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[pnwbob]

I'm experiencing the same issue with my 860L. However the time between reboots for me is generally on the order of weeks. I don't think it is related to settings since it works flawlessly for weeks and then none of the 2.4GHz devices can connect. The 5GHz wifi doesn't exhibit any of the issues. When I check to see why the connection failed on my Android phone it shows "Authentication error occurred".
I have slowly changed the options in the wireless settings one at a time and it never works until I physically reboot the router.
To test if it is interference I've left it running without rebooting to see if I can connect for 24 hours and I still get the authentication error.

My firmware version is:
1.08 Mon 03 Mar 2014

I don't believe there is anything more current.

  -Bob

[FurryNutz]

Link>Welcome!

• What region are you located?
• Has a Factory Reset been performed?
• Was a Factory Reset performed before and after any firmware updates then set up from scratch?

>FW Update Process

• Was the router working before any firmware updates?

Internet Service Provider and Modem Configurations

• What ISP Service do you have? Cable or DSL?
• What ISP Modem Mfr. and model # do you have?

Wireless Configurations
Links>Wireless Installation Considerations and Managing Signal Congestion and Good Neighbour Policy

• Ensure the default (dlink) SSID name is changed. Can be anything and not something that's already in use by any neighboring WiFi routers. Under Setup/Wireless/Manual.
• What wireless modes are you using?
• 2.4Ghz and 5Ghz routers: Try single mode G or N or mixed G and N on 2.4Ghz and single mode N or AC on 5Ghz?
• Channel Width set for Auto 20/40Mhz or try 20Mhz only.
• Try setting a manual Channel to a open or unused channel. 1, 6 or 11. 11 for single mode N if the channel is clear. 13 for EU regions. Try channel 48 or 149 on 5Ghz.
• What security mode are you using? Preferred security is WPA-Personal. WPA2/AES Only. Some WiFi adapters don't support AES, so you might want to try TPIK only or Auto TPIK and AES.
• What wireless devices do you have connected?
• Ensure any devices with WiFi adapter drivers are updated.
• Any 2.4Ghz or 5Ghz cordless house phones or WiFi APs near by that maybe causing interferences?
• Any other WiFi routers in the area that maybe causing interferences? Link> Use InSSIDer to find out. How many? Use v3, its free.
• If you have any of these options, Try turning OFF or ON Short GI, WLAN Partition, Extra Wireless Protection and HT 20/40 Co-existence if you have it. Also testing with HT20/40Mhz Co-existence enabled will impact results as well. I prefer to use this option OFF. Recommended settings are default. Under Advanced/Advanced Wireless.

Router Placement
Forum User - "Well I feel really dumb. After moving the router away from other electronic devices my speeds are back to normal. Just a heads up for anyone experiencing slow speeds, you might want to move it away from other electronics and see if that helps."
3-6' feet minimum safe distance between devices.
Placement on main level floor and central in the building and WELL ventilated is preferred. Not in basements or closets as building materials, or near by electronics devices could interfere or hinder good signal propagation.
http://www.smallnetbuilder.com/wireless/wireless-basics/31083-smallnetbuilders-wireless-faq-the-essentials

[FurryNutz]

Any status on this? 

I'm experiencing the same issue with my 860L. However the time between reboots for me is generally on the order of weeks. I don't think it is related to settings since it works flawlessly for weeks and then none of the 2.4GHz devices can connect. The 5GHz wifi doesn't exhibit any of the issues. When I check to see why the connection failed on my Android phone it shows "Authentication error occurred".
I have slowly changed the options in the wireless settings one at a time and it never works until I physically reboot the router.
To test if it is interference I've left it running without rebooting to see if I can connect for 24 hours and I still get the authentication error.

My firmware version is:
1.08 Mon 03 Mar 2014

I don't believe there is anything more current.

  -Bob