29 replies to this topic

[sjlouis]

Ok but just next to the box, do not exceed 420Gbps, it's a lousy approximation.

 

Thank you guys .

[sjlouis]

40H3X and/or WW, what Unifi device are you using? And what is the WiFi speed from the Internet box to the Unifi and Wifi from the Unifi to the Enigma box?

 

My Gli-net is also an access point.

[WanWizard]

I use "U6 Lite" access points, and I have installed the Unifi controller on a Linux VM (easiest for me as I have an ESX server running).

 

The AP's are wired connected to my switch via 1Gbps UTP. The switch has a 10Gbps connection to the ESX server, which also runs my Internet firewall (I don't have a standard ISP router in use, the firewall has 2 ethernet WAN interfaces that connect directly to a fibre ONT and a DSL modem for backup).

 

My Duo 4K, which does all my recordings (to a NAS, also virtualized on ESX), is also connected via UTP, 1Gbps.

 

Wifi performance from 3 boxes to the Duo 4K. Note that the bitrate reported is the connected rate, which (as I wrote before) says absolutely nothing about the throughput.

 

Oh, and something I forgot to mention: the latency over wifi or powerline will be higher (sometimes much higher) than over UTP. Higher latency means less bytes per second.

root@sf8008:~# iwlist  wlan0 bitrate | grep Current
          Current Bit Rate:300 Mb/s

root@sf8008:~# iperf3 -c 172.19.12.56
Connecting to host 172.19.12.56, port 5201
[  5] local 172.19.12.60 port 53872 connected to 172.19.12.56 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  14.3 MBytes   120 Mbits/sec    0    424 KBytes       
[  5]   1.00-2.00   sec  13.0 MBytes   109 Mbits/sec    0    424 KBytes       
[  5]   2.00-3.00   sec  16.9 MBytes   142 Mbits/sec    0    424 KBytes       
[  5]   3.00-4.00   sec  17.3 MBytes   145 Mbits/sec    0    424 KBytes       
[  5]   4.00-5.00   sec  18.4 MBytes   154 Mbits/sec    0    424 KBytes       
[  5]   5.00-6.00   sec  18.6 MBytes   156 Mbits/sec    0    424 KBytes       
[  5]   6.00-7.00   sec  18.3 MBytes   153 Mbits/sec    0    424 KBytes       
[  5]   7.00-8.00   sec  18.4 MBytes   154 Mbits/sec    0    424 KBytes       
[  5]   8.00-9.00   sec  18.6 MBytes   156 Mbits/sec    0    424 KBytes       
[  5]   9.00-10.00  sec  18.0 MBytes   151 Mbits/sec    0    424 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   172 MBytes   144 Mbits/sec    0             sender
[  5]   0.00-10.02  sec   171 MBytes   143 Mbits/sec                  receiver

iperf Done.

root@vusolo4k:~# iwlist wlan0 bitrate | grep Current
          Current Bit Rate=270 Mb/s

root@vusolo4k:~# iperf3 -c 172.19.12.56
Connecting to host 172.19.12.56, port 5201
[  5] local 172.19.12.52 port 50209 connected to 172.19.12.56 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  8.38 MBytes  70.2 Mbits/sec    0    235 KBytes       
[  5]   1.00-2.00   sec  9.25 MBytes  77.6 Mbits/sec    0    311 KBytes       
[  5]   2.00-3.00   sec  9.50 MBytes  79.7 Mbits/sec    0    362 KBytes       
[  5]   3.00-4.00   sec  9.38 MBytes  78.6 Mbits/sec    0    400 KBytes       
[  5]   4.00-5.00   sec  8.75 MBytes  73.4 Mbits/sec    0    414 KBytes       
[  5]   5.00-6.00   sec  9.50 MBytes  79.7 Mbits/sec    0    414 KBytes       
[  5]   6.00-7.00   sec  9.38 MBytes  78.6 Mbits/sec    0    414 KBytes       
[  5]   7.00-8.00   sec  9.12 MBytes  76.5 Mbits/sec    0    414 KBytes       
[  5]   8.00-9.00   sec  9.88 MBytes  82.8 Mbits/sec    0    414 KBytes       
[  5]   9.00-10.00  sec  8.62 MBytes  72.3 Mbits/sec   15    300 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  91.8 MBytes  77.0 Mbits/sec   15             sender
[  5]   0.00-10.03  sec  91.4 MBytes  76.5 Mbits/sec                  receiver

iperf Done.

root@ustym4kultimate:~# iwlist wlan0 bitrate | grep Current
          Current Bit Rate:867 Mb/s

root@ustym4kultimate:~# iperf3 -c 172.19.12.56
Connecting to host 172.19.12.56, port 5201
[  5] local 172.19.12.70 port 42004 connected to 172.19.12.56 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  27.0 MBytes   227 Mbits/sec    0    416 KBytes       
[  5]   1.00-2.00   sec  29.6 MBytes   249 Mbits/sec    0    416 KBytes       
[  5]   2.00-3.00   sec  29.2 MBytes   245 Mbits/sec    0    416 KBytes       
[  5]   3.00-4.00   sec  29.7 MBytes   249 Mbits/sec    0    416 KBytes       
[  5]   4.00-5.00   sec  29.5 MBytes   247 Mbits/sec    0    416 KBytes       
[  5]   5.00-6.00   sec  29.3 MBytes   246 Mbits/sec    0    416 KBytes       
[  5]   6.00-7.00   sec  29.5 MBytes   247 Mbits/sec    0    416 KBytes       
[  5]   7.00-8.00   sec  29.3 MBytes   246 Mbits/sec    0    416 KBytes       
[  5]   8.00-9.00   sec  29.1 MBytes   244 Mbits/sec    0    416 KBytes       
[  5]   9.00-10.00  sec  29.6 MBytes   249 Mbits/sec    0    416 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   292 MBytes   245 Mbits/sec    0             sender
[  5]   0.00-10.02  sec   291 MBytes   243 Mbits/sec                  receiver

iperf Done.

