386.4: AC86U losing 2.4 GHz devices

XIII

Very Senior Member
The last couple of days my RT-AC86U running Asuswrt-Merlin 386.4 is losing some/all devices on the 2.4 GHz band (on both the regular and all three 2.4 GHz guest networks); devices on the 5 GHz band are fine (wired as well).

Restarting the wireless service (service restart_wireless) does not help, nor does deauthenticating/deauthorizing. Only a reboot of the router brings those 2.4 GHz devices back online.

Anyone else experiencing this? Any better workarounds than rebooting the router?

(Examples of such devices: Raspberry Pi Zero W, Athom Homey, Philips Somneo wake-up light, LaMetric Time clock - the last one less than 2m away from the router)
 

bennor

Senior Member
Anyone else experiencing this? Any better workarounds than rebooting the router?
Yes people are experiencing Wifi disconnection issues with the 386.4 firmware across a number of Asus routers. A search, if you haven't done one, will yield a number of posts and threads. Some have their issues confined to specific IoT devices, some have it confined to one WiFi band or the other, others have problems across all their WiFi bands. There doesn't seem to be a one size fits all solution beyond doing a basic troubleshooting step of a hard reset and reconfiguring to see if the issue persists. Others solved their problem by rolling back to the 386.3_2 firmware. For example one past discussion:

https://www.snbforums.com/threads/2-4-ghz-frequent-disconnects-with-tp-link-and-honeywell.76764/
 

XIII

Very Senior Member
The TP-Link issue is the one I remembered from the (now closed) 386.4 thread, but that seemed to be specific to those devices.

(That's why I listed the devices that I use)
 

bennor

Senior Member
The TP-Link issue is the one I remembered from the (now closed) 386.4 thread, but that seemed to be specific to those devices.

(That's why I listed the devices that I use)
See post #6 in that above thread where a person talks about issues with their AC86U device.

https://www.snbforums.com/threads/2...-with-tp-link-and-honeywell.76764/post-738893

And the following post (#7) in that thread also appears to be another person with AC86U router that is having wireless issues.
 

heywire

Regular Contributor
There are several more threads. For example:

As you can see, these kinds of issues go way back.

Personally, I'm extremely frustrated by this striking lack of QC. Bought an AC86U to run the internet in my apartment complex thinking this was a true and tested model like the AC68U.

After borrowing another AC86U unit, flashing back and forth both official and Merlin firmware two versions back, I'm getting constant micro-disconnections on devices with with medium-low signal strenght on 5ghz jumping back and forth between 2.4 and 5ghz - even on official firmware. On Merlin firmware it happens even with devices in the same room as the router. Sometimes it worsens to the point that you cannot stream a tv show without being interrupted every 10-15 minutes. Completely untenable and unacceptable.

Jan 25 17:01:30 wlceventd: wlceventd_proc_event(527): wl0.1: Auth 62:07.. [MAC-address], status: Successful (0), rssi:0
Jan 25 17:01:31 wlceventd: wlceventd_proc_event(527): wl0.1: Auth 62:07.. [MAC-address], status: Successful (0), rssi:0
Jan 25 17:01:31 wlceventd: wlceventd_proc_event(527): wl0.1: Auth 62:07.. [MAC-address], status: Successful (0), rssi:0
Jan 25 17:01:31 wlceventd: wlceventd_proc_event(527): wl0.1: Auth 62:07.. [MAC-address], status: Successful (0), rssi:0
Jan 25 17:01:32 wlceventd: wlceventd_proc_event(527): wl0.1: Auth 62:07.. [MAC-address], status: Successful (0), rssi:0
Jan 25 17:01:35 wlceventd: wlceventd_proc_event(508): wl1.1: Disassoc 62:07.. [MAC-address], status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8), rssi:0
Jan 25 17:01:35 wlceventd: wlceventd_proc_event(527): wl1.1: Auth 62:07.. [MAC-address], status: Successful (0), rssi:0
Jan 25 17:01:35 wlceventd: wlceventd_proc_event(537): wl1.1: ReAssoc 62:07.. [MAC-address], status: Successful (0), rssi:0
Jan 25 17:01:35 wlceventd: wlceventd_proc_event(508): wl0.1: Disassoc 62:07.. [MAC-address], status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8), rssi:0

... on and on in a reoccurring loop with 10-15 minutes between. Two Android-devices on the guest network seems to be the culprint atm, but with Merlin, it happens with all devices. Tried going back a few Merlin releases, but it caused wild CPU spikes and other issues.


(yes, I've tried to disable Smart Connect, 20mhz 2.4 band etc. Not that that should be necessary, that being said. And hard-resetting, yes). Merlin is even worse than the official firmware with respect to instability. Perhaps not his fault as I understand he is relying on proprietary blobs from Asus, but ffs the Merlin features is the reason I bought Asus in the first place.

Tenants complaining, countless hours searching forums and troubleshooting etc., bugs popping out of nowhere, no solution in sight. I'm not even running anything custom, just WPS-reset'ed stock settings. I'm so fed up with this POS I'm considering tossing out my whole fleet of Asus routers and never buy Asus again.

The AC68U works with no problem as a AiMesh node (I've also tried the AC86U without AC68U as an AiMesh node), but the AC86U (main, WAN connected) is reliably unreliable and basically unusable at this point. Even my AX88U on another location started throwing some of the same errors after the recent 386.4 upgrade.

