@Ivaylo I have tried the previously released version Archer C6(EU)_V2_20090 as well as the beta version For Archer C6EU V2: https://static.tp-link.com/2020/202010/20201030/ArcherC6v2_eu-up-ver1-3-6-P1[20201030-rel60104].zip and have experienced much fewer network crashes but they do still happen. 

Also, I have performed a factory reset after installing each version.

 

Is it safe to consider that at this point this might be a hardware issue? 

I know it's has been a while but the problem still persists, although now I can easily fix it by rebooting the router. For some reason, all devices connected to the 2.4G connection lose internet connection and cannot reconnect automatically or manually unless I reboot the router.

@Kevin_Z 

 

Hello, 

The 2.4G network is visible and my devices usually give the " Unable to connect to the network" error. Once my iPhone was unable to connect and the error mentioned to check the DHCP setting but I cannot recall the exact error message. 

 

 I have two light strips, two light bulbs, and two Echo Dots also some smart panels from Nanoleaf. So that comes to about 10-12 devices.

 

Edit: The devices disconnect at least once every 24 Hrs but it's pretty random. They do remain connected for some time after rebooting but not more than 6-8 hours

 

Here are some snips:

@Kevin_Z

Losing WAN connection regularily (5-20x a day I run into it, I suppose it happens more often).

When connected to ISP modem directly no disconnects happen.

 

Hardware: Archer C6(EU) v2.0
Firmware Version: Latest official: 1.3.6 Build 20200902 rel.65591(4555)

 

My PC is connected via ethernet cable, as well as a HP printer and two Raspberry Pi's.
One TP-Link Tapo C100, an iPhone, an iPad and two Sonos Wireless Speakers are connected via 2.4 GHz and 5 GHz Wifi.
No Guest-Wifi, no QoS, no Parental Controls, SPI firewall active (default setting), NAT forwarding: 4 virtual server rules active, OpenVPN VPN-Server active

 

I already did a factory reset, nothing changed.

 

I see that for the US-Version of the router there is an update available (Archer C6(US)_V2_210226 - https://www.tp-link.com/us/support/download/archer-c6/#Firmware ) that has a description like "Fixed the bug that unstable WAN connection under certain circumstances".

Can you please, please, also fix that issue for the EU-version?

 

This is becoming very annoying for me and happening more and more often.

Attached you will find a ping result file. I "masked" my IP-Addresses for security reasons.
You will still see the behaviour.

Also attached you find a screenshot of my router's webpage when the error occurs.

 

I ran a second computer straight from the ISP modem from its second eth-port. There I had _no_ lost connection over the whole time period when I was monitoring on this second computer.

 

In the near future I want to expand with a RE300 mesh-repeater that was recommended to my by your support. I already bought it. So deactivating mesh is no solution to me (in case this is the issue). Since the US-Version has an update it should also be possible for the EU-Version, right?

 

I don't want to put OpenWRT firmware on it and also not throw it in the bin, since I like the router very much as it is except this bug.

Thank you for your help.