Xiaomi 4, 4a, 3g and Fast Transition

Installing and Using OpenWrt Network and Wireless Configuration
1

Hi,
I've surrender trying to solve it myself and signed up here.
My configuration is xiaomi 4a gigabit as entry point from ISP with WiFi disabled. Xiaomi 3g and Xiaomi 4 connected to it by cable. I wanted to make fast transition network with it. Testing it with OnePlus 9 and audio streaming and voice/video calls. The problem is when phone changes AP with better signal, my connection drops for about 1-2 minutes and only after that time streams get back. If I get back to first AP and phone connects to it, stream gets back simultaneously. I understand that connection to new AP needs some time but don't think it should be that much.
My configs for both AP I expect to work with FT:

config wifi-device 'radio0'
      option type 'mac80211'
      option path '1e140000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0'
      option band '2g'
      option htmode 'HT20'
      option cell_density '0'
      option channel '1'

config wifi-iface 'default_radio0'
      option device 'radio0'
      option network 'lan'
      option mode 'ap'
      option ssid 'xxx'
      option key 'xxx'
      option dtim_period '3'
      option encryption 'psk2'
      option ft_over_ds '0'
      option time_advertisement '2'
      option time_zone 'GMT0'
      option ieee80211r '1'
      option ieee80211v '0'
      option ieee80211w '0'
      option log_level '3'
      option mobility_domain '1234'
      option ft_psk_generate_local '1'
      option wmm '0'
      option logger_syslog_level '1'
      option reassociation_deadline '15000'

config wifi-device 'radio1'
      option type 'mac80211'
      option path '1e140000.pcie/pci0000:00/0000:00:01.0/0000:02:00.0'
      option band '5g'
      option cell_density '0'
      option htmode 'VHT40'
      option channel '36'

config wifi-iface 'default_radio1'
      option device 'radio1'
      option network 'lan'
      option mode 'ap'
      option ssid 'xxx'
      option key 'xxx'
      option dtim_period '3'
      option encryption 'psk2'
      option ft_over_ds '0'
      option time_advertisement '2'
      option time_zone 'GMT0'
      option ieee80211r '1'
      option ieee80211v '0'
      option ieee80211w '0'
      option log_level '3'
      option mobility_domain '1234'
      option ft_psk_generate_local '1'
      option wmm '0'
      option logger_syslog_level '1'
      option reassociation_deadline '15000'

In logs I see that FT occurs:

Thu Apr 13 11:28:48 2023 daemon.err hostapd: nl80211: kernel reports: key addition failed
Thu Apr 13 11:28:48 2023 daemon.debug hostapd: wlan1: STA 3e:xxxx:54:8a IEEE 802.11: binding station to interface 'wlan1'
Thu Apr 13 11:28:48 2023 daemon.debug hostapd: wlan1: STA 3e:xxxx:54:8a IEEE 802.11: authentication OK (FT)
Thu Apr 13 11:28:48 2023 daemon.debug hostapd: wlan1: STA 3e:xxxx:54:8a MLME: MLME-AUTHENTICATE.indication(3e:xxxx:54:8a, FT)
Thu Apr 13 11:28:48 2023 daemon.debug hostapd: wlan1: STA 3e:xxxx:54:8a IEEE 802.11: association OK (aid 1)
Thu Apr 13 11:28:48 2023 daemon.info hostapd: wlan1: STA 3e:xxxx:54:8a IEEE 802.11: associated (aid 1)
Thu Apr 13 11:28:48 2023 daemon.notice hostapd: wlan1: AP-STA-CONNECTED 3e:xxxx:54:8a
Thu Apr 13 11:28:48 2023 daemon.debug hostapd: wlan1: STA 3e:xxxx:54:8a MLME: MLME-REASSOCIATE.indication(3e:xxxx:54:8a)
Thu Apr 13 11:28:48 2023 daemon.debug hostapd: wlan1: STA 3e:xxxx:54:8a IEEE 802.11: binding station to interface 'wlan1'
Thu Apr 13 11:28:48 2023 daemon.debug hostapd: wlan1: STA 3e:xxxx:54:8a WPA: event 6 notification
Thu Apr 13 11:28:48 2023 daemon.debug hostapd: wlan1: STA 3e:xxxx:54:8a WPA: FT authentication already completed - do not start 4-way handshake

I've made some experiments with 802.11k/v, generating key locally and setting reassociation_deadline to 15000 and 20000 with no luck.
Appreciating any help, thanks in advance!

2

You can try DAWN.

1 Like
3

I've tried but not sure configured it right. Maybe next time will try again but for now I want to figure out why it doesn't work with FT.

4

I've also tested with iphone and it seems to be faster. About 10 seconds taken to restore online radio stream. And one more thing. Transitioning from one band to another within one AP works with minimal delay in online radio listening.