What are the best parameters for WIFI (ROAMING) - LOST IP

[erdoukki]

I have some few AP in 19.07.7...
I activate the 802.11R on them, but I get sometime a few problem;
My devices may lost their IP...
The WIFI link is OK, and moving to another WIFI reset the IP...
But not automatically...

Anyone have already experienced this and have a tips to fix it ?

here is the configs of the APs...

config wifi-iface 'wifinet1'
	option ssid 'LABORNE'
	option encryption 'psk2'
	option device 'radio0'
	option mode 'ap'
	option key '*****HIDDEN*****'
	option network 'lan'
	option ft_psk_generate_local '1'
	option ieee80211r '1'
	option pmk_r1_push '1'
	option mobility_domain '1234'
	option ft_over_ds '0'

the only changing parameter between all APs are the radio channel which is different on each.

[erdoukki]

I sometimes lost IP like dhcp not served...
Roaming gets me crazy !!!

[Stefan1]

You might want to share some log entries, when roaming is not successful.

[erdoukki]

I do not see nothing relevant...
How can I add debug/trace logging to wifi ?

[dibdot]

set the log_level of the relevant wifi device to 0 or 1.

[erdoukki]

25
Sun Apr 18 16:33:25 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
24
Sun Apr 18 16:33:24 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 IEEE 802.11: disassociated due to inactivity
23
Sun Apr 18 16:33:24 2021
notice
daemon
hostapd: wlan0: AP-STA-DISCONNECTED b0:48:1a:92:ae:74
22
Sun Apr 18 16:25:30 2021
err
daemon
uhttpd[1389]: luci: accepted login on /admin/status/overview for root from 10.6.2.191
21
Sun Apr 18 16:23:14 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 WPA: pairwise key handshake completed (RSN)
20
Sun Apr 18 16:23:14 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 RADIUS: starting accounting session E91AE3B96E54E689
19
Sun Apr 18 16:23:14 2021
notice
daemon
hostapd: wlan0: AP-STA-CONNECTED b0:48:1a:92:ae:74
18
Sun Apr 18 16:23:14 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 IEEE 802.11: associated (aid 1)
17
Sun Apr 18 16:23:14 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 IEEE 802.11: authenticated
16
Sun Apr 18 16:23:14 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 IEEE 802.11: disassociated
15
Sun Apr 18 16:23:14 2021
notice
daemon
hostapd: wlan0: AP-STA-DISCONNECTED b0:48:1a:92:ae:74
14
Sun Apr 18 16:22:43 2021
notice
daemon
hostapd: wlan0: AP-STA-CONNECTED b0:48:1a:92:ae:74
13
Sun Apr 18 16:22:43 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 IEEE 802.11: associated (aid 1)
12
Sun Apr 18 16:22:43 2021
err
daemon
hostapd: nl80211: NL80211_ATTR_STA_VLAN (addr=b0:48:1a:92:ae:74 ifname=wlan0 vlan_id=0) failed: -2 (No such file or directory)

25
Sun Apr 18 16:35:55 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
24
Sun Apr 18 16:35:54 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: disassociated due to inactivity
23
Sun Apr 18 16:35:54 2021
notice
daemon
hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
22
Sun Apr 18 16:28:02 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 WPA: pairwise key handshake completed (RSN)
21
Sun Apr 18 16:28:02 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 RADIUS: starting accounting session 25A8144A4CDD79F5
20
Sun Apr 18 16:28:02 2021
notice
daemon
hostapd: wlan0: AP-STA-CONNECTED b0:48:1a:92:ae:74
19
Sun Apr 18 16:28:02 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 IEEE 802.11: associated (aid 4)
18
Sun Apr 18 16:28:02 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 IEEE 802.11: authenticated
17
Sun Apr 18 16:28:01 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
16
Sun Apr 18 16:28:00 2021
info
daemon
hostapd: wlan0: STA b0:48:1a:92:ae:74 IEEE 802.11: disassociated
15
Sun Apr 18 16:28:00 2021
notice
daemon
hostapd: wlan0: AP-STA-DISCONNECTED b0:48:1a:92:ae:74

