RT-AC68U dropped connection

[ZenitH-AT]

I recently put my RT-AC68U router to factory settings (after having almost bricked the thing) and applied some static addresses, port forwarding, renamed some devices, enabled qos and monitoring, etc (the usual basic stuff).

Now, the thing decided to drop for abour 2 minutes (couldn't ping gateway).

Here are the logs that seemed relevant

It's annoying if I am playing a multiplayer game and may point to a bigger issue. Can anyone make sense of this?

 

[ColinTaylor]

This seems to be the same problem as reported in your other thread: https://www.snbforums.com/threads/r...nce-updating-to-newest-merlin-firmware.47960/

It would be useful to see more of the log file before it restarted. It looks there might have been a kernel crash.

Unless you have reason to think this is something different it's best not to create new threads for the same problem.

 

[ZenitH-AT]

It is a different issue. The first one seemed to be related to the power supply, as all the lights turned off. This situation is much less frequent and doesn't require me to restart the device to regain connection (and the lights all stay on). keeping a ping -t going confirms that it fails to connect to the gateway for about 2 minutes then goes back to normal.

 

[ColinTaylor]

Yes, you can see in the log what appears to be a kernel fault followed by a 2 minute gap whilst the router reboots and then the log starts again.

So we'd need to see more of the syslog before the reboot.

 

[ZenitH-AT]

Sorry for the late reply. Here is the log: https://pastebin.com/amxYAyhf

 

[ColinTaylor]

Most of the restarts appear to because of this event: "notify_rc restart_wrs". I think that's something to do the with the AiProtection signature updates. Have you installed anything on the router that might interfere with that process, like ad-blockers etc?

There were at least 8 of these restarts on the 29th. When these happened did the router come back up by itself or was it you turning it off and on again?

 

[ZenitH-AT]

I am not running any adblocker scripts on the router but I'm sure people using the wifi may be, on their own devices.

I may have tried restarting it myself but some I think were on their own.

 

[ColinTaylor]

I may have tried restarting it myself but some I think were on their own.

I'm seeing restarts at:

00:09:55
00:25:37
00:38:04
01:30:18
13:37:06
14:52:05
15:14:52
15:25:23

Do these coincide with anything you can think of? Seems a bit strange there's no log entries between 01:30 and 13:35.

If I were you I would try turning off every router feature that isn't essential, so that's QoS, AiProtection, etc. If it still happens I'd install a John's fork firmware which is known to be rock solid. If it happens after that then it's a hardware issue.

 

[ZenitH-AT]

Ill check out the fork. The reason why it didn't restart then was because I left it alone, but it wasn't working. If it restarts on its own, after a while only the 5GHz light comes on (but doesn't show up, there is no connection to the router at all).

I read about disabling QoS on another thread so I'll try that. I have it on adaptive at the moment and I think I repositioned streaming above browsing.

 

[ZenitH-AT]

I disabled QoS and traffic monitoring, AiProtection was already off. It lasted about 3 hours then disconnected again. Still have to try the fork. It could be a hardware issue, though...

 

[Grisu]

changeing power adapter often solves such issues.

 

[ZenitH-AT]

I had a simmilar issue before actually where the router kept restarting, among other small issues. I fixed that with a different adapter. But I think this is probably a really bad quality one, because it had a faulty adapter and these connection drops. No overheating issues though. I do notice high cpu usage sometimes. I think i'm going to replace it.