UniFi AP AC LR == max 300 Mbit/s via AC

Installing and Using OpenWrt
1

I have openwrt (for long time, now 23.05.4) on UniFi AP AC LR (https://openwrt.org/toh/ubiquiti/unifiac)

I cannot get more than 300 Mbit/s via AC (5Ghz). UniFi is DUMP AP. Via ethernet I can get 1Gbit/s to NAS. That is my /etc/config/wireless:

config wifi-device 'radio0'
	option type 'mac80211'
	option path 'pci0000:00/0000:00:00.0'
	option band '5g'
	option htmode 'VHT80'
	option channel 'auto'
	option cell_density '0'
	option acs_num_scans '10'
	option country 'PL'

config wifi-iface 'default_radio0'
	option device 'radio0'
	option network 'lan'
	option mode 'ap'
	option ssid 'myssid'
	option key 'secret123'
	option encryption 'sae'

config wifi-device 'radio1'
	option type 'mac80211'
	option path 'platform/ahb/18100000.wmac'
	option band '2g'
	option channel 'auto'
	option cell_density '0'
	option country 'PL'
	option txpower '20'
	option htmode 'HT20'

config wifi-iface 'wifinet3'
	option device 'radio1'
	option mode 'ap'
	option ssid 'myssid'
	option encryption 'sae'
	option key 'secret123'
	option network 'lan'

config wifi-iface 'wifinet5'
	option device 'radio1'
	option mode 'ap'
	option ssid 'myssid-guest'
	option encryption 'sae-mixed'
	option isolate '1'
	option macaddr 'random'
	option key 'secret1234'
	option network 'guest'

What am I doing wrong?

2

since the SSIDs have the same name, do you know which one your client's connecting to ?

3

I see it in wireless luci panel. Actually if I disable 2G ssid it changes nothing.

4

and the client used is a .... ?
and how are you testing this ?

if I read the specs correctly they say 867 Mbps (BW80) over 5GHz, I'm not sure you should excpect a lot more than what you're getting.

5

I'm using Iphone12 and laptop with realtek RTL8821CE 802.11ac.

software is:
speedtest ---> to internet
iperf3 ---> to machine in LAN (so iperf3 is not running on AP)

I'm standing 2 meters from AP.

in luci in details of connection I see eg. sth like that:
780.0 Mbit/s, 80 MHz, VHT-MCS 8, VHT-NSS 2, Short GI
866.7 Mbit/s, 80 MHz, VHT-MCS 9, VHT-NSS 2, Short GI

How is it possible I cannot get more than 300 Mbit/s if connection is 780 Mbit/s?

6

the connection speed has nothing to do with the actual speed ...

7

Thus if specs says "867 Mbps (BW80)" in 5Ghz that means that 300 Mbit/s is ok?

8

you're never going to get anywhere near 867, if that's what you're expecting.

I had Archers C2600s as APs before I upgraded to AX, they're 2x the speed of your UniFi over 5GHz on paper/power point/spec:ed, my results were approx 2x the speed you're seeing.

9

Thanks for your contribution! So I do not have to tweak it any more :smiley:

1 Like
10

On 23.04 this is what I get on lan <-> lan :

[ 5] 0.00-10.00 sec 384 MBytes 322 Mbits/sec

On wireless <-> lan I get almost the same number as lan <-> lan.

It seem that the AP can t handle more then 322 Mbits/sec ???

I have other APs (wifi 5 as well) that handle twice as much as the Unifi AC