WIFI low speed

[seattle]

Need to help to find out why my wifi speed is much lower than LAN. Just sign up Xfinity performance pro. I did speed test on my Router ASUS RU-AC66U with Asuswrt-Merlin Firmware:380.64. The speed meet the 100 down. However, the speed only less than half (40 to 50) on wifi when I set my laptop next to the router. I have setted 2.4G N only with 20 Mhz channel bandwidth. Switched to 40Mhz or 20/40 did not increase speed. Anyone has the same problem that wifi only has half speed? How to fix it.

Thanks and happy new year to everyone!

 

[tsunami2311]

Of all the wireless devices I have only the Surface3 was actual able to get 100mbit down, everything else is 20-50mbit, that is inducing iphone5/6 and current android phones devices. very doubt fulll it the router more likely its how the device it self is setup. possible even the power saving settings on them

 

[bandit8623]

Need to help to find out why my wifi speed is much lower than LAN. Just sign up Xfinity performance pro. I did speed test on my Router ASUS RU-AC66U with Asuswrt-Merlin Firmware:380.64. The speed meet the 100 down. However, the speed only less than half (40 to 50) on wifi when I set my laptop next to the router. I have setted 2.4G N only with 20 Mhz channel bandwidth. Switched to 40Mhz or 20/40 did not increase speed. Anyone has the same problem that wifi only has half speed? How to fix it.

Thanks and happy new year to everyone!

Because your using 2.4ghz. That band is over crowded. Use 5ghz. And also use the wifi analyzer app to see what channels are less crowded.

 

[seattle]

Because your using 2.4ghz. That band is over crowded. Use 5ghz. And also use the wifi analyzer app to see what channels are less crowded.

Well, my laptop is side by side with router. And I am the only one to use channel 4.

 

[bandit8623]

Well, my laptop is side by side with router. And I am the only one to use channel 4.

You should be chosing channel 1 6 or 11. Any others overlap channels. Did you use this https://www.google.com/url?sa=t&sou...x28jtvfnGP_UlkifA&sig2=yZAwSv93rreL1hZVnwjFfg

 

[seattle]

Of all the wireless devices I have only the Surface3 was actual able to get 100mbit down, everything else is 20-50mbit, that is inducing iphone5/6 and current android phones devices. very doubt fulll it the router more likely its how the device it self is setup. possible even the power saving settings on them

I am using win 10 on non surface device. That's bad news for me since I can not fully using the download speed.

 

[bandit8623]

If your using channel 4 you are actually overlapping channel 12456.

 

[bandit8623]

https://www.extremetech.com/computi...your-wifi-speed-by-choosing-the-right-channel

Read that guide. This explains how the channels overlap.

 

[seattle]

I played around the channels from 1 to 11, and the the difference was very small. All of them were less than 60Mpbs.

 

[bandit8623]

Yep that's pretty normal on 2.4. Do your devices not support 5ghz? Did you check to see how many other 2.4 wifis are around you and what channels?

 

[sfx2000]

I have setted 2.4G N only with 20 Mhz channel bandwidth. Switched to 40Mhz or 20/40 did not increase speed. Anyone has the same problem that wifi only has half speed? How to fix it.

Get a better card perhaps?

A lot of the lower end laptops (and tablets) come with single stream 802.11 b/g/n cards - and getting wide channels these days is not likely...

In good conditions, one can expect to get around 35Mb/Sec throughput - see below:

$ iperf3 -c 192.168.1.20 -Z
Connecting to host 192.168.1.20, port 5201
[ 4] local 192.168.1.140 port 52204 connected to 192.168.1.20 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 4.38 MBytes 36.7 Mbits/sec 0 110 KBytes
[ 4] 1.00-2.00 sec 4.14 MBytes 34.8 Mbits/sec 0 124 KBytes
[ 4] 2.00-3.00 sec 4.71 MBytes 39.5 Mbits/sec 0 132 KBytes
[ 4] 3.00-4.00 sec 4.22 MBytes 35.4 Mbits/sec 0 132 KBytes
[ 4] 4.00-5.00 sec 3.37 MBytes 28.3 Mbits/sec 0 132 KBytes
[ 4] 5.00-6.00 sec 3.71 MBytes 31.2 Mbits/sec 0 132 KBytes
[ 4] 6.00-7.00 sec 4.25 MBytes 35.7 Mbits/sec 0 197 KBytes
[ 4] 7.00-8.00 sec 4.46 MBytes 37.4 Mbits/sec 0 197 KBytes
[ 4] 8.00-9.00 sec 3.97 MBytes 33.3 Mbits/sec 0 197 KBytes
[ 4] 9.00-10.00 sec 4.46 MBytes 37.4 Mbits/sec 0 310 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 41.7 MBytes 35.0 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 41.3 MBytes 34.7 Mbits/sec receiver​

 

[bandit8623]

Get a better card perhaps?

