Hello,
I am running OpenWrt on Mochabin with the QCA6391 wifi card as dumb AP. As a router/switch combo I am using Mikrotik CCR2004-16G-2S+.
The wireless setup works mostly fine, but has some strange behaviors for a couple of devices (out of 20-25 STAs). For example my phone Pixel 7a has several connection issues during the day - receives IP address, but then the connection timeouts, has long ping times (about 2-5 times more than other devices).
The only "obvious" thing I found in the syslog was the frequent disconnection/connection of the device:
Wed Dec 18 08:32:56 2024 daemon.notice hostapd: phy0-ap0: AP-STA-DISCONNECTED MAC_ADD
Wed Dec 18 08:32:57 2024 daemon.info hostapd: phy0-ap0: STA 32:85:f0:89:6e:e0 IEEE 802.11: authenticated
Wed Dec 18 08:32:57 2024 daemon.info hostapd: phy0-ap0: STA 32:85:f0:89:6e:e0 IEEE 802.11: associated (aid 8)
Wed Dec 18 08:32:57 2024 daemon.notice hostapd: phy0-ap0: AP-STA-CONNECTED MAC_ADD auth_alg=open
Wed Dec 18 08:32:57 2024 daemon.info hostapd: phy0-ap0: STA MAC_ADD RADIUS: starting accounting session 55B82FD3F2500EFF
Wed Dec 18 08:32:57 2024 daemon.info hostapd: phy0-ap0: STA MAC_ADD WPA: pairwise key handshake completed (RSN)
Wed Dec 18 08:32:57 2024 daemon.notice hostapd: phy0-ap0: EAPOL-4WAY-HS-COMPLETED MAC_ADD
Wed Dec 18 08:34:09 2024 daemon.notice hostapd: phy0-ap0: AP-STA-DISCONNECTED MAC_ADD
Wed Dec 18 08:34:15 2024 daemon.info hostapd: phy0-ap0: STA MAC_ADD IEEE 802.11: authenticated
Wed Dec 18 08:34:15 2024 daemon.info hostapd: phy0-ap0: STA MAC_ADD IEEE 802.11: associated (aid 8)
Wed Dec 18 08:34:15 2024 daemon.notice hostapd: phy0-ap0: AP-STA-CONNECTED MAC_ADD auth_alg=open
Wed Dec 18 08:34:15 2024 daemon.info hostapd: phy0-ap0: STA MAC_ADD RADIUS: starting accounting session B74474C819D0D820
Wed Dec 18 08:34:15 2024 daemon.info hostapd: phy0-ap0: STA MAC_ADD WPA: pairwise key handshake completed (RSN)
Wed Dec 18 08:34:15 2024 daemon.notice hostapd: phy0-ap0: EAPOL-4WAY-HS-COMPLETED MAC_ADD
Any ideas what to look for? What tool to use to start investigating? Does it look like an issue of the AP or Mikrotik configuration (wired connection is fine, so is most of the wireless...)?
Thanks for any ideas or suggestions.
Best bet is to look at the config.
Please connect to your OpenWrt device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button:
Remember to redact passwords, MAC addresses and any public IP addresses you may have:
ubus call system board
cat /etc/config/network
cat /etc/config/wireless
cat /etc/config/dhcp
cat /etc/config/firewall
Thank you for your suggestions. Here are the outputs:
root@Mochabin:~# ubus call system board
{
"kernel": "6.6.60",
"hostname": "Mochabin",
"system": "ARMv8 Processor rev 1",
"model": "Globalscale MOCHAbin",
"board_name": "globalscale,mochabin",
"rootfs_type": "ext4",
"release": {
"distribution": "OpenWrt",
"version": "SNAPSHOT",
"revision": "r28085-6720c4ccba",
"target": "mvebu/cortexa72",
"description": "OpenWrt SNAPSHOT r28085-6720c4ccba",
"builddate": "1731585818"
}
}
Yes, its a snaphot build - I tried to update to newer linux firmware to hopefully solve the issues. But the same issues happened even on stable branch.
