[FS#447] Unstable 2.4 GHz WiFi on WDR3600

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Daniel Wandrei (cyablo) 

Attached to Project - LEDE Project
Summary - Unstable 2.4 GHz WiFi on WDR3600
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - I'm using two TP-LINK WDR3600 (one per floor). After around 2 days the 2.4 GHz WiFi of the WDR on the ground floor starts to get unstable. Mobile devices don't get any data throughput, connection drops, clients are not able to connect to WiFi... till there is no client left connected and no new connections can be established. The Problem occurred just after I added a CPE210 which is WDS bridged (WDR3600 WDS AP, CPE210 WDS client) this particular WDR3600.

Both Devices are running latest Lede trunk, the Problem exist in every trunk Version since I added the CPE210 (about 4-5 Weeks). As soon as the WDR3600 gets unstable, the CPE210 starts spamming log entry's like:

Wed Feb  1 01:49:21 2017 kern.info kernel: [120752.942945] wlan0: authenticate with a0:f3:xx:xx:xx:xx
Wed Feb  1 01:49:21 2017 kern.info kernel: [120752.965502] wlan0: send auth to a0:f3:xx:xx:xx:xx (try 1/3)
Wed Feb  1 01:49:21 2017 kern.info kernel: [120753.074740] wlan0: send auth to a0:f3:xx:xx:xx:xx (try 2/3)
Wed Feb  1 01:49:21 2017 kern.info kernel: [120753.137152] wlan0: send auth to a0:f3:xx:xx:xx:xx (try 3/3)
Wed Feb  1 01:49:21 2017 kern.info kernel: [120753.236001] wlan0: authentication with a0:f3:xx:xx:xx:xx timed out

After a reboot of the WDR3600, everything is fine again for 1-3 Days, all clients reconnect and bridge is established.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=447