25
Sun Apr 18 16:34:25 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)
24
Sun Apr 18 16:34:25 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 RADIUS: starting accounting session 1E80D8E9E080FF00
23
Sun Apr 18 16:34:25 2021
notice
daemon
hostapd: wlan0: AP-STA-CONNECTED 04:b1:67:4f:6c:c0
22
Sun Apr 18 16:34:25 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: associated (aid 1)
21
Sun Apr 18 16:34:25 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: authenticated
20
Sun Apr 18 16:34:21 2021
notice
daemon
hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
19
Sun Apr 18 16:34:12 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)
18
Sun Apr 18 16:34:12 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 RADIUS: starting accounting session 6A446A5E3AEC64A5
17
Sun Apr 18 16:34:12 2021
notice
daemon
hostapd: wlan0: AP-STA-CONNECTED 04:b1:67:4f:6c:c0
16
Sun Apr 18 16:34:12 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: associated (aid 1)
15
Sun Apr 18 16:34:12 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: authenticated
14
Sun Apr 18 16:34:08 2021
notice
daemon
hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
13
Sun Apr 18 16:33:58 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)
12
Sun Apr 18 16:33:58 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 RADIUS: starting accounting session 696DAA900601253A
11
Sun Apr 18 16:33:58 2021
notice
daemon
hostapd: wlan0: AP-STA-CONNECTED 04:b1:67:4f:6c:c0
10
Sun Apr 18 16:33:58 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: associated (aid 1)
9
Sun Apr 18 16:33:58 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: authenticated
8
Sun Apr 18 16:33:54 2021
notice
daemon
hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
7
Sun Apr 18 16:33:45 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)
6
Sun Apr 18 16:33:45 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 RADIUS: starting accounting session D025C294639E26CD
5
Sun Apr 18 16:33:45 2021
notice
daemon
hostapd: wlan0: AP-STA-CONNECTED 04:b1:67:4f:6c:c0
4
Sun Apr 18 16:33:45 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: associated (aid 1)
3
Sun Apr 18 16:33:45 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: authenticated
2
Sun Apr 18 16:33:41 2021
notice
daemon
hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
1
Sun Apr 18 16:33:30 2021
info
daemon
hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)

[erdoukki]

@erdoukki

hostapd: nl80211: NL80211_ATTR_STA_VLAN (addr=b0:48:1a:92:ae:74 ifname=wlan0 vlan_id=0) failed: -2 (No such file or directory)

is this part of the problem ?

802.11r broken in recent master (NL80211_ATTR_STA_VLAN errors)?

Thanks for the tip! It looks like 802.11r FT works on WRT1900ACV2(ACS) and WRT1900ACS, but occasionally throws errors !? I have just put FT-OVER-DS setting to FT-OVER-THE-AIR and my iPad looks getting DHCP address again while roaming... Edit : not really stable solution, I lost my IP sometimes again !!

I use ath10k-ct and switch back to non-ct firmware and modules !

On the main routeur (LGM) I have centralized the AP logs...
Here a android getting WiFi access but no IP so no Internet ! (part of the problem)

Apr 18 17:24:47 BORNE-RDC hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:24:51 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: authenticated
Apr 18 17:24:51 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: associated (aid 7)
Apr 18 17:24:51 BORNE-RDC hostapd: wlan0: AP-STA-CONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:24:51 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 RADIUS: starting accounting session A63E4706601F75CB
Apr 18 17:24:51 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)
Apr 18 15:24:51 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:24:51 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:24:56 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:24:56 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:25:00 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:00 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 17:25:06 BORNE-RDC hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:25:10 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: authenticated
Apr 18 17:25:10 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: associated (aid 7)
Apr 18 17:25:10 BORNE-RDC hostapd: wlan0: AP-STA-CONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:25:10 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 RADIUS: starting accounting session 427B4A0FB3E1E7B1
Apr 18 17:25:10 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)
Apr 18 15:25:10 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:10 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:25:13 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:13 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:25:16 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:16 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 17:25:21 BORNE-RDC hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:25:25 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: authenticated
Apr 18 17:25:25 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: associated (aid 7)
Apr 18 17:25:25 BORNE-RDC hostapd: wlan0: AP-STA-CONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:25:25 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 RADIUS: starting accounting session 10131A9913B9652A
Apr 18 17:25:25 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)
Apr 18 15:25:25 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:25 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:25:29 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:29 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:25:33 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:33 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 17:25:37 BORNE-RDC hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:25:41 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: authenticated
Apr 18 17:25:41 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: associated (aid 7)
Apr 18 17:25:41 BORNE-RDC hostapd: wlan0: AP-STA-CONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:25:41 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 RADIUS: starting accounting session C2296C402425CE0F
Apr 18 17:25:41 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)
Apr 18 15:25:41 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:41 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:25:44 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:44 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:25:48 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:48 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 17:25:52 BORNE-RDC hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:25:57 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: authenticated
Apr 18 17:25:57 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: associated (aid 7)
Apr 18 17:25:58 BORNE-RDC hostapd: wlan0: AP-STA-CONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:25:58 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 RADIUS: starting accounting session 89EB21019BD85B62
Apr 18 17:25:58 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)
Apr 18 15:25:58 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:25:58 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:26:00 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:26:00 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:26:04 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:26:04 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 17:26:08 BORNE-RDC hostapd: wlan0: AP-STA-DISCONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:26:11 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: authenticated
Apr 18 17:26:11 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 IEEE 802.11: associated (aid 7)
Apr 18 17:26:11 BORNE-RDC hostapd: wlan0: AP-STA-CONNECTED 04:b1:67:4f:6c:c0
Apr 18 17:26:11 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 RADIUS: starting accounting session 1ED64F48698C4335
Apr 18 17:26:11 BORNE-RDC hostapd: wlan0: STA 04:b1:67:4f:6c:c0 WPA: pairwise key handshake completed (RSN)
Apr 18 15:26:11 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:26:11 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:26:14 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:26:14 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 
Apr 18 15:26:18 LGM dnsmasq-dhcp[2676]: DHCPDISCOVER(br-lan) 04:b1:67:4f:6c:c0 
Apr 18 15:26:18 LGM dnsmasq-dhcp[2676]: DHCPOFFER(br-lan) 10.6.2.126 04:b1:67:4f:6c:c0 

