Vero4k Wireless Bandwidth Performance

nerdwork · 19 October 2019 00:18

I’m having some issues with wireless throughput on my Vero4K. It’s connected to AC on a Netgear D7000 (access point mode), separate 5GHz AC network. The Vero4K is located in the same room as the D7000.

As you can see from the below iperf tests the peak bandwidth is okay at around 180Mbit/sec, but there are consistent and repeatable drops to 40-60Mbit/sec.

I’ve tested this from Vero4K to both a QNAP and MacMini (both GigE to the D7000).

Vero4K —> 5GHz AC —> D7000 <— USG

QNAP GigE to D7000 / MacMini GigE to D7000

Vero4K iperf3 client > QNAP iperf3 server

osmc@osmc:~$ iperf3 -c 192.168.1.50 -t 30
Connecting to host 192.168.1.50, port 5201
[  4] local 192.168.1.10 port 36789 connected to 192.168.1.50 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  21.6 MBytes   181 Mbits/sec    0    403 KBytes       
[  4]   1.00-2.00   sec  7.60 MBytes  63.8 Mbits/sec    0    430 KBytes       
[  4]   2.00-3.02   sec  5.98 MBytes  49.2 Mbits/sec    0    430 KBytes       
[  4]   3.02-4.00   sec  3.85 MBytes  32.9 Mbits/sec    0    430 KBytes       
[  4]   4.00-5.00   sec  5.94 MBytes  49.8 Mbits/sec    0    448 KBytes       
[  4]   5.00-6.00   sec  20.2 MBytes   169 Mbits/sec    0    543 KBytes       
[  4]   6.00-7.00   sec  21.2 MBytes   178 Mbits/sec    0    595 KBytes       
[  4]   7.00-8.00   sec  21.6 MBytes   181 Mbits/sec    0    645 KBytes       
[  4]   8.00-9.00   sec  18.2 MBytes   153 Mbits/sec    0    693 KBytes       
[  4]   9.00-10.00  sec  19.9 MBytes   167 Mbits/sec    0    730 KBytes       
[  4]  10.00-11.00  sec  7.83 MBytes  65.7 Mbits/sec    0    738 KBytes       
[  4]  11.00-12.00  sec  4.88 MBytes  40.9 Mbits/sec    0    738 KBytes       
[  4]  12.00-13.00  sec  4.49 MBytes  37.7 Mbits/sec    0    738 KBytes       
[  4]  13.00-14.00  sec  4.83 MBytes  40.4 Mbits/sec    0    738 KBytes       
[  4]  14.00-15.00  sec  18.4 MBytes   155 Mbits/sec    0    796 KBytes       
[  4]  15.00-16.00  sec  21.9 MBytes   184 Mbits/sec    0    904 KBytes       
[  4]  16.00-17.00  sec  21.2 MBytes   178 Mbits/sec    0    970 KBytes       
[  4]  17.00-18.01  sec  22.5 MBytes   187 Mbits/sec    0   1.02 MBytes       
[  4]  18.01-19.00  sec  11.4 MBytes  96.2 Mbits/sec    0   1.06 MBytes       
[  4]  19.00-20.00  sec  6.96 MBytes  58.4 Mbits/sec    0   1.06 MBytes       
[  4]  20.00-21.00  sec  5.81 MBytes  48.8 Mbits/sec    0   1.06 MBytes       
[  4]  21.00-22.00  sec  4.52 MBytes  37.9 Mbits/sec    0   1.07 MBytes       
[  4]  22.00-23.02  sec  13.9 MBytes   114 Mbits/sec    0   1.13 MBytes       
[  4]  23.02-24.00  sec  20.7 MBytes   178 Mbits/sec    0   1.18 MBytes       
[  4]  24.00-25.00  sec  21.6 MBytes   181 Mbits/sec    0   1.22 MBytes       
[  4]  25.00-26.00  sec  21.7 MBytes   183 Mbits/sec    0   1.25 MBytes       
[  4]  26.00-27.00  sec  19.2 MBytes   161 Mbits/sec    0   1.29 MBytes       
[  4]  27.00-28.00  sec  6.16 MBytes  51.8 Mbits/sec    0   1.31 MBytes       
[  4]  28.00-29.00  sec  5.06 MBytes  42.4 Mbits/sec    0   1.31 MBytes       
[  4]  29.00-30.00  sec  5.18 MBytes  43.4 Mbits/sec    0   1.31 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-30.00  sec   394 MBytes   110 Mbits/sec    0             sender
[  4]   0.00-30.00  sec   392 MBytes   110 Mbits/sec                  receiver