A lot of the lower end laptops (and tablets) come with single stream 802.11 b/g/n cards - and getting wide channels these days is not likely...

In good conditions, one can expect to get around 35Mb/Sec throughput - see below:

$ iperf3 -c 192.168.1.20 -Z
Connecting to host 192.168.1.20, port 5201
[ 4] local 192.168.1.140 port 52204 connected to 192.168.1.20 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 4.38 MBytes 36.7 Mbits/sec 0 110 KBytes
[ 4] 1.00-2.00 sec 4.14 MBytes 34.8 Mbits/sec 0 124 KBytes
[ 4] 2.00-3.00 sec 4.71 MBytes 39.5 Mbits/sec 0 132 KBytes
[ 4] 3.00-4.00 sec 4.22 MBytes 35.4 Mbits/sec 0 132 KBytes
[ 4] 4.00-5.00 sec 3.37 MBytes 28.3 Mbits/sec 0 132 KBytes
[ 4] 5.00-6.00 sec 3.71 MBytes 31.2 Mbits/sec 0 132 KBytes
[ 4] 6.00-7.00 sec 4.25 MBytes 35.7 Mbits/sec 0 197 KBytes
[ 4] 7.00-8.00 sec 4.46 MBytes 37.4 Mbits/sec 0 197 KBytes
[ 4] 8.00-9.00 sec 3.97 MBytes 33.3 Mbits/sec 0 197 KBytes
[ 4] 9.00-10.00 sec 4.46 MBytes 37.4 Mbits/sec 0 310 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 41.7 MBytes 35.0 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 41.3 MBytes 34.7 Mbits/sec receiver​

That's pretty much lab setting. With no other interference. So if you actually see that then you don't have neighbors close enough. There are only 3 channels that can be used in an area without interference. 1 6 and 11. In my neighborhood i see 12 different ssids on 2.4. Its impossible to find a perfect clean channel. I see 60mps about on my 2.4 with the 68u. I use my 5ghz for most devices. And i see 300mbps over that.

You are correct though the device makes a big difference too. If its an on single n or g card you will never see any food speed.

 

[sfx2000]

For the test above...

$ iw dev wlan0 link
Connected to 90:72:40:xx:xx:xx (on wlan0)
SSID: xxxxxxxxxxxxxx
freq: 2437
RX: 58506657 bytes (46587 packets)
TX: 51083653 bytes (40702 packets)
signal: -28 dBm
tx bitrate: 72.2 MBit/s

bss flags: short-slot-time
dtim period: 3
beacon int: 100​

 

[bandit8623]

For the test above...

$ iw dev wlan0 link
Connected to 90:72:40:xx:xx:xx (on wlan0)
SSID: xxxxxxxxxxxxxx
freq: 2437
RX: 58506657 bytes (46587 packets)
TX: 51083653 bytes (40702 packets)
signal: -28 dBm
tx bitrate: 72.2 MBit/s

bss flags: short-slot-time
dtim period: 3
beacon int: 100​

Your test shows you getting 4 MB/s or 32 mbits. You are getting slower speed than the tbread starter.

 

[sfx2000]

One last thought - this is CoxHSI which promises a 150/10 connection... on a good day it does..

