I have WRT1900ACS v2 running 19.07.2 r10947-65030d81f3
Problem: WiFi (laptop) to LAN (NAS) speed is low (~250mbps) while router reports that laptop is running on 1300mbps WiFi.
Measured with iperf:
WiFi (laptop) <-> LAN (NAS): ~250mbps
LAN (laptop) <-> LAN (NAS): ~900mbps
WiFi (laptop) <-> WAN (another pc): ~250mbps
LAN (laptop) <-> WAN (another pc): ~900mbps
Since I thought that this problem is caused by slow vlan/bridge/routing nonsense I installed iperf on router and ran the tests. Results are promising:
WiFi (laptop) <-> Router: ~550mbps
LAN (laptop) <-> Router: ~700mbps (iperf is CPU bound on router, apparently)
/etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option hwmode '11a'
option path 'soc/soc:pcie/pci0000:00/0000:00:01.0/0000:01:00.0'
option htmode 'VHT80'
option country 'US'
option channel 'auto'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option macaddr '16:91:82:c6:95:04'
option key 'XXX'
option ssid '-WiFi-Z-5G'
option encryption 'psk2+ccmp'
config wifi-device 'radio1'
option type 'mac80211'
option hwmode '11g'
option path 'soc/soc:pcie/pci0000:00/0000:00:02.0/0000:02:00.0'
option htmode 'HT20'
option country 'US'
option channel 'auto'
config wifi-iface 'default_radio1'
option device 'radio1'
option mode 'ap'
option macaddr '16:91:82:c6:95:03'
option key 'XXX'
option encryption 'psk2'
option ssid '-WiFi-Z'
option network 'lan'
/etc/config/network
config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fd35:f904:862b::/48'
config interface 'lan'
option type 'bridge'
option proto 'static'
option netmask '255.255.255.0'
option ip6assign '60'
option ipaddr '192.168.0.1'
option ifname 'eth0.1'
config interface 'wan'
option ifname 'eth1.2'
option proto 'dhcp'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '0 1 2 3 5t'
config switch_vlan
option device 'switch0'
option vlan '2'
option ports '4 6t'
I have the same problem on stock firmware as well, WiFi speeds are just a bit better (~280), but that's it.
What am I missing? Is it supposed to be that slow?
I am considering to buy this one and would like to know what is the performance for 2.4GHz WiFi? Can you share your results?
Try a different channel. In particular, disable legacy 802.11b rates, and then you can choose DFS-enabled channels (52-140). They tend to be mostly empty, so there will be less interference and more speed. The caveat is that they initially appear as non-working, because the radio needs to scan for radars. It takes one minute, just wait and don't panic. After that, the AP interface magically becomes enabled.
Tested 2.4GHz:
Laptop: MacBook Pro (15-inch, 2019), distance 1 meter
Router advertises 216 mpbs
Command, ran 5 times: iperf -c 192.168.0.111 -p 5201 -t 60
Stock firmware, default settings:
WiFi (laptop) <-> LAN (NAS): 76 ± 1 mbps
OpenWRT 19.07.2, default settings:
WiFi (laptop) <-> LAN (NAS): 65 ± 3 mbps
I heard that drivers are weird
UPDATE:
Switched back to stock firmware, re-tested, got results that are same as OpenWRT:
WiFi (laptop) <-> LAN (NAS): 65 ± 3 mbps
Performance testing is weird ¯_(ツ)_/¯
disable legacy 802.11b rates
done
DFS-enabled channels (52-140)
didn't work for me, but I have pretty much clear channels in 5GHz, so not a big deal
But still it doesn't explain why WiFi to LAN is slow when WiFi to router is fast...
Have you checked whether both of the cores are being used for transferring data? What is the performance for Samba?
I want to use it for NAS with a USB 3.0 HDD. If the performance is, as you say, then there is no point in purchasing it because right now my TD-W8980 gives me around 40-50 mbps on Samba with HH5A doing the main routing.