root@Mochabin:~# cat /etc/config/network
config interface 'loopback'
option device 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fdb5:40a7:db87::/48'
config device
option name 'br-lan'
option type 'bridge'
list ports 'eth0'
list ports 'eth2'
list ports 'lan0'
list ports 'lan1'
list ports 'lan2'
list ports 'lan3'
option vlan_filtering '1'
config interface 'lan'
option device 'br-lan'
option proto 'static'
option netmask '255.255.255.0'
option ip6assign '60'
option ipaddr '10.0.0.3'
option gateway '10.0.0.1'
list dns '1.0.0.1'
list dns '1.1.1.1'
config device
option name 'phy0-ap0'
option ipv6 '0'
root@Mochabin:~# cat /etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option path 'cp0/f2640000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0'
option cell_density '0'
option band '2g'
option htmode 'HE20'
option channel 'auto'
option country 'CZ'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option encryption 'psk2'
option key 'PASS'
option ssid 'SSID'
option disassoc_low_ack '0'
option skip_inactivity_poll '1'
root@Mochabin:~# cat /etc/config/dhcp
config dhcp 'lan'
option interface 'lan'
option start '100'
option limit '150'
option leasetime '12h'
option dhcpv4 'server'
option ignore '1'
config odhcpd 'odhcpd'
option maindhcp '0'
option leasefile '/tmp/hosts/odhcpd'
option leasetrigger '/usr/sbin/odhcpd-update'
option loglevel '4'
config dnsmasq 'DNS'
root@Mochabin:~# cat /etc/config/firewall
config defaults
option input 'ACCEPT'
option output 'ACCEPT'
option forward 'REJECT'
option synflood_protect '1'
Try installing 23.05.5 stable and reset to defaults during the upgrade process.
Then, set your ip address info, disable dhcp, and enable WiFi (set country code, set ssid l, encryption type, passphrase, and enable). Don’t make any other changes.
Test that and see if you have any issues. And if so, please post that new config (which should be closer to defaults)
My device started to work flawlessly at first, but once more devices connected, the issues came back again.
root@OpenWrt:~# ubus call system board
{
"kernel": "5.15.167",
"hostname": "OpenWrt",
"system": "ARMv8 Processor rev 1",
"model": "Globalscale MOCHAbin",
"board_name": "globalscale,mochabin",
"rootfs_type": "ext4",
"release": {
"distribution": "OpenWrt",
"version": "23.05.5",
"revision": "r24106-10cc5fcd00",
"target": "mvebu/cortexa72",
"description": "OpenWrt 23.05.5 r24106-10cc5fcd00"
}
}
root@OpenWrt:~# cat /etc/config/network
config interface 'loopback'
option device 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fd62:9510:3476::/48'
config device
option name 'br-lan'
option type 'bridge'
list ports 'lan0'
list ports 'lan1'
list ports 'lan2'
list ports 'lan3'
config interface 'lan'
option device 'br-lan'
option proto 'static'
option ipaddr '10.0.0.3'
option netmask '255.255.255.0'
option ip6assign '60'
option dns '10.0.0.1'
option gateway '10.0.0.1'
config device
option name 'br-wan'
option type 'bridge'
list ports 'eth0'
list ports 'eth2'
config interface 'wan'
option device 'br-wan'
option proto 'dhcp'
config interface 'wan6'
option device 'br-wan'
option proto 'dhcpv6'
root@OpenWrt:~# cat /etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option path 'cp0/f2640000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0'
option channel 'auto'
option band '2g'
option htmode 'HE80'
option cell_density '0'
option country 'CZ'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option ssid 'SSID'
option encryption 'psk2'
option key 'PASS'
root@OpenWrt:~# cat /etc/config/dhcp
config dnsmasq
option domainneeded '1'
option boguspriv '1'
option filterwin2k '0'
option localise_queries '1'
option rebind_protection '1'
option rebind_localhost '1'
option local '/lan/'
option domain 'lan'
option expandhosts '1'
option nonegcache '0'
option cachesize '1000'
option authoritative '1'
option readethers '1'
option leasefile '/tmp/dhcp.leases'
option resolvfile '/tmp/resolv.conf.d/resolv.conf.auto'
option nonwildcard '1'
option localservice '1'
option ednspacket_max '1232'
option filter_aaaa '0'
option filter_a '0'
config dhcp 'lan'
option interface 'lan'
option start '100'
option limit '150'
option leasetime '12h'
option dhcpv4 'server'
option dhcpv6 'server'
option ra 'server'
