try again? OpenWrt Forum Archive

At last, what is your firmware version? Can you upgrade to latest 3.026 without reserving settings and try again? Download the tar file here and upload to the router’s UI->upgrade . GL.iNet download center

Yes for a internet speed test and LAN Speed Test software to test network file speeds over wireless.

I disabled IPV6 and the results are marginally faster but broadly in line with before: 24 Mbps
LAN Speed Test: 34 Mbps

I’m on 3.026 already. I think I preserved settings when I upgraded, should I try a factory reset?

Yes. pls do a factory reset from the UI and disable IPv6 again.

It’s something about your environment or config.

From my AR750S just now, link is over 802.11s with batman-adv routing to an active Linksys EA8300 (IPQ4019/QCA9888, QCA9888 for this link) in a routing situation, client over wired, then routed over 802.11s to server. ath10k (non-CT) drivers and firmware, as the -CT drivers don’t support 802.11s for the Wave 1 chip sets, from what I understand.

Connecting to host, port 5201
[  5] local port 32964 connected to port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  12.1 MBytes   101 Mbits/sec   33    337 KBytes       
[  5]   1.00-2.00   sec  10.7 MBytes  89.7 Mbits/sec    0    393 KBytes       
[  5]   2.00-3.00   sec  11.6 MBytes  97.5 Mbits/sec    0    434 KBytes       
[  5]   3.00-4.00   sec  10.8 MBytes  90.2 Mbits/sec   25    331 KBytes       
[  5]   4.00-5.00   sec  11.7 MBytes  98.5 Mbits/sec    0    356 KBytes       
[  5]   5.00-6.00   sec  9.82 MBytes  82.4 Mbits/sec    0    370 KBytes       
[  5]   6.00-7.00   sec  10.8 MBytes  90.2 Mbits/sec    0    392 KBytes       
[  5]   7.00-8.00   sec  11.6 MBytes  97.0 Mbits/sec    0    414 KBytes       
[  5]   8.00-9.00   sec  10.7 MBytes  89.7 Mbits/sec    0    434 KBytes       
[  5]   9.00-10.00  sec  11.6 MBytes  97.5 Mbits/sec    2    327 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   111 MBytes  93.4 Mbits/sec   60             sender
[  5]   0.00-10.04  sec   109 MBytes  91.2 Mbits/sec                  receiver
  CPU[|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||100.0%]   Tasks: 17, 0 thr; 1 running
  Mem[|||||||||||||||||||||||||||                                      22.8M/120M]   Load average: 0.12 0.08 0.07 
  Swp[                                                                      0K/0K]   Uptime: 00:16:41

I’ve done that but it didn’t help. However, I did do another test. I connected to a mobile hotspot on my mobile phone and got 45 Mbps so it seems to be either the LAN interface on the AR-750S or something else on my LAN. I’ve checked my router and there’s no QOS or anything else that might be limiting so it must be the LAN interface on the 750S.

Is there anything else I can try?

Install htop or, if already there, top, and check that you aren’t CPU-bound. Don’t open LuCI while trying to push the router hard as single-core, MIPS-based SoCs, in general, don’t have a lot of CPU power and LuCI can consume quite a bit alone.

Is your client single-stream, or does it support multiple streams? Checking

iw dev <wlan device> station dump

should show the modulation type of the connection in use.

Thanks jeffsf. I installed htop and it’s clear that I’m not CPU-bound.

Here’s the output of iw dev:

inactive time:  0 ms
rx bytes:       101247804
rx packets:     151968
tx bytes:       179021139
tx packets:     199179
tx retries:     0
tx failed:      10
rx drop misc:   53
signal:         -55 [-55, -73] dBm
signal avg:     -54 [-54, -73] dBm
tx bitrate:     6.0 MBit/s
rx bitrate:     390.0 MBit/s VHT-MCS 8 80MHz short GI VHT-NSS 1
rx duration:    10811168 us
authorized:     yes
authenticated:  yes
associated:     yes
preamble:       long
WMM/WME:        yes
MFP:            no
TDLS peer:      no
DTIM period:    2
beacon interval:100
short slot time:yes
connected time: 3737 seconds

What is the speed of if you use cable and test directly on LAN?

If it is slow then it may not be WiFi problem. It may be problems of the cable plugged to the WAN.

I need to find a computer with a standard Ethernet port. Will try tomorrow and report back.

This suggests that the client is connecting with a high-bandwidth modulation, so there is still a puzzle.