Disappointing Wi-Fi (bitrate) performance [AVM FRITZ!Box 7530]

Installing and Using OpenWrt
1

Hi everyone,

I wonder if anyone can help me getting started with debugging poor wireless performance on my 22.03 install on a AVM FRITZ!Box 7530.

Wireless config:

/etc/config/wireless

config wifi-device 'radio0'
	option type 'mac80211'
	option path 'platform/soc/a000000.wifi'
	option band '2g'
	option cell_density '0'
	option country 'GB'
	option channel 'auto'

config wifi-device 'radio1'
	option type 'mac80211'
	option path 'platform/soc/a800000.wifi'
	option band '5g'
	option cell_density '0'
	option country 'GB'
	option htmode 'VHT80'
	option channel 'auto'

config wifi-iface 'internal5g'
	option device 'radio1'
	option mode 'ap'
	option network 'internal'
	option key '*'
	option wmm '0'
	option ssid '*'
	option encryption 'sae'

config wifi-iface 'internal2g'
	option device 'radio0'
	option mode 'ap'
	option ssid '*'
	option key '*'
	option network 'internal'
	option encryption 'sae-mixed'

Lan performance test:

# speedtest-netperf.sh
2022-09-11 18:25:23 Starting speedtest for 60 seconds per transfer session.
Measure speed to netperf.bufferbloat.net (IPv4) while pinging gstatic.com.
Download and upload sessions are sequential, each with 5 simultaneous streams.
.............................................................
 Download:  78.71 Mbps
  Latency: [in msec, 61 pings, 0.00% packet loss]
      Min:   2.698
    10pct:   2.984
   Median:   6.536
      Avg:  13.605
    90pct:  23.816
      Max: 232.565
 CPU Load: [in % busy (avg +/- std dev) @ avg frequency, 55 samples]
     cpu0:  37.4 +/-  8.3  @  602 MHz
     cpu1:  16.3 +/-  9.1  @  627 MHz
     cpu2:  16.3 +/-  9.4  @  600 MHz
     cpu3:  13.1 +/- 11.0  @  606 MHz
 Overhead: [in % used of total CPU available]
  netperf:  15.1
.............................................................
   Upload:  64.32 Mbps
  Latency: [in msec, 62 pings, 0.00% packet loss]
      Min:   2.729
    10pct:   3.069
   Median:   6.377
      Avg:  10.690
    90pct:  17.695
      Max:  78.762
 CPU Load: [in % busy (avg +/- std dev) @ avg frequency, 56 samples]
     cpu0:  27.1 +/-  8.0  @  551 MHz
     cpu1:   3.8 +/-  3.3  @  582 MHz
     cpu2:   2.9 +/-  4.0  @  550 MHz
     cpu3:   3.4 +/-  4.1  @  580 MHz
 Overhead: [in % used of total CPU available]
  netperf:   2.9

Connecting to an MBP from about 2m, I get the following from an Ookla speedtest:

❯ speedtest

   Speedtest by Ookla

      Server: **
         ISP: **
Idle Latency:    11.14 ms   (jitter: 5.69ms, low: 6.86ms, high: 15.75ms)
    Download:    20.84 Mbps (data used: 22.7 MB)
                332.85 ms   (jitter: 78.47ms, low: 20.74ms, high: 778.58ms)
      Upload:    18.68 Mbps (data used: 33.6 MB)
                488.45 ms   (jitter: 60.92ms, low: 31.35ms, high: 948.17ms)
 Packet Loss: Not available.

Wondering where I could get started to see why I'm not getting anything close to the LAN speed...?

Hope someone can help

Thanks

2

According to the documentation, WMM is mandatory for of 802.11n/ac. Have you tried with option wmm '1' (or without the option as that is the default anyway)?

3

@janh thanks very much for your response! I'm happy to respond that I tried enabling WMM, and... I seem to now be getting great speeds.

Thanks very much for your input!

4

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