list ra_flags 'managed-config'
list ra_flags 'other-config'
option ignore '1'
config dhcp 'wan'
option interface 'wan'
option ignore '1'
config odhcpd 'odhcpd'
option maindhcp '0'
option leasefile '/tmp/hosts/odhcpd'
option leasetrigger '/usr/sbin/odhcpd-update'
option loglevel '4'
root@OpenWrt:~# cat /etc/config/firewall
config defaults
option syn_flood 1
option input REJECT
option output ACCEPT
option forward REJECT
# Uncomment this line to disable ipv6 rules
# option disable_ipv6 1
config zone
option name lan
list network 'lan'
option input ACCEPT
option output ACCEPT
option forward ACCEPT
config zone
option name wan
list network 'wan'
list network 'wan6'
option input REJECT
option output ACCEPT
option forward REJECT
option masq 1
option mtu_fix 1
config forwarding
option src lan
option dest wan
# We need to accept udp packets on port 68,
# see https://dev.openwrt.org/ticket/4108
config rule
option name Allow-DHCP-Renew
option src wan
option proto udp
option dest_port 68
option target ACCEPT
option family ipv4
# Allow IPv4 ping
config rule
option name Allow-Ping
option src wan
option proto icmp
option icmp_type echo-request
option family ipv4
option target ACCEPT
config rule
option name Allow-IGMP
option src wan
option proto igmp
option family ipv4
option target ACCEPT
# Allow DHCPv6 replies
# see https://github.com/openwrt/openwrt/issues/5066
config rule
option name Allow-DHCPv6
option src wan
option proto udp
option dest_port 546
option family ipv6
option target ACCEPT
config rule
option name Allow-MLD
option src wan
option proto icmp
option src_ip fe80::/10
list icmp_type '130/0'
list icmp_type '131/0'
list icmp_type '132/0'
list icmp_type '143/0'
option family ipv6
option target ACCEPT
# Allow essential incoming IPv6 ICMP traffic
config rule
option name Allow-ICMPv6-Input
option src wan
option proto icmp
list icmp_type echo-request
list icmp_type echo-reply
list icmp_type destination-unreachable
list icmp_type packet-too-big
list icmp_type time-exceeded
list icmp_type bad-header
list icmp_type unknown-header-type
list icmp_type router-solicitation
list icmp_type neighbour-solicitation
list icmp_type router-advertisement
list icmp_type neighbour-advertisement
option limit 1000/sec
option family ipv6
option target ACCEPT
# Allow essential forwarded IPv6 ICMP traffic
config rule
option name Allow-ICMPv6-Forward
option src wan
option dest *
option proto icmp
list icmp_type echo-request
list icmp_type echo-reply
list icmp_type destination-unreachable
list icmp_type packet-too-big
list icmp_type time-exceeded
list icmp_type bad-header
list icmp_type unknown-header-type
option limit 1000/sec
option family ipv6
option target ACCEPT
config rule
option name Allow-IPSec-ESP
option src wan
option dest lan
option proto esp
option target ACCEPT
config rule
option name Allow-ISAKMP
option src wan
option dest lan
option dest_port 500
option proto udp
option target ACCEPT
### EXAMPLE CONFIG SECTIONS
# do not allow a specific ip to access wan
#config rule
# option src lan
# option src_ip 192.168.45.2
# option dest wan
# option proto tcp
# option target REJECT
# block a specific mac on wan
#config rule
# option dest wan
# option src_mac 00:11:22:33:44:66
# option target REJECT
# block incoming ICMP traffic on a zone
#config rule
# option src lan
# option proto ICMP
# option target DROP
# port redirect port coming in on wan to lan
#config redirect
# option src wan
# option src_dport 80
# option dest lan
# option dest_ip 192.168.16.235
# option dest_port 80
# option proto tcp
# port redirect of remapped ssh port (22001) on wan
#config redirect
# option src wan
# option src_dport 22001
# option dest lan
# option dest_port 22
# option proto tcp
### FULL CONFIG SECTIONS
#config rule
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 80
# option dest wan
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
# option target REJECT
#config redirect
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 1024
# option src_dport 80
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
Did some testing with the default configuration as you suggested. When switching mode to 802.11N, the connectivity issues are gone, but so as higher bitrate... 
Use 40MHz channel width for the 2G radio.