@eclecticnetwork 

Hi Thank you for your response, this outage isn't  by the ISP, because I made the test that you suggest to me, having a computer conected direct to the ISP modem, and when the outage happen on AX21, the computer still have internet, before this AX21 I had the Archer C2 AC750, in that scenario if the ISP modem fails, the Archer C2 never shut down the wifi network, but in this case with the Archer AX21 AX1800, it reboot complete, the only logs that I can capture are as I added on the beginning of this report. By my understanding is, if you have a outage on the Ethernet WAN interface, the system must keep working, not make or apply a complete itself reboot. The other question here is, why this  reboot event is related with clear all traffic stats, and then reboot?

I already had  disable the auto reboot. 

I powerd off all wifi6 features. 

I already had disable the Internet IPv6

I already had disable the Qos

I already had disable Parental Controls

I already had disable the internet time NTP Service. 

All this ti lightened the work to this router, but is keep happening the same problem. For me as a customer, being pragmatic, this is  like some bug, because I have been reading this situation is happenings to other customers with other recent routers TP-Link models, the AX6000, AX3000, AX1800, AX1500. 

2021-03-22 00:33:27 Led Controller INFO [1088] Start to run WIFI5G_ON

2021-03-22 00:33:27 Led Controller INFO [1088] Start to run WIFI2G_ON

2021-03-21 22:56:06 Led Controller INFO [1088] Start to run WAN1_ON

2021-03-21 22:56:06 Led Controller INFO [1088] Start to run WAN0_OFF

2021-03-21 22:56:06 Led Controller INFO [1088] Start to run LAN_OFF

2021-03-21 22:55:21 Led Controller INFO [1088] Start to run WAN1_ON

2021-03-21 22:55:21 Led Controller INFO [1088] Start to run WAN0_OFF

2021-03-21 22:55:21 Led Controller INFO [1088] Start to run LAN_OFF

2021-03-21 22:55:10 Traffic Statistics INFO [8631] Clear all stats because time changed

@Kevin_Z  Thanks you for your reponse, I received a TP-Link email, it just notify the tp link engeniering dep  will be working on this issue. I hope they guive a soon reponse and solution to this inconsistencie behaivor of this routers. I ask that in any scenario the router don't reset by itself, witout any order or command by the user.

@ktsiang The NTP is not the problem, in my AX21 the NTP is still working as original, it doesn't have a new firmware update available, and I made the test with and without the NTP, that I observe is, if I disable all the wifi6 features, it work fine and stable, with wifi6 disable is not presented the restart by itself and there is no more the log of clean all the stat because time is changed. So this router have been sell as a wifi5 and wifi6 cable, and yes it do the wifi6 features, but the bug is that  it generate a lot of statistics errors because it have a problem with wifi5 and wifi6 working together, I have many wifi5 end point in my house almost 35 domotica devices, and just two wifi6 capable end points new iPhone12 and iPad Pro 2020, so this router can't perform well both versions of wifi5 and wifi6 together, it suppose can be,  but it is behave not reliable.

If I enable ifi5 and wifi6 features together it auto restart 3 o 4 times per day. 

if I just enable wifi5 and disable wifi6 features it work stable and it had more than 24 hour without auto restart. 

So this router can't work fine with wifi5 and wifi6 together, but I decide to purchase this model because this feature, wifi5 and wifi6 together without problems or any failure.

The statistics logs must be automatic overlapping, to avoid saturation in the memory. 

by any other reason the router must not auto restart. 

TP-Link please I ask you  fix this bug, I what the AX21 work with wifi5 features and wifi6 features together without any failure or auto restart as advertised.

+++++++++++++++++++++++++++++++++++++++++++++++++++++

Online Update

Update firmware over the internet.

Firmware Version:

1.2.1 Build 20201202 rel.76564(5553)

Hardware Version:

Archer AX21 v1.20

Firmware is up to date.

+++++++++++++++++++++++++++++++++++++++++++++++++++++

OFDMA Disable

TWT Disable

Smart Connect Disable. 