Edit (My results):
C:\Users\pakah\Downloads\iperf-3.1.3-win64>iperf3 -c 192.168.1.254 -t 60 -b 0 -i 5
Connecting to host 192.168.1.254, port 5201
[ 4] local 192.168.1.238 port 57512 connected to 192.168.1.254 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-5.00 sec 22.6 MBytes 37.9 Mbits/sec
[ 4] 5.00-10.01 sec 34.5 MBytes 57.8 Mbits/sec
[ 4] 10.01-15.01 sec 29.5 MBytes 49.5 Mbits/sec
[ 4] 15.01-20.01 sec 29.0 MBytes 48.7 Mbits/sec
[ 4] 20.01-25.00 sec 28.2 MBytes 47.5 Mbits/sec
[ 4] 25.00-30.00 sec 39.8 MBytes 66.7 Mbits/sec
[ 4] 30.00-35.00 sec 32.0 MBytes 53.7 Mbits/sec
[ 4] 35.00-40.00 sec 37.4 MBytes 62.7 Mbits/sec
[ 4] 40.00-45.00 sec 34.4 MBytes 57.6 Mbits/sec
[ 4] 45.00-50.00 sec 45.1 MBytes 75.8 Mbits/sec
[ 4] 50.00-55.00 sec 38.4 MBytes 64.4 Mbits/sec
[ 4] 55.00-60.00 sec 38.4 MBytes 64.4 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-60.00 sec 409 MBytes 57.2 Mbits/sec sender
[ 4] 0.00-60.00 sec 409 MBytes 57.2 Mbits/sec receiver
iperf Done.
C:\Users\pakah\Downloads\iperf-3.1.3-win64>iperf3 -c 192.168.1.254 -t 60 -b 0 -i 5
Connecting to host 192.168.1.254, port 5201
[ 4] local 192.168.1.238 port 57515 connected to 192.168.1.254 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-5.01 sec 41.4 MBytes 69.2 Mbits/sec
[ 4] 5.01-10.00 sec 33.1 MBytes 55.7 Mbits/sec
[ 4] 10.00-15.01 sec 36.9 MBytes 61.8 Mbits/sec
[ 4] 15.01-20.01 sec 29.8 MBytes 49.9 Mbits/sec
[ 4] 20.01-25.01 sec 39.8 MBytes 66.7 Mbits/sec
[ 4] 25.01-30.01 sec 31.9 MBytes 53.5 Mbits/sec
[ 4] 30.01-35.01 sec 35.6 MBytes 59.8 Mbits/sec
[ 4] 35.01-40.01 sec 28.6 MBytes 48.0 Mbits/sec
[ 4] 40.01-45.02 sec 30.9 MBytes 51.7 Mbits/sec
[ 4] 45.02-50.01 sec 30.4 MBytes 51.1 Mbits/sec
[ 4] 50.01-55.00 sec 32.2 MBytes 54.2 Mbits/sec
[ 4] 55.00-60.02 sec 31.6 MBytes 52.9 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-60.02 sec 402 MBytes 56.2 Mbits/sec sender
[ 4] 0.00-60.02 sec 402 MBytes 56.2 Mbits/sec receiver
iperf Done.
C:\Users\pakah\Downloads\iperf-3.1.3-win64>iperf3 -c 192.168.1.254 -t 60 -b 0 -i 5 -R
Connecting to host 192.168.1.254, port 5201
Reverse mode, remote host 192.168.1.254 is sending
[ 4] local 192.168.1.238 port 57517 connected to 192.168.1.254 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-5.00 sec 37.1 MBytes 62.3 Mbits/sec
[ 4] 5.00-10.00 sec 46.9 MBytes 78.7 Mbits/sec
[ 4] 10.00-15.01 sec 41.9 MBytes 70.2 Mbits/sec
[ 4] 15.01-20.00 sec 44.3 MBytes 74.6 Mbits/sec
[ 4] 20.00-25.00 sec 38.5 MBytes 64.5 Mbits/sec
[ 4] 25.00-30.00 sec 37.4 MBytes 62.7 Mbits/sec
[ 4] 30.00-35.00 sec 40.9 MBytes 68.6 Mbits/sec
[ 4] 35.00-40.00 sec 40.0 MBytes 67.1 Mbits/sec
[ 4] 40.00-45.00 sec 42.3 MBytes 71.0 Mbits/sec
[ 4] 45.00-50.00 sec 37.8 MBytes 63.5 Mbits/sec
[ 4] 50.00-55.00 sec 39.0 MBytes 65.4 Mbits/sec
[ 4] 55.00-60.00 sec 40.3 MBytes 67.6 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-60.00 sec 487 MBytes 68.1 Mbits/sec 2 sender
[ 4] 0.00-60.00 sec 487 MBytes 68.1 Mbits/sec receiver
iperf Done.
