Hello,
Forgive my English. I’m brazilian.
I come to ask the help of the professionals, because I have a big problem to solve in the network that I manage.
We have a “RB 922 NetMetal 5” to work on 802.11ac only, as access point.
https://img.routerboard.com/mimg/1121_l.jpg
And all client devices are (ASUS USB-AC56 Dual-band AC1300 USB 3.0). in linux.
https://www.asus.com/us/Networking/USBAC56/overview/
Problem:
With -59 sign, I get download rates of + 12MBps. However upload varies between 512KBps ~ 2.5MBps. 
I do not need to download fast because my scenario is to use the wifi adapter with DVR to send videos to the server.
Tests:
FTP client on linux → FTP server on IIS6.
- The router connected with gigabit cable directly to the server;
- Customers with -80 signal get 1.5MBps download (upload 50KBps);
- With both antennas with distance of 3 meters, upload reaches 6MBps, download ~ 35MBps;
- Test by direct cable (client - server), download and upload are equal ~ 40MBps (up and down);
Here’s my router configuration:
# jan/05/2018 by RouterOS 6.37.4
#
/interface bridge
add admin-mac=64:D1:54:06:93:5E auto-mac=no comment=defconf name=bridge
/interface ethernet
set [ find default-name=sfp1 ] disabled=yes
/ip neighbor discovery
set bridge comment=defconf
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
add authentication-types=wpa2-psk eap-methods="" group-key-update=50m mode=dynamic-keys name=chave supplicant-identity="" wpa-pre-shared-key=************* \
wpa2-pre-shared-key=*************
/interface wireless
set [ find default-name=wlan1 ] antenna-gain=17 band=5ghz-onlyac channel-width=20/40/80mhz-eeeC country="united states" default-ap-tx-limit=1000000 \
default-client-tx-limit=50000000 disabled=no frequency=5240 mode=ap-bridge name=wlan1-buszoom preamble-mode=short radio-name="" rx-chains=0,1 security-profile=\
chave ssid=Wlan-DVR tx-chains=0,1 wps-mode=disabled
/interface bridge port
add bridge=bridge comment=defconf interface=ether1
add bridge=bridge comment=defconf interface=wlan1
/ip address
add address=10.0.0.12/22 interface=bridge network=10.0.0.0
/ip route
add distance=1 gateway=10.0.0.10
/system clock
set time-zone-name=America/Sao_Paulo
/system routerboard settings
set cpu-frequency=720MHz
I made a simulation using as windows client, in this video:
http://cloud.rioguaiba.com.br/direto/problem_upload.mp4
- Will it be something of 802.11ac as WMM?
- If this is not, will this device (asus) not support throughput for upload?
Any help will be welcome. Thank you!