6 Mbps on Archer C7v3 5GHz network [solved]

Installing and Using OpenWrt Network and Wireless Configuration
1

I just installed 18.06.01 on my TP-Link Archer C7 v3. The 2.4ghz network is running faster than the stock firmware, but the 5ghz is slow as molasses. I'm only seeing 6 Mbps.

The entry from /etc/config/wireless:

config wifi-device 'radio0'
	option type 'mac80211'
	option hwmode '11a'
	option path 'pci0000:01/0000:01:00.0'
	option country 'US'
	option legacy_rates '1'
	option htmode 'VHT80'
	option channel '36'

and iwinfo wlan0 info

wlan0     ESSID: "Redacted"
          Access Point: F4:F2:6D:FC:17:58
          Mode: Master  Channel: 36 (5.180 GHz)
          Tx-Power: 23 dBm  Link Quality: 43/70
          Signal: -67 dBm  Noise: -102 dBm
          Bit Rate: 6.0 MBit/s
          Encryption: WPA2 PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11nac
          Hardware: 168C:003C 0000:0000 [Qualcomm Atheros QCA9880]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

Does anyone have any suggestions for how to improve the performance of my 5ghz network?

2

Can you try changing the channel to see if your issue is interference/congestion on channel 36?

3

I've tried multiple channels, 6Mbps on every channel attempted. Eventually after changing channels the radio seems to have quit on me completely.

4

What happens on 40 MHz?

5

The ath10k driver always reports a TX rate of 6 Mbps. The actual TX rate is correct, and almost always higher than 6 Mb, but driver limitations prevent it being reported back to user space.

Use iwinfo wlan0 assoclist to see the TX (still wrong at 6 Mb) and RX rate (actual) for each station. This will also report the bandwidth that is being used.

I think you need to set the channel to 42 to use 80 MHz in the low end of the band.

6

Well that's nifty isn't it. I assume there's a bug report somewhere, and this isn't community fixable?

7

Thank you for the help. According to my MPB I'm actually seeing >400Mbps TX rate on my 5ghz network.

8

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