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Opened 3 years ago

Last modified 2 years ago

#19648 new defect

5GHz wireless drops during high load with "disconnected due to excessive missing ACKs" message

Reported by: Sasha_Beluj Owned by: developers
Priority: high Milestone:
Component: base system Version: Trunk
Keywords: 5GHz, dropout Cc:

Description

Device: TP-Link Archer C5 v1.20 (same as C7 v2)
OpenWrt version: latest Trunk (13 May)
Problem: This was tested using 2 Samsung tablets (Tab S and Tab Pro). When I'm copying large file from the network folder to the tablet wifi gots disconnected every 1..2 mins. Here is the part from the log file:

Thu May 14 09:42:50 2015 daemon.info hostapd: wlan1: STA b8:6c:e8:54:d2:e4 IEEE 802.11: disconnected due to excessive missing ACKs
Thu May 14 09:42:54 2015 daemon.info hostapd: wlan0: STA b8:6c:e8:54:d2:e4 IEEE 802.11: authenticated
Thu May 14 09:42:54 2015 daemon.info hostapd: wlan0: STA b8:6c:e8:54:d2:e4 IEEE 802.11: associated (aid 2)
Thu May 14 09:42:54 2015 daemon.info hostapd: wlan0: STA b8:6c:e8:54:d2:e4 WPA: pairwise key handshake completed (RSN)
Thu May 14 09:42:54 2015 daemon.info dnsmasq-dhcp[25178]: DHCPDISCOVER(br-lan) b8:6c:e8:54:d2:e4
Thu May 14 09:42:54 2015 daemon.info dnsmasq-dhcp[25178]: DHCPOFFER(br-lan) 192.168.1.102 b8:6c:e8:54:d2:e4
Thu May 14 09:42:54 2015 daemon.info dnsmasq-dhcp[25178]: DHCPREQUEST(br-lan) 192.168.1.102 b8:6c:e8:54:d2:e4
Thu May 14 09:42:54 2015 daemon.info dnsmasq-dhcp[25178]: DHCPACK(br-lan) 192.168.1.102 b8:6c:e8:54:d2:e4 android-f086b84619ad86a0
Thu May 14 09:43:20 2015 daemon.info hostapd: wlan1: STA b8:6c:e8:54:d2:e4 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)

Same situation while watching video from the network folder. As the result 5GHz band is totally unusable.
During low load (browsing websites) I haven't experienced such issues.

5GHz config:
wireless.radio1=wifi-device
wireless.radio1.type='mac80211'
wireless.radio1.hwmode='11a'
wireless.radio1.path='pci0000:01/0000:01:00.0'
wireless.radio1.htmode='VHT80'
wireless.radio1.disabled='0'
wireless.radio1.country='PL'
wireless.radio1.channel='auto'
wireless.radio1.txpower='19'
wireless.@wifi-iface[1]=wifi-iface
wireless.@wifi-iface[1].device='radio1'
wireless.@wifi-iface[1].network='lan'
wireless.@wifi-iface[1].mode='ap'
wireless.@wifi-iface[1].encryption='psk2'

The other problem is that the speed is really low (< 40 Mbit) - even on 2.4 GHz band speed is higher. But I believe this needs to be a separate ticket.

Attachments (0)

Change History (4)

comment:1 Changed 3 years ago by anonymous

Same Issue on my Archer C7 with CC v.2

comment:2 Changed 2 years ago by Bieniu

Same on TP-Link WDR4300 with CC.

comment:3 Changed 2 years ago by loper

Still a problem for by Archer C7v2

comment:4 Changed 2 years ago by anonymous

Set the channel from 'Auto' to 1xx (any channel over 100 CH).
It would lessen the disconnecting problem on 5GHz.

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