WLAN 5 GHz band RT-N66U is restarting a few times when i use it much

[ries1971]

Hi All,

First, sorry for my bad English.

I have a problem for i while.

When i use the 5 GHz band of my RT-N66U for a moment when copiing or downloading it drops and is not visible for a while. After some time it's back.
I Use Merlin, version 378.56_2

Anybody having the same problem and can it be solved, ?

Log:

Nov 24 11:03:51 dnsmasq-dhcp[246]: DHCPREQUEST(br0) 192.168.0.53 10:a5:d0:32:ed:e7
Nov 24 11:03:51 dnsmasq-dhcp[246]: DHCPACK(br0) 192.168.0.53 10:a5:d0:32:ed:e7 android-4e889a9a086f72a3
Nov 24 11:40:53 dnsmasq-dhcp[246]: DHCPREQUEST(br0) 192.168.0.86 c8:f7:33:ac:8d:70
Nov 24 11:40:53 dnsmasq-dhcp[246]: DHCPACK(br0) 192.168.0.86 c8:f7:33:ac:8d:70 LaptopRies
Nov 24 11:42:22 rc_service: httpd 247:notify_rc restart_wireless
Nov 24 11:42:23 kernel: br0: port 2(eth1) entering disabled state
Nov 24 11:42:23 kernel: device eth1 left promiscuous mode
Nov 24 11:42:23 kernel: br0: port 2(eth1) entering disabled state
Nov 24 11:42:23 kernel: br0: port 3(eth2) entering disabled state
Nov 24 11:42:23 kernel: device eth2 left promiscuous mode
Nov 24 11:42:23 kernel: br0: port 3(eth2) entering disabled state
Nov 24 11:42:26 kernel: wl_module_init: passivemode set to 0x0
Nov 24 11:42:26 kernel: eth1: Broadcom BCM4331 802.11 Wireless Controller 6.30.163.2002 (r382208)
Nov 24 11:42:26 kernel: eth2: Broadcom BCM4331 802.11 Wireless Controller 6.30.163.2002 (r382208)
Nov 24 11:42:29 kernel: device eth1 entered promiscuous mode
Nov 24 11:42:29 kernel: br0: port 2(eth1) entering listening state
Nov 24 11:42:29 kernel: br0: port 2(eth1) entering learning state
Nov 24 11:42:29 kernel: br0: topology change detected, propagating
Nov 24 11:42:29 kernel: br0: port 2(eth1) entering forwarding state
Nov 24 11:42:29 kernel: device eth2 entered promiscuous mode
Nov 24 11:42:29 kernel: br0: port 3(eth2) entering listening state
Nov 24 11:42:29 kernel: br0: port 3(eth2) entering learning state
Nov 24 11:42:29 kernel: br0: topology change detected, propagating
Nov 24 11:42:29 kernel: br0: port 3(eth2) entering forwarding state
Nov 24 11:42:38 dnsmasq-dhcp[246]: DHCPREQUEST(br0) 192.168.0.86 c8:f7:33:ac:8d:70
Nov 24 11:42:38 dnsmasq-dhcp[246]: DHCPACK(br0) 192.168.0.86 c8:f7:33:ac:8d:70 LaptopRies
Nov 24 11:42:43 dnsmasq-dhcp[246]: DHCPREQUEST(br0) 192.168.0.53 10:a5:d0:32:ed:e7
Nov 24 11:42:43 dnsmasq-dhcp[246]: DHCPACK(br0) 192.168.0.53 10:a5:d0:32:ed:e7 android-4e889a9a086f72a3
Nov 24 11:43:14 dnsmasq-dhcp[246]: DHCPREQUEST(br0) 192.168.0.86 c8:f7:33:ac:8d:70
Nov 24 11:43:14 dnsmasq-dhcp[246]: DHCPACK(br0) 192.168.0.86 c8:f7:33:ac:8d:70 LaptopRies

I tried the original latest ASUS software but it has the same problem.

The Unit temp is 55 / 58 degrees Celcius = 131 / 136 degrees Fahrenheid

I hope sombody can help me with my problem.

Thanks
Greets
Richard

 

[wouterv]

Did you hard reset and manual configure the router after changing firmware versions?
If not do so, as follows:

1. Write down specific user configuration settings or make screen dumps.
2. Unplug any USB storage device from the router (if any).
3. Reboot the router (e.g. cycle its power).
4. Make a wired connection to the router.
5. Install the desired the router firmware.
6. Rever to factory defaults through the GUI.
7. Access the router at IP address 192.168.1.1 and Username/Password = admin/admin
8. Manual configure the router again.
9. Connect the USB storage device again (if any).

Although your router log doesn't show any evidence, you may be running in the 5 GHz DFS waiting time feature.
Follow this guideline for 5 GHz settings:
Use InSSIDer or a similar program to determine the usage of wireless channels in your neighborhood, do the check at various locations in your house. Do this check at least every month (new neighbor devices may have arrived or neighbors may have changed their settings).
Leave 5 GHz to Auto channel and set it to exclude DFS channels or set it to the least used channel out of 36, 40, 44 or 48 (the non DFS channels).

Google for DFS or look here:
https://en.wikipedia.org/wiki/List_of_WLAN_channels
DFS may cause 5 GHz to appear working intermittent due to the required waiting time.
Older firmware (and maybe the SDK5 driver) may not even include the DFS channels.