[FS#1060] Randomly loosing access to the router/wan via WLAN

LEDE Bugs lede-bugs at lists.infradead.org
Sun Oct 15 10:05:16 PDT 2017


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

User who did this - Krasimir Kostadinov (krasimir.k) 

Attached to Project - LEDE Project
Summary - Randomly loosing access to the router/wan via WLAN
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details - LEDE Info:
DISTRIB_ID='LEDE'
DISTRIB_RELEASE='17.01.3'
DISTRIB_REVISION='r3533-d0bf257c46'
DISTRIB_TARGET='ramips/rt3883'
DISTRIB_ARCH='mipsel_74kc'
The router was upgraded from openwrt 15.05.1.
Additionally installed packages : joe, luci-ssl, kmod-nf-nathelper-extra (for VPN pass through)

HW Info :
Asus RT-N56U v1.
Enabled 2.4GHz and 5GHz WLAN.
There is no USB device connected to the router.
The router is connected via 100MBit Ethernet cable to the ISP.
There are 8 connected devices to the router WiFi: mobiles, laptops, tablet and PC using Ubuntu/Win8/iOS/MacOS/AndroidOS.

The problem description:
Random loosing access to the WAN (no ping to 8.8.8.8 or any internet site) and to the router (ssh/ping 172.16.0.1) via the both 2.4/5GHz WLAN. However when the laptop is connected via router's switch, there is no problem to connect to the router or WAN. The problem can not be reproduced step by step. When Wifi is not working, connecting to the router via LAN does not show CPU hangup or memory shortage.

The router was with installed OpenWRT when the issue was appear for the first time. Upgrading to LEDE worked fine for 21 hours and after that the issue appears again.

Sometimes the issue appears several times per day, sometimes I do not have problems 1-2 days.

What I tried:
- Changed fixed channel to automatic and vice versa for 2.4 WLAN. Does not help. I thought that problem can be a the neighborhood WLAN's which used the same channel with me. even If I use channel not used from anyone, the problem again appears. 
- Disabled 2.4GHz WLAN only: Currently testing this configuration.

Problem workaround:
- After router's restart, the WLAN access is ok for a while.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1060



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