Amazon Wi-Fi Simple Setup: Disable. 

QoS Disable

NTP: Not entries

ALG: All Enable. 

Internet IPV6: Disable.

OneMesh: Disable. 

+++++++++++++++++++++++++++++++++++++++++++++++++++++

This are the last logs it generated, since the last auto restart, and before wifi6 features was disable. 

2021-03-22 20:38:57 QoS INFO [31141] Service start

2021-03-22 20:38:57 Parental Controls INFO [31142] Service start

2021-03-22 20:38:57 Parental Controls INFO [31142] Function enabled

2021-03-22 20:38:57 Parental Controls INFO [31142] Service stop

2021-03-22 20:38:57 Parental Controls INFO [31142] Function disabled

2021-03-22 20:38:57 QoS INFO [31141] Function disabled

2021-03-22 20:38:57 QoS INFO [31141] Service stop

2021-03-22 00:44:12 QoS INFO [19868] Service start

2021-03-22 00:44:12 Parental Controls INFO [19869] Service start

2021-03-22 00:44:12 Parental Controls INFO [19869] Function enabled

2021-03-22 00:44:12 Parental Controls INFO [19869] Service stop

2021-03-22 00:44:12 Parental Controls INFO [19869] Function disabled

2021-03-22 00:44:12 QoS INFO [19868] Function disabled

2021-03-22 00:44:12 QoS INFO [19868] Service stop

2021-03-22 00:43:51 QoS INFO [18979] Service start

2021-03-22 00:43:51 Parental Controls INFO [18978] Service start

2021-03-22 00:43:51 Parental Controls INFO [18978] Function enabled

2021-03-22 00:43:51 Parental Controls INFO [18978] Service stop

2021-03-22 00:43:51 Parental Controls INFO [18978] Function disabled

2021-03-22 00:43:51 QoS INFO [18979] Function disabled

2021-03-22 00:43:51 QoS INFO [18979] Service stop

2021-03-22 00:43:24 QoS INFO [18048] Service start

2021-03-22 00:43:24 Parental Controls INFO [18047] Service start

2021-03-22 00:43:24 Parental Controls INFO [18047] Function enabled

2021-03-22 00:43:24 Parental Controls INFO [18047] Service stop

2021-03-22 00:43:24 Parental Controls INFO [18047] Function disabled

2021-03-22 00:43:24 QoS INFO [18048] Function disabled

2021-03-22 00:43:24 QoS INFO [18048] Service stop

2021-03-22 00:33:35 IP & MAC Binding INFO [1067] Daemon connection succeeded

2021-03-22 00:33:35 IP & MAC Binding INFO [1067] ARP Binding disabled

2021-03-22 00:33:35 IP & MAC Binding INFO [1067] Config interface initialization succeeded

2021-03-22 00:33:35 IP & MAC Binding INFO [1067] Initialization succeeded

2021-03-22 00:33:27 Led Controller INFO [1088] Start to run WIFI5G_ON

2021-03-22 00:33:27 Led Controller INFO [1088] Start to run WIFI2G_ON

2021-03-21 22:56:06 Led Controller INFO [1088] Start to run WAN1_ON

2021-03-21 22:56:06 Led Controller INFO [1088] Start to run WAN0_OFF

2021-03-21 22:56:06 Led Controller INFO [1088] Start to run LAN_OFF

2021-03-21 22:55:21 Led Controller INFO [1088] Start to run WAN1_ON

2021-03-21 22:55:21 Led Controller INFO [1088] Start to run WAN0_OFF

2021-03-21 22:55:21 Led Controller INFO [1088] Start to run LAN_OFF

2021-03-21 22:55:10 Traffic Statistics INFO [8631] Clear all stats because time changed

2020-12-02 00:00:52 Led Controller INFO [1088] Start to run WAN1_OFF

2020-12-02 00:00:52 Led Controller INFO [1088] Start to run WAN0_ON

2020-12-02 00:00:52 Led Controller INFO [1088] Start to run LAN_OFF

Just to notify, I made the test let enable just wifi6 features using just my 2 wifi6 end point deivces, not the others older, without wifi5, and it manifest the same failure, the log clear all stats because time is changed, and the system reboot by itself.