$ iperf3 -c iperf.he.net
Connecting to host iperf.he.net, port 5201
[ 6] local 192.168.1.128 port 61977 connected to 216.218.227.10 port 5201
[ ID] Interval Transfer Bandwidth
[ 6] 0.00-1.00 sec 909 KBytes 7.41 Mbits/sec
[ 6] 1.00-2.00 sec 1.19 MBytes 10.0 Mbits/sec
[ 6] 2.00-3.00 sec 1.18 MBytes 9.88 Mbits/sec
[ 6] 3.00-4.00 sec 969 KBytes 7.93 Mbits/sec
[ 6] 4.00-5.00 sec 1.15 MBytes 9.63 Mbits/sec
[ 6] 5.00-6.00 sec 1.06 MBytes 8.90 Mbits/sec
[ 6] 6.00-7.00 sec 1.14 MBytes 9.58 Mbits/sec
[ 6] 7.00-8.00 sec 1.05 MBytes 8.79 Mbits/sec
[ 6] 8.00-9.00 sec 1.17 MBytes 9.85 Mbits/sec
[ 6] 9.00-10.00 sec 1.20 MBytes 10.1 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 6] 0.00-10.00 sec 11.0 MBytes 9.21 Mbits/sec sender
[ 6] 0.00-10.00 sec 10.9 MBytes 9.14 Mbits/sec receiver

iperf Done.

$ iperf3 -c iperf.he.net -R
Connecting to host iperf.he.net, port 5201
Reverse mode, remote host iperf.he.net is sending
[ 6] local 192.168.1.128 port 61979 connected to 216.218.227.10 port 5201
[ ID] Interval Transfer Bandwidth
[ 6] 0.00-1.00 sec 12.5 MBytes 105 Mbits/sec
[ 6] 1.00-2.00 sec 14.1 MBytes 118 Mbits/sec
[ 6] 2.00-3.00 sec 15.3 MBytes 128 Mbits/sec
[ 6] 3.00-4.00 sec 14.5 MBytes 122 Mbits/sec
[ 6] 4.00-5.00 sec 12.5 MBytes 105 Mbits/sec
[ 6] 5.00-6.00 sec 13.4 MBytes 112 Mbits/sec
[ 6] 6.00-7.00 sec 14.1 MBytes 118 Mbits/sec
[ 6] 7.00-8.00 sec 14.0 MBytes 118 Mbits/sec
[ 6] 8.00-9.00 sec 14.0 MBytes 118 Mbits/sec
[ 6] 9.00-10.00 sec 14.2 MBytes 119 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 6] 0.00-10.00 sec 142 MBytes 119 Mbits/sec 2 sender
[ 6] 0.00-10.00 sec 139 MBytes 117 Mbits/sec receiver

iperf Done.​

 

[sfx2000]

Your test shows you getting 4 MB/s or 32 mbits. You are getting slower speed than the tbread starter.

Always talked about Mbits/Sec...

 

[bandit8623]

One last thought - this is CoxHSI which promises a 150/10 connection... on a good day it does..

$ iperf3 -c iperf.he.net
Connecting to host iperf.he.net, port 5201
[ 6] local 192.168.1.128 port 61977 connected to 216.218.227.10 port 5201
[ ID] Interval Transfer Bandwidth
[ 6] 0.00-1.00 sec 909 KBytes 7.41 Mbits/sec
[ 6] 1.00-2.00 sec 1.19 MBytes 10.0 Mbits/sec
[ 6] 2.00-3.00 sec 1.18 MBytes 9.88 Mbits/sec
[ 6] 3.00-4.00 sec 969 KBytes 7.93 Mbits/sec
[ 6] 4.00-5.00 sec 1.15 MBytes 9.63 Mbits/sec
[ 6] 5.00-6.00 sec 1.06 MBytes 8.90 Mbits/sec
[ 6] 6.00-7.00 sec 1.14 MBytes 9.58 Mbits/sec
[ 6] 7.00-8.00 sec 1.05 MBytes 8.79 Mbits/sec
[ 6] 8.00-9.00 sec 1.17 MBytes 9.85 Mbits/sec
[ 6] 9.00-10.00 sec 1.20 MBytes 10.1 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 6] 0.00-10.00 sec 11.0 MBytes 9.21 Mbits/sec sender
[ 6] 0.00-10.00 sec 10.9 MBytes 9.14 Mbits/sec receiver

iperf Done.

