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Asus RT-AC86U shutting down at night?

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PULCK

Occasional Visitor
I recently installed an RT-AC86U (following recommendations in another thread) and it has been working great. Except... a few times in the last couple of weeks my internet has gone down in the middle of the night. I know this because my burglar alarm (which is reliant on a wifi connection) has emailed me to say that it was offline for a few hours in the night.

How can I check if my router is the culprit? When I look at the syslog around the time of the outage, what should I be looking for? I don't see anything as simple as "shutdown" in it. And
 
No, latest Merlin.
I had the same problem. I think there’s a memory leak in Merlin’s build. I noticed the memory usage gradually rising and after 5 to 7 days the router would reboot. I switched to stock with the same exact setup and have an uptime of 20+ days now.
 
I recently installed an RT-AC86U (following recommendations in another thread) and it has been working great. Except... a few times in the last couple of weeks my internet has gone down in the middle of the night. I know this because my burglar alarm (which is reliant on a wifi connection) has emailed me to say that it was offline for a few hours in the night.

How can I check if my router is the culprit? When I look at the syslog around the time of the outage, what should I be looking for? I don't see anything as simple as "shutdown" in it. And

When the router reboots it has not got the right time from the NTP server, so look for a date change (May 5 in my case) in syslog. If you can't find any date change in the logs the router has not rebooted.
 
I had the same problem. I think there’s a memory leak in Merlin’s build. I noticed the memory usage gradually rising and after 5 to 7 days the router would reboot. I switched to stock with the same exact setup and have an uptime of 20+ days now.
Unfortunately, I need to use Merlin for the ability to set Option 61.
 
When the router reboots it has not got the right time from the NTP server, so look for a date change (May 5 in my case) in syslog. If you can't find any date change in the logs the router has not rebooted.
I don't see any date change, so perhaps it's not my router. However, I did notice it was set to the wrong region (Greenwich Meantime instead of Greenwich Meantime London).

The culprit could be my modem - Draytek Vigor 130. Annoyingly, because it's in bridge mode, I cannot access its web interface - a serious shortcoming of this model.
 

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