@eclecticnetwork  

TP-LINK : 

Dear Customer,

This is Ives from TP-Link support center to help you with your problem.

The automatic reboot issue may be caused by some specific clients, could you please tell us all wired and wireless clients connected to the router? If you disconnect all clients, will the router still reboot automatically?

Are you using the power adapter that came with your router?

Could you please log in to the web interface of the AX21(tplinkwifi.net), and go to "Advanced" > "Wireless" > "Wireless Settings", then change the transmit power of 2.4G and 5G Wi-Fi to "Middle"?

Please observe whether the AX21 will auto-reboot after that.

​We look forward to hearing back from you. If you have additional information or feedback to provide, please let us know.

Best Regards！

My answer to TP_LINK: 

Hi thank you for your response, all the information you request is explained on the thread, I have just two wifi6 devices, just this this two the route suddenly reset, by my understanding and requirements, I want a router that don’t kept reset often or every time so often.

And I explained too, if I disable all the wifi6 features, and just the wifi5 is enable, it works very stable, and don’t reset, so that I look here, I suspect that this router is not capable to handle both standards, wifi6 and wifi5 together or at the same time.

I have  25 demotic end points, in wifi5, 5 wifi camaras, 12 wifi lights, 3 wifi switches, 5 wifi thermostats, 3 display tvs, apple tv, 2 windows 10 pcs, 1 network player for music. iPhone 12, and iPad pro 2020, all this working fine with wifi5, but if I want to have the wifi6 features, at least for the only 2 wifi6 devices capable that I have, witch are iPhone 12 and iPad pro 2020, the router reset every time so often, and I want that the router works fine with this scenario because as tp-link advertised.

Since I configures just with traditional wifi5 mode, the router has almost 3 days without any restart and working fine, but I don’t have the amenities of wifi6 in the iPhone 12 and iPad pro 2020.

Please fix it as soon.

2021-03-24 11:17:59 Led Controller ERROR [1088] Config importing failed

2021-03-24 11:17:59 Led Controller DEBUG [1088] Failed to read USB3        You advertise this router has USB2, but in reality is USB3.

NO RESTART PERIOD AND KEEP WORKING FINE IN WIFI5 MODE

2021-03-22 00:33:27 Led Controller INFO [1088] Start to run WIFI5G_ON      WIFI 6 MODE FAILS.

2021-03-22 00:33:27 Led Controller INFO [1088] Start to run WIFI2G_ON

2021-03-21 22:56:06 Led Controller INFO [1088] Start to run WAN1_ON

2021-03-21 22:56:06 Led Controller INFO [1088] Start to run WAN0_OFF

2021-03-21 22:56:06 Led Controller INFO [1088] Start to run LAN_OFF

2021-03-21 22:55:21 Led Controller INFO [1088] Start to run WAN1_ON

2021-03-21 22:55:21 Led Controller INFO [1088] Start to run WAN0_OFF

2021-03-21 22:55:21 Led Controller INFO [1088] Start to run LAN_OFF

2020-12-02 00:00:52 Led Controller INFO [1088] Start to run WAN1_OFF

2020-12-02 00:00:52 Led Controller INFO [1088] Start to run WAN0_ON

Middle with wifi5 and wifi6 together? or just wifi6 devices?  it suppoouse that you have a laboratory where you can probe many scenarios, I can do that you requiest to me on this last response, but I want that you guive us the root cause and the fix, not to  ask to the customer test again and again, yo can guive to the customer the right configuration as an effective solution, istead not ask to the customer test and more test just to see what happend. Pleas send us the root cause and the effective fix. The router must not restart by itsell, where other older router by the same brand is stable.