$ iperf3 -c iperf.he.net -R
Connecting to host iperf.he.net, port 5201
Reverse mode, remote host iperf.he.net is sending
[ 6] local 192.168.1.128 port 61979 connected to 216.218.227.10 port 5201
[ ID] Interval Transfer Bandwidth
[ 6] 0.00-1.00 sec 12.5 MBytes 105 Mbits/sec
[ 6] 1.00-2.00 sec 14.1 MBytes 118 Mbits/sec
[ 6] 2.00-3.00 sec 15.3 MBytes 128 Mbits/sec
[ 6] 3.00-4.00 sec 14.5 MBytes 122 Mbits/sec
[ 6] 4.00-5.00 sec 12.5 MBytes 105 Mbits/sec
[ 6] 5.00-6.00 sec 13.4 MBytes 112 Mbits/sec
[ 6] 6.00-7.00 sec 14.1 MBytes 118 Mbits/sec
[ 6] 7.00-8.00 sec 14.0 MBytes 118 Mbits/sec
[ 6] 8.00-9.00 sec 14.0 MBytes 118 Mbits/sec
[ 6] 9.00-10.00 sec 14.2 MBytes 119 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 6] 0.00-10.00 sec 142 MBytes 119 Mbits/sec 2 sender
[ 6] 0.00-10.00 sec 139 MBytes 117 Mbits/sec receiver

iperf Done.​

thats better! your tx rate on the previous only showed a link speed of 72mbits

 

[bandit8623]

Always talked about Mbits/Sec...

i must have misread. i would say 35mbit is common middle ground speed. ive seen in crowded areas max out at like 2mbit since there are too many overcrowded channels

 

[sfx2000]

thats better! your tx rate on the previous only showed a link speed of 72mbits

Different client...

Same test to the internal test host over Gbe...

$ iperf3 -c 192.168.1.20 -Z
Connecting to host 192.168.1.20, port 5201
[ 4] local 192.168.1.128 port 62002 connected to 192.168.1.20 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 113 MBytes 944 Mbits/sec
[ 4] 1.00-2.00 sec 112 MBytes 939 Mbits/sec
[ 4] 2.00-3.00 sec 112 MBytes 940 Mbits/sec
[ 4] 3.00-4.00 sec 112 MBytes 937 Mbits/sec
[ 4] 4.00-5.00 sec 111 MBytes 929 Mbits/sec
[ 4] 5.00-6.00 sec 112 MBytes 936 Mbits/sec
[ 4] 6.00-7.00 sec 112 MBytes 940 Mbits/sec
[ 4] 7.00-8.00 sec 111 MBytes 935 Mbits/sec
[ 4] 8.00-9.00 sec 112 MBytes 936 Mbits/sec
[ 4] 9.00-10.00 sec 111 MBytes 933 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.00 sec 1.09 GBytes 937 Mbits/sec sender
[ 4] 0.00-10.00 sec 1.09 GBytes 937 Mbits/sec receiver

iperf Done.

$ iperf3 -c 192.168.1.20 -Z -R
Connecting to host 192.168.1.20, port 5201
Reverse mode, remote host 192.168.1.20 is sending
[ 4] local 192.168.1.128 port 62004 connected to 192.168.1.20 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 111 MBytes 930 Mbits/sec
[ 4] 1.00-2.00 sec 112 MBytes 937 Mbits/sec
[ 4] 2.00-3.00 sec 111 MBytes 935 Mbits/sec
[ 4] 3.00-4.00 sec 112 MBytes 937 Mbits/sec
[ 4] 4.00-5.00 sec 111 MBytes 930 Mbits/sec
[ 4] 5.00-6.00 sec 112 MBytes 937 Mbits/sec
[ 4] 6.00-7.00 sec 111 MBytes 935 Mbits/sec
[ 4] 7.00-8.00 sec 112 MBytes 937 Mbits/sec
[ 4] 8.00-9.00 sec 112 MBytes 937 Mbits/sec
[ 4] 9.00-10.00 sec 112 MBytes 936 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 1.09 GBytes 936 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 1.09 GBytes 935 Mbits/sec receiver

iperf Done.​

 

[bluepoint]

Need to help to find out why my wifi speed is much lower than LAN. Just sign up Xfinity performance pro. I did speed test on my Router ASUS RU-AC66U with Asuswrt-Merlin Firmware:380.64. The speed meet the 100 down. However, the speed only less than half (40 to 50) on wifi when I set my laptop next to the router. I have setted 2.4G N only with 20 Mhz channel bandwidth. Switched to 40Mhz or 20/40 did not increase speed. Anyone has the same problem that wifi only has half speed? How to fix it.

Thanks and happy new year to everyone!

Your link speed will determine how much speed you'll get. Expect 50-70% of the link speed depending on how clean the frequency is. The link speed is determined by the router's/clients number of streams and bandwidth used.
What is your link speed?