Vero4K iperf3 client > MacMini iperf3 server

osmc@osmc:~$ iperf3 -c 192.168.1.150 -t 30
Connecting to host 192.168.1.150, port 5201
[  4] local 192.168.1.10 port 42663 connected to 192.168.1.150 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  12.5 MBytes   105 Mbits/sec    0    334 KBytes       
[  4]   1.00-2.00   sec  21.5 MBytes   180 Mbits/sec    0    420 KBytes       
[  4]   2.00-3.00   sec  22.1 MBytes   186 Mbits/sec    0    523 KBytes       
[  4]   3.00-4.01   sec  21.2 MBytes   177 Mbits/sec    0    577 KBytes       
[  4]   4.01-5.00   sec  18.2 MBytes   154 Mbits/sec    0    626 KBytes       
[  4]   5.00-6.00   sec  6.16 MBytes  51.7 Mbits/sec    0    626 KBytes       
[  4]   6.00-7.00   sec  6.91 MBytes  57.9 Mbits/sec    0    648 KBytes       
[  4]   7.00-8.00   sec  4.70 MBytes  39.4 Mbits/sec    0    655 KBytes       
[  4]   8.00-9.01   sec  6.40 MBytes  53.0 Mbits/sec    0    663 KBytes       
[  4]   9.01-10.00  sec  24.3 MBytes   206 Mbits/sec    0    720 KBytes       
[  4]  10.00-11.00  sec  25.1 MBytes   211 Mbits/sec    0    803 KBytes       
[  4]  11.00-12.00  sec  24.9 MBytes   209 Mbits/sec    0    921 KBytes       
[  4]  12.00-13.00  sec  24.5 MBytes   206 Mbits/sec    0   1.01 MBytes       
[  4]  13.00-14.01  sec  11.8 MBytes  98.6 Mbits/sec    0   1.06 MBytes       
[  4]  14.01-15.01  sec  7.18 MBytes  60.2 Mbits/sec    0   1.06 MBytes       
[  4]  15.01-16.00  sec  5.99 MBytes  50.5 Mbits/sec    0   1.06 MBytes       
[  4]  16.00-17.00  sec  6.42 MBytes  53.9 Mbits/sec    0   1.06 MBytes       
[  4]  17.00-18.00  sec  16.9 MBytes   141 Mbits/sec    0   1.12 MBytes       
[  4]  18.00-19.00  sec  24.6 MBytes   207 Mbits/sec    0   1.18 MBytes       
[  4]  19.00-20.00  sec  24.4 MBytes   205 Mbits/sec    0   1.25 MBytes       
[  4]  20.00-21.00  sec  24.0 MBytes   201 Mbits/sec    0   1.31 MBytes       
[  4]  21.00-22.00  sec  19.2 MBytes   161 Mbits/sec    0   1.33 MBytes       
[  4]  22.00-23.00  sec  8.00 MBytes  67.0 Mbits/sec    0   1.36 MBytes       
[  4]  23.00-24.00  sec  7.02 MBytes  59.0 Mbits/sec    0   1.36 MBytes       
[  4]  24.00-25.00  sec  5.88 MBytes  49.3 Mbits/sec    0   1.36 MBytes       
[  4]  25.00-26.00  sec  9.88 MBytes  82.8 Mbits/sec    0   1.39 MBytes       
[  4]  26.00-27.00  sec  25.0 MBytes   210 Mbits/sec    0   1.46 MBytes       
[  4]  27.00-28.00  sec  25.0 MBytes   211 Mbits/sec    0   1.52 MBytes       
[  4]  28.00-29.01  sec  25.1 MBytes   209 Mbits/sec   12   1.10 MBytes       
[  4]  29.01-30.00  sec  24.9 MBytes   210 Mbits/sec    0   1.19 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-30.00  sec   490 MBytes   137 Mbits/sec   12             sender
[  4]   0.00-30.00  sec   488 MBytes   136 Mbits/sec                  receiver

