RT-AC88U Hangs

[murat göttendelik]

Hi,

Sometimes, my AC88U router GUI does not respond to web requests (Administration)
This situation is not resolved until I restart the router manually from the switch.

During the problem, the GUI is not accessible from LAN or WAN, however, access to/from internet is not cut down.
So, all LAN clients can access WAN, and from WAN I can reach my LAN server. But I can not reach the router GUI.
Today it occured right after I accessed the GUI. before my access was cut, I saw the usage on CPU core 1 as 100%
So I assume it is some high load on CPU.
How can I troubleshoot this further ?

ps. I am using Asus WRT Merlin firmware with latest release.

Thanks.

 

[yk101]

I had the same issue a few revs back with 88U as well. Wound up resetting to factory and re-configuring the router from scratch. That fixed the problem for me...

 

[murat göttendelik]

reconfiguring the router is not a problem if I didn't have so many DHCP reservations (40)
is there a way to export/import them ?

btw, I'd prefer finding the root cause instead of resetting everything.
is there any way to further troubleshoot ?

 

[Martineau]

reconfiguring the router is not a problem if I didn't have so many DHCP reservations (40)
is there a way to export/import them ?

Here is one method

btw, I'd prefer finding the root cause instead of resetting everything.
is there any way to further troubleshoot ?

When the router GUI is not available, can you SSH into the router ….if you can then check for anything unusual in Syslog... i.e. is the http server running? if not (or even if it is) then try restarting the http server?

service restart_httpd

​

 

[mekabe remain]

I've read in another thread that this is a known problem and that we could access router GUI , giving the command on SSH: "service restart_httpd"

This solution really works.

after that I can access the GUI. However, the CPU is still 100% and these functions can not work:
- reboot from GUI
- change SSH access to "LAN & WAN" from "LAN Only" -> This results in losing also LAN SSH access
- use Alexa command to reboot

So, even I could access from GUI after restarting HTTPD , I was not able to use my router.

What else should I do to further analyze ?

 

[mekabe remain]

Here is one method

That's a good one. What else can I get from nvram to save ?
what other lists are available ? is there a way to get list/config names ?