C:\Users\pakah\Downloads\iperf-3.1.3-win64>iperf3 -c 192.168.1.254 -t 60 -b 0 -i 5 -R
Connecting to host 192.168.1.254, port 5201
Reverse mode, remote host 192.168.1.254 is sending
[ 4] local 192.168.1.238 port 57520 connected to 192.168.1.254 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-5.00 sec 44.3 MBytes 74.3 Mbits/sec
[ 4] 5.00-10.00 sec 45.5 MBytes 76.3 Mbits/sec
[ 4] 10.00-15.00 sec 48.7 MBytes 81.8 Mbits/sec
[ 4] 15.00-20.00 sec 39.3 MBytes 65.9 Mbits/sec
[ 4] 20.00-25.00 sec 41.6 MBytes 69.8 Mbits/sec
[ 4] 25.00-30.00 sec 41.9 MBytes 70.2 Mbits/sec
[ 4] 30.00-35.00 sec 44.1 MBytes 74.1 Mbits/sec
[ 4] 35.00-40.00 sec 38.7 MBytes 64.9 Mbits/sec
[ 4] 40.00-45.00 sec 37.7 MBytes 63.3 Mbits/sec
[ 4] 45.00-50.00 sec 32.6 MBytes 54.8 Mbits/sec
[ 4] 50.00-55.00 sec 43.7 MBytes 73.4 Mbits/sec
[ 4] 55.00-60.01 sec 35.4 MBytes 59.2 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-60.01 sec 494 MBytes 69.0 Mbits/sec 2 sender
[ 4] 0.00-60.01 sec 494 MBytes 69.0 Mbits/sec receiver
iperf Done.
My setup is as follows:
HH5A (ADSL2) --> (LAN) TD-W8980
|>> (WiFi) Laptop
So it sums up:
Laptop DL: 68~69 mbps
Laptop UL: 56~57 mbps
I agree, I don't think that you will see much improvement in 2.4GHz.
5GHz – for sure there will be an improvement.
I actually think I may see improvement for Samba. Right now I am getting around 15 mbps UL and 50 mbps DL for Samba because of the ntfs-3g package requiring much CPU for read/write operations on the NTFS drive. If the CPU were powerful enough, as it is for WRT1900ACS, the Samba read/write may actually happen with better speeds. So in case of 2.4GHz it will be at the maximum of WiFi speed (whatever that may be) and 5GHz may also have better speeds up to the maximum of USB interface maybe.
See also this thread for samba speedup tips. Ignore the packet steering advice, it is specific to BT HomeHub.
Guys, thanks for derailing the conversation about my problem 
That is because I have read here about this router having low WiFi speeds. Even though it has a good CPU and RAM, WiFi speeds are not that good and I'm not sure if you can improve it further. But it is possible that WiFi uses only one core (?).
Did you ever figure this out? I'm running the same WRT1900ACS/LEDE build setup. 5ghz wifi client connection shows 250mbps-ish at best. Luci radio bitrate shows 650mbps. In either case, nowhere near the 1300mbps advertised.
I used wifi-analyzer and there's no 5ghz radio interference. It sounds like your connection speeds are much better. Any advice/tweaks on how to get closer to 1300mbps? I read something about a Marvell driver update. Haven't tried that yet.