In comparison, when testing to from my 2012 iMac 802.11n (second floor office) ~350Mbps I don’t see the drops in bandwidth

shaunlowe@Nerd Work iMac:~$ iperf3 -c 192.168.1.150 -t 30
Connecting to host 192.168.1.150, port 5201
[  5] local 192.168.1.100 port 63648 connected to 192.168.1.150 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  38.0 MBytes   318 Mbits/sec                  
[  5]   1.00-2.00   sec  33.5 MBytes   280 Mbits/sec                  
[  5]   2.00-3.00   sec  32.6 MBytes   274 Mbits/sec                  
[  5]   3.00-4.00   sec  32.1 MBytes   269 Mbits/sec                  
[  5]   4.00-5.00   sec  35.2 MBytes   295 Mbits/sec                  
[  5]   5.00-6.00   sec  37.9 MBytes   318 Mbits/sec                  
[  5]   6.00-7.00   sec  39.5 MBytes   330 Mbits/sec                  
[  5]   7.00-8.00   sec  40.5 MBytes   341 Mbits/sec                  
[  5]   8.00-9.00   sec  38.4 MBytes   322 Mbits/sec                  
[  5]   9.00-10.00  sec  39.3 MBytes   330 Mbits/sec                  
[  5]  10.00-11.00  sec  39.0 MBytes   327 Mbits/sec                  
[  5]  11.00-12.00  sec  39.6 MBytes   332 Mbits/sec                  
[  5]  12.00-13.00  sec  40.3 MBytes   338 Mbits/sec                  
[  5]  13.00-14.00  sec  39.7 MBytes   333 Mbits/sec                  
[  5]  14.00-15.00  sec  39.6 MBytes   332 Mbits/sec                  
[  5]  15.00-16.00  sec  39.6 MBytes   333 Mbits/sec                  
[  5]  16.00-17.00  sec  39.3 MBytes   330 Mbits/sec                  
[  5]  17.00-18.00  sec  36.9 MBytes   308 Mbits/sec                  
[  5]  18.00-19.00  sec  38.1 MBytes   321 Mbits/sec                  
[  5]  19.00-20.00  sec  35.1 MBytes   295 Mbits/sec                  
[  5]  20.00-21.00  sec  32.0 MBytes   268 Mbits/sec                  
[  5]  21.00-22.00  sec  32.8 MBytes   275 Mbits/sec                  
[  5]  22.00-23.00  sec  33.5 MBytes   280 Mbits/sec                  
[  5]  23.00-24.00  sec  39.6 MBytes   332 Mbits/sec                  
[  5]  24.00-25.00  sec  39.8 MBytes   335 Mbits/sec                  
[  5]  25.00-26.00  sec  31.3 MBytes   262 Mbits/sec                  
[  5]  26.00-27.00  sec  28.6 MBytes   240 Mbits/sec                  
[  5]  27.00-28.00  sec  30.9 MBytes   259 Mbits/sec                  
[  5]  28.00-29.00  sec  32.4 MBytes   272 Mbits/sec                  
[  5]  29.00-30.00  sec  29.5 MBytes   247 Mbits/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-30.00  sec  1.06 GBytes   303 Mbits/sec                  sender
[  5]   0.00-30.05  sec  1.06 GBytes   303 Mbits/sec                  receiver

I’m not sure how to troubleshoot this further, and would appreciate any guidance on how to test?

fzinken · 19 October 2019 00:52

Try to disable background scanning and see if that helps.
Add BackgroundScanning = false to the general section of /etc/connman.conf

sam_nazarko · 19 October 2019 11:51

Do you have QOS enabled?
Can you show us the WiFi settings in your router?

Sam

nerdwork · 19 October 2019 22:18

No QOS enabled.

@fzinken I’ll try disabling background scanning and test again.

nerdwork · 19 October 2019 22:33

So, I tried the iperf test again today before disabling background scanning, and I couldn’t replicate the bandwidth issues.

It looks like something else is causing the issues on the wireless network. I’ll start looking at other devices and try to narrow it down, but for now I don’t think the Vero4K is at fault, just a poor victim.

I did disable background scanning, reboot and retest, but no change. I’m now consistently maintaining 195-200Mbits/sec

darwindesign · 19 October 2019 23:00

I would try moving the 5gz up to something like channel 149 (assuming that is not being used by someone else close by) and see what that gets you. As the two devices are in the same room you may want to see what happens if you turn the 5ghz transmit power down a bit as well.

nerdwork · 19 October 2019 23:28

Another device nearby on 149 which is why I went lower channels. But I’ve bumped it back to channel 157 now, and I’m seeing ~225Mbits/sec.

Thanks for the suggestion, definitely helped.