For reference, my laptop does this, so it looks like the DUO 4K maxes out at about 500Mbps:

[wanwizard@alfred] $ iw dev wlp0s20f3 link
Connected to 78:45:58:63:dc:42 (on wlp0s20f3)
	SSID: Dutchie
	freq: 5500.0
	RX: 4067379368 bytes (104274988 packets)
	TX: 2169086163 bytes (99034547 packets)
	signal: -42 dBm
	rx bitrate: 960.7 MBit/s 80MHz HE-MCS 9 HE-NSS 2 HE-GI 0 HE-DCM 0
	tx bitrate: 1200.9 MBit/s 80MHz HE-MCS 11 HE-NSS 2 HE-GI 0 HE-DCM 0
	bss flags: short-slot-time
	dtim period: 3
	beacon int: 100

[wanwizard@alfred] $ iperf3 -c 172.19.12.56
Connecting to host 172.19.12.56, port 5201
[  5] local 172.19.15.52 port 37360 connected to 172.19.12.56 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  55.1 MBytes   462 Mbits/sec    0    430 KBytes       
[  5]   1.00-2.00   sec  55.6 MBytes   467 Mbits/sec    0    430 KBytes       
[  5]   2.00-3.00   sec  57.4 MBytes   481 Mbits/sec    0    430 KBytes       
[  5]   3.00-4.00   sec  58.2 MBytes   489 Mbits/sec    0    430 KBytes       
[  5]   4.00-5.00   sec  58.9 MBytes   494 Mbits/sec    0    430 KBytes       
[  5]   5.00-6.00   sec  56.1 MBytes   471 Mbits/sec    0    430 KBytes       
[  5]   6.00-7.00   sec  54.0 MBytes   453 Mbits/sec   66    380 KBytes       
[  5]   7.00-8.00   sec  58.5 MBytes   491 Mbits/sec    0    411 KBytes       
[  5]   8.00-9.00   sec  58.2 MBytes   489 Mbits/sec    0    411 KBytes       
[  5]   9.00-10.00  sec  55.6 MBytes   466 Mbits/sec    0    411 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   568 MBytes   476 Mbits/sec   66             sender
[  5]   0.00-10.03  sec   567 MBytes   474 Mbits/sec                  receiver

iperf Done.

[sjlouis]

I use speedtest by Ookla which allows you to do internet speed tests on Windows and Android. Since I have fiber, it is the devices that limit the speed.
 

https://www.speedtest.net/

 

I just blame it for only keeping the last measurement and not making an average. Another consumer association (Que choisir) site also offers a test that works in the same way.

How do you run these tests?

[WanWizard]

It is a tool called ipref3. It is available in any linux distro, in the feed on the box ("opkg install ipref3") and you can download binaries for other platforms here: https://iperf.fr/iperf-download.php

 

It measures point-to-point throughput and is very good at saturating the links, and very interestingly, has a UDP mode ( --udp on the client ) which can show you the latency difference that a TCP connection introduces (roundtrip delay).

 

In a now distant past, I used to work for GE Information Systems (which manages GE's worldwide internal network, and hence my nick, "WAN wizard" ), where we regularly bumped into the problem that bigger links didn't equate to more throughput, because of a 200ms roundtrip, there is only so much TCP sliding windows can compensate for.

 

But I think you're wasting your time. You will never approach a similar throughput over wireless as you get via a cable, due to CSMA (wifi is a shared medium, like the old 10BASE-2 Coax ethernet, so collision detection and forced backoff will slow things down),  the fluctuations in radio transmit speed ( on both sides because of TCP ) and latency. Until you maybe get to 10Gbps wifi, which may match a 1Gpbs cable in terms of throughput.

 

p.s. CSMA also plays a part in interference detection, so even if you have only one device connected to the AP, the AP is still busy listening and reacting to everything around it.

Edited by WanWizard, 3 August 2024 - 15:07.

[sjlouis]

WW, I don't have much knowledge of networking, so I'm feeling my way. I've seen that the Wifi is slower but I'm trying to optimize it.

For one of my problems, when the Ultimo is connected via Wifi to the Gli-net, the WAN network quickly drops out but it seems stable if the Ultimo is connected via LAN to the Gli-net. Not very easy to implement but it's a solution.

[WanWizard]

There are a lot of additional factors at play.

 

For example, in most boxes, the wifi module isn't PCI connected, but connected to an internal USB port. And the SoC's USB ports aren't known for their top speed, plug in a USB stick of disk, and test the throughput. In most cases, it's a pretty sad affair.

 

You bypass that issue when you use the ethernet port, which has a higher throughput.

 

It is one of the reasons we always give the advice not to go for a ( cheap ) USB wifi dongle, but invest a bit more in a wireless bridge, like you have now...

[sjlouis]

The Ultimo has USB 3 ports on the back and they work well, much better than USB 2. I haven't done any testing to compare with Ethernet. I'll have to try that .

[WanWizard]

The internal wifi isn't USB3.

[sjlouis]

OK, I shall do tests to compare   .