WNDR3700v4 Wireless Dropouts *UPDATE*

[whataboutnow]

further to my earlier post, my wireless has dropped out again but this time i have logs...

additional information:

had the same prob on 1.10, recenly upgraded to 1.12 Was sleeping for a few hours and when i woke up none of my wireless devices had a connection. when it disconnects the wlan is not visable on any devices for approx 5 minutes. It then becomes visable but attempting to connect does
nothing until i reboot the router. I'm using 2.4Ghz and the light remains green on the router. I still have WAN connection as my ddns client is updating fine and i can connect to the routers VPN server, login and reboot the router which restores the wireless connectivity.

My devices (4 wireless and 1 Wired) are occasionally re-requesting DHCP, like this:

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Sat Apr 11 13:14:09 2020 daemon.info dnsmasq-dhcp[3327]: DHCPREQUEST(br-lan) 192.168.1.23 2e:87:12:cf:27:89

Also, I occasionally get this warning:

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at Apr 11 13:56:18 2020 daemon.warn dnsmasq[3327]: possible DNS-rebind attack detected: 

My dns client is configured in the router to check update every 20 mins and force update every 3 days.

I think this might be when the WLAN connection dropped:

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Sat Apr 11 15:45:48 2020 daemon.notice hostapd: wlan0: AP-STA-DISCONNECTED 58:04:54:d0:e5:c9
Sat Apr 11 15:45:48 2020 daemon.info hostapd: wlan0: STA 58:04:54:d0:e5:c9 IEEE 802.11: disassociated due to inactivity
Sat Apr 11 15:45:49 2020 daemon.info hostapd: wlan0: STA 58:04:54:d0:e5:c9 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
Sat Apr 11 15:45:59 2020 daemon.notice hostapd: wlan0: AP-STA-DISCONNECTED a0:4e:a7:95:15:c2
Sat Apr 11 15:45:59 2020 daemon.info hostapd: wlan0: STA a0:4e:a7:95:15:c2 IEEE 802.11: disassociated due to inactivity
Sat Apr 11 15:46:00 2020 daemon.notice hostapd: wlan0: AP-STA-DISCONNECTED 2e:87:12:cf:27:89
Sat Apr 11 15:46:00 2020 daemon.info hostapd: wlan0: STA 2e:87:12:cf:27:89 IEEE 802.11: disassociated due to inactivity
Sat Apr 11 15:46:00 2020 daemon.info hostapd: wlan0: STA a0:4e:a7:95:15:c2 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
Sat Apr 11 15:46:01 2020 daemon.info hostapd: wlan0: STA 2e:87:12:cf:27:89 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)

I'd be very grateful for any help as this is really frustrating now. hopefully i'll be awake the next time it drops and can provide the log from immediately before and afterwards.

many thanks

full log dump incase it's useful, i got this when i logged in via VPN to reboot: tried to attach .rar but it hasn't shown up so i've clouded it. https://bit.ly/2RuXW4J

[ispyisail]

At some point you will need to do a fresh router reset.

Its a pain in the butt but fixes 50% of all problems (In my opinion)

Don't use a backup file or preserve settings

[RomanHK]

If you often disconnect the WiFi client due to no activity, you need to set the client "power save" - this will increase the battery consumption. It varies on each system and sometimes it is necessary to use the application.

[whataboutnow]

At some point you will need to do a fresh router reset.

Its a pain in the butt but fixes 50% of all problems (In my opinion)

Don't use a backup file or preserve settings

Thanks for the reply - the config was a clean install done only hours earlier.
I had set up the following things, in this order:

Dark One theme
DDNS (check interval 20mins, forced update 3days)
VPN server
Port Forwards
Enforced DHCP address (select hostname/MAC from currently connected hosts)
Logread for Gargoyle plugin from plugins page.

I have reset again and have only reconfigured:

DDNS
OpenVPN Server
One Dark Theme
Removed all but 2 single port forwards
Set static IP's on my devices rather than the router DHCP page
Logread for Gargoyle Plugin.


WLAN has stayed up for now, I will update with further info if it drops again.

Many thanks

[whataboutnow]

If you often disconnect the WiFi client due to no activity, you need to set the client "power save" - this will increase the battery consumption. It varies on each system and sometimes it is necessary to use the application.

Sorry do you mean on my actual devices like "allow this device to turn off this device to save power", in network properties? I have that disabled on my windows machine as I also use Wake On LAN. My other devices are android and are set to keep WiFi active.

If that's not what you meant, I'm sorry about that, could you please give me any more information?

Many Thanks

[Lantis]

Enforced DHCP address (select hostname/MAC from currently connected hosts)

will probably give you the most problems.

[RomanHK]

Look at the router via ssh in the /etc/config/wireless file and change the value (if there is no value, add a line):

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option disassoc_low_ack '0'

https://forum.openwrt.org/t/solved-deau ... onds/16294

Maybe it helps.

[whataboutnow]

Yeah I thought the enforced DHCP might be problematic so I have manually configured the addresses in each of my devices and removed them from the DHCP settings page. I have also checked for option disassoc_low_ack '0' which was already present. I will be monitoring for any further dropouts and will update if any occur.

Thanks again

[whataboutnow]

Hello

OK so I'm no further forward with this
Fresh install of 1.12 and still getting wireless dropouts,
I can restart it by issuing the command "wifi up" and it returns to normal but it's becoming a bit of a pain if I am not at home.

Is there anything else I can provide you with apart from my logs that would be of any use for diagnostics?

I think if it continues, I might go back to 1.10 and see if it still occurs
I can then determine if its my hardware (possible) or part of the 1.12 firmware (maybe). I I'm really starting to think it might be the firmware as this didn't occur at all before I upgraded.

Thanks for the time and effort

[ektus]

You could install the ping watchdog and use it to automatically restart wifi in case the router detects loss of connection to a wifi peer.