@Kevin_Z I have 2 log outputs where this happened though it seems I can only include one at a time here. Please do investigate :)

Thanks,

-David

@Kevin_Z It just happened again...my router is plugged into a UPS so it should not be related to dirty power. Here is another log

@ShotGal I have been experiencing this issue since I reset the Archer C7 Router. A search of this problem told me to remove the default name in the 'Host name' field on the Network settings page. This did not work. 

I am experiencing loss of connection every time the log shows the host lease name was not found.

My Archer C7 is a v1 by the way, updated with all the firmware updates after reset.

@ShotGal I likewise have the same issue with dropped connections with the same lease host name issue at the time of connection loss. It persists for upwards of 15 seconds in many cases, and then sometimes resolves on it's own, sometimes only with a disconnect/reconnect to the network. 

@ShotGal 

Hello guys, my router, an Archer C7 v.2, has been presenting the same problem. Sporadically, the 2.4 GHz and 5 GHz signals disappear completely, but the router continues to function, including via a wired network, which does not lose connection. My network is presented as follows: ISP Modem (LAN) (Router mode) > Ethernet network cable > TP Link Archer C7 v.2 Router (WAN). It is worth mentioning that my internet provider is Claro NET Virtua (Brazil), which uses DOCSIS 3.0 (HFC). I have a connection speed of 240 MB download and 20 MB upload. I also attached my log. I hope the team can solve the problem, because I tried everything possible: I used the most current firmware, I tried the factory reset, and the problem continued, I tried the firmware downgrade and a new factory reset, the problem continued, I tried to rename the SSID , changed the password, changed the encryption to a less robust version, changed the wifi channels, and nothing worked. I hope my speech helps in some way.

Have the same problem. Seems like Tp-Link just don't give a f... to this router anymore since the problem seems to persist for more than a year and no solution was given so far. 

Anyway, here's my log. 

@Kevin_Z Boa noite!

Possuo o mesmo problema, mais com roteador diferente. Tenho o TL-WR2543ND. na última atualização. 

Também já fiz de tudo, reset, atualizaões, mundanças de configurações e mesmo assim o problema perciste.

Estou enviando em anexo o log do aparelho para a sua analise. Fico no seu aguardo.

They never got back to me with any solution. I think it must have been a hardware issue since it doesnt seem any software solutions resolve it. If you find this trying to find a solution then I just recommend a new router.