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Curious and irratic behaviour after power outage on Asus AX86U with merlin

torstein

Senior Member
TL;DR:
After cutting all power to the house due to electrical work needing to be done, the AX86Us (plural) got completely confused, forgot their SSIDs, presented both default ASUS_18 SSIDs and the old ones at the same time, but remembered the custom login info for both ssids somehow, threw me out of the webui multiple times, presented Asus' default "Create a new network" wizard, and then suddenly discarded that and remembered my original settings, just to forget them again. The routers, especially the main one, acted like they had schizofrenia or something. Why did this happen? I have cut the power before without any problem. Granted, the routers have exhibited weird behaviour before, requiring setting up as new.

Longer story.
So I had to turn off the power fuse to the entire house due to some electrical work needing to be done. It was off for perhaps one hour straight. When turned back on again, my network was gone, and instead of showing my SSID, it only showed the default ssid ASUS_18 from the main router. The AP seemed to be down completely. I connected to ASUS_18, and somehow it remembered my login info (non-default username and password) which is weird I think, considering it had seemingly factory reset itself. The webui looked wonky, but after three refreshes in the browser, it presented as normal, just to throw me back out to the login-screen. I logged back on again, was immediately thrown out again, and then it refused another login due to the "only one user can be logged in at a time". What??? But you logged me out, Asus, so who's logged in then? I waited 5 minutes, and log back in to ASUS_18, but now im on the Access point for some reason and somehow, and not the main router. WHAT?? I log out, cut the power to the routers, wait for them to reboot, choose ASUS_18 again, and now im in the main router. Same login and password. Whatever. I poke around in the webui to figure out whats going on, get kicked out again, and now im presented with the default Asus "Set up your network" wizard. Fine, I fill it out, but now it wont remember my newly made login info (same as it always have been, didnt want to change it) I try it multiple times including the default ones. Nothing works, and the router locks down with a 5 minute countdown timer due to unsuccessful login attempts. I hard reset the main router, and the above still happens. Three hard resets had to be done consequently before a final software factory reset in the webui fixed everything, seemingly. I did the same with the AP. Tried restoring from a backup from november 2024, but the router was confused again and presented TWO SSIDS, both Asus_18 and my custom SSID at the same time. And the weird thing is, both SSIDS worked, and could be connected to and logged in to the webui with. WHAT ON EARTH IS GOING ON???? I finally caved, factory reset everything and set everything up as new. It works now, but what the hell?? The whole ordeal took about three hours of pure frustration and perplexion.

I find my self in weird situations like this (not as bad as this one though) with Asus. I'm not blaming merlin firmware, but I have only every used it with merlin, so cant speak for the vendor firmware. It makes me lose trust and faith in the router brand as something I can rely on to always work. Home networks should, ones as simple as mine, be set-it-and-forget-it. Maybe its because I have scripts running such as YazFi for IoT, ethernet backhaul to an AP, NextDNS-cli, and are running the stock Wireguard server? Perhaps this is too much for the router to handle consistently and reliably, but it makes me wonder if perhaps I should be looking at more serious prosumer hardware.

If you guys have any advice other than Ubiquity (the alternative needs to be NextDNS compatible on the router level and offer vlan and vpn-server) that are serious about reliability and stableness and wont throw up weird behavior like this i'm all ears.

What's your experience with Asus, is it always reliable? Or have you ever had similar experiences to mine? Why did these series of eventshappen exactly, from a technical point of view? What was corrupted in the software?
 
Last edited:
Put your router on a UPS (it will confirm proper Earth grounding) to protect it from bad power events, and always perform a controlled shutdown whenever possible and you will most likely avoid unfortunate experiences like this in the future.... crashing computers is never a good thing.

OE
 
Power surges can do strange things. That said as mentioned get a UPS for your network equipment or power it down before hand.
 

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