root@LGM:~# tcpdump -i br-lan -n port 67 and port 68
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on br-lan, link-type EN10MB (Ethernet), capture size 262144 bytes
17:54:48.614283 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 04:b1:67:4f:6c:c0, length 294
17:54:48.617405 IP 10.6.2.1.67 > 10.6.2.126.68: BOOTP/DHCP, Reply, length 310
17:54:54.494603 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 04:b1:67:4f:6c:c0, length 294
17:54:54.498114 IP 10.6.2.1.67 > 10.6.2.126.68: BOOTP/DHCP, Reply, length 310
17:55:02.938615 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 04:b1:67:4f:6c:c0, length 294
17:55:02.942330 IP 10.6.2.1.67 > 10.6.2.126.68: BOOTP/DHCP, Reply, length 310
17:55:08.701774 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 04:b1:67:4f:6c:c0, length 294
17:55:08.705668 IP 10.6.2.1.67 > 10.6.2.126.68: BOOTP/DHCP, Reply, length 310
17:55:11.303001 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from d8:12:65:85:d4:ad, length 289
17:55:11.306966 IP 10.6.2.1.67 > 10.6.2.191.68: BOOTP/DHCP, Reply, length 310
17:55:11.382997 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from d8:12:65:85:d4:ad, length 295
17:55:11.398933 IP 10.6.2.1.67 > 10.6.2.191.68: BOOTP/DHCP, Reply, length 317
17:55:16.345549 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 04:b1:67:4f:6c:c0, length 294
17:55:16.349238 IP 10.6.2.1.67 > 10.6.2.126.68: BOOTP/DHCP, Reply, length 310
17:55:22.309138 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 04:b1:67:4f:6c:c0, length 294
17:55:22.314506 IP 10.6.2.1.67 > 10.6.2.126.68: BOOTP/DHCP, Reply, length 310
17:55:29.793887 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 04:b1:67:4f:6c:c0, length 294
17:55:29.797982 IP 10.6.2.1.67 > 10.6.2.126.68: BOOTP/DHCP, Reply, length 310
17:55:35.515645 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 04:b1:67:4f:6c:c0, length 294
17:55:35.522461 IP 10.6.2.1.67 > 10.6.2.126.68: BOOTP/DHCP, Reply, length 310

[Stefan1]

1. Many people anonymize their MAC-Adresses in postings. You might consider editing your posts and replacing the mac-Adresses by MAC-1, MAC-2,...

2. You are referring to an issue on master. I thought you are running 19.07.7 on your APs. Do you also have devices running snapshot ?

3. Do you use dynamic vlans based on radius authentication?

[erdoukki]

@Stefan1

You are referring to an issue on master. I thought you are running 19.07.7 on your APs. Do you also have devices running snapshot ?

no... all are 19.07.7

@Stefan1

Do you use dynamic vlans based on radius authentication?

no

[Stefan1]

The thread 802.11r broken in recent master (NL80211_ATTR_STA_VLAN errors)? - #7 by erdoukki talks about master, not about 19.07.7.

You mention an iPad there. Apple does not support 802.11r at all. Please see for example

Could 802.11r be occasionally gumming up my MacBook's WiFi connection?

I'm trying to troubleshoot an issue where "the WiFi" on a MacBook Pro (Early 2015, running macOS 10.14.6) occasionally "gets confused". I have three different OpenWrt Access Points set up, two in the house and one in a detached office. One of the SSIDs shares the same name across all of them and I also set up 802.11r with the basics (same "Mobility Domain" value, I might have checked "Generate PMK locally" if that wasn't already the default…) Sometimes but not always when I open this laptop up…

Do you have the problem also on non-apple devices ?

[erdoukki]

@Stefan1

Do you have the problem also on non-apple devices ?

Yes...
Android, laptop, iphone...

Wi-Fi network roaming with 802.11k, 802.11r, and 802.11v on iOS, iPadOS, and...

[erdoukki]

my problem is similar to : Bridged wifi ap, DHCP Offers only reaching clients after 5 min period

When disabling all AP the 802.11r I get same problems...

[Stefan1]

Can you provide a list of your used HW for router, APs, switches and the connections between them ? Also a drawing of the topology would help. Have you made sure there are no loops in your topology ?

[erdoukki]

adding these two lines to /etc/rc.local on the main routeur and all AP look to fix the problem...

# cat /sys/class/net/br-lan/bridge/ageing_time 
brctl setageing br-lan 10

still testing !