How the hell am I supposed to rely on Asus products if they reliably crash like this for several firmware versions, released months in between? Would this be acceptable for the main electricity into my house? Especially these days, reliable internet is essential, and one would expect and established brand like Asus to understand that reliability is important above anything else in a router. Then how the f*** is is possible that numerous forum users are discovering the same errors for a long time, even years back this has been a frequent issue. Do they even do basic testing in an environment before pushing this useless s**t out through the release-channel? Astounded by the lack of attention this receives.


EDIT: Two new members to the club:

EDIT2: aaaand, it goes on


https://www.reddit.com/r/WeMo/comments/krmgzp
In swedish: https://www.sweclockers.com/forum/trad/1622914-asus-rt-ac86u-tappar-internet-flera-ganger-per-dag
 
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Wallace_n_Gromit

Senior Member
I recently was having problems with my RT-AC86U losing 2.4GHz and 5GHz Wifi. The key idea in my case was RECENTLY.

I have had many, many months of what I would call flawless WiFi.

After the recent Merlin and Asus Official updates which I would happily dirty update to try out/test, I began to notice more and more frequent Wifi Drops of one or other or even both bands. Many might automatically blame the HW or SW, and in their case this might be true. In my case, I have found, not so much.

After being a member of these forums for 2 years, I had learned that dirty updates, though convenient, were never a best practice. I am just grateful that I know enough, that when things aren't working as they should be, I have a resource here to troubleshoot the problem.

The Result: 3 days 2 hour(s) 58 minute(s) 39 seconds of flawless service (again)!
 
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vincom

Regular Contributor
I recently was having problems with my RT-AC86U losing 2.4GHz and 5GHz Wifi. The key idea in my case was RECENTLY.

I have had many, many months of what I would call flawless WiFi.

After the recent Merlin and Asus Official updates which I would happily dirty update to try out/test, I began to notice more and more frequent Wifi Drops of one or other or even both bands. Many might automatically blame the HW or SW, and in their case this might be true. In my case, I have found, not so much.

After being a member of these forums for 2 years, I had learned that dirty updates, though convenient, were never a best practice. I am just grateful that I know enough, that when things aren't working as they should be, I have a resource here to troubleshoot the problem.

The Result: 2 days 2 hour(s) 45 minute(s) 29 seconds of flawless service (again)!
my 2 month old ac86u was initially having 2.4 issues with a dirty flash but otherwise running well, but 2.4 would routinely go down or multiple reconnects to my phone and and other 2.4 devices, 5ghz seem to have no issues when connecting to it after 2.4 was having issues but i need/want 2.4 for distance and penetration and all of my smart devices only use 2.4. my old ac66u had no issues, upgraded to ac86u for processor speed, i have many devices wired and 2.4 wireless, but none using 5ghz.

did a complete wipe/restore , reformat jffs, no scripts running and manually setting up devices w. 386.4 fw, default wireless settings. running perfect for a couple of weeks but then all of my 2.4 were not connecting or constant disconnects. tested 5ghz for short interval but it seemed fine. rebooting fixed the issue, been a day now and still fine. i'll see how it goes and if rebooting helps i'll add a scheduled reboot for every couple of days. i have "no" other issues as others have posted

edit. just lost network lan connection to all wired devices/pc's, reboot fixed it. sheesh. my pc was the only working one. idk why, they were on a switch, mine connected directly. but reboot seems to have fixed issue
 
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Wallace_n_Gromit

Senior Member
~ There doesn't seem to be a one size fits all solution beyond doing a basic troubleshooting step of a hard reset and reconfiguring to see if the issue persists. ~

Maybe that is the first step that many, including me, tends to do ONLY after all other methods fail. That method is working for me for last 3 days and counting.
 

Morris

Very Senior Member
To all those having drops, please make the following changes:
- Disable Smart Connect. Smart connect works by dropping clients and hoping they will reconnect
- Disable Rooming Assistant. It also works by dropping clients
- Universal Beamforming - Non standard based game that can cause issues
- Explicit Beamforming - It is not clear what standard is used. Might cause issues.

Good luck,

Morris
 

heysoundude

Part of the Furniture
I'm so fed up with this POS I'm considering tossing out my whole fleet of Asus routers and never buy Asus again.
I'll take them off your hands if they're headed to the bin - I do a bit of electronics recycling/repurposing for the local Habitat for Humanity and other charities.
You, your apartment complex, your tenants would probably appreciate networking by ubiquiti
 

XIII

Very Senior Member
- Disable Smart Connect. Smart connect works by dropping clients and hoping they will reconnect
I do indeed use SmartConnect (for quite some time), but did not experience losing all devices on a band with previous firmwares / WiFi drivers.
 

Wallace_n_Gromit

Senior Member
Starting at about 3 days 11 hours, Wife first noticed the ROKU TV wasn't connected last night on 5GHZ. So just plugged in ethernet cable, disabled WiFi. This morning at about 3 days 20 hours both 5GHz and 2.4GHz bands were off. Dang. Back to drawing board. next step will be a nuclear reset.
 

Tech9

Part of the Furniture
but did not experience losing all devices on a band with previous firmwares / WiFi drivers.

I quit testing 386.4 on AC86U due to Wi-Fi instability, but on 5GHz band. You may have to wait for the next Asuswrt-Merlin. Stock Asuswrt works better on AC86U for some unknown to me reason. I'm going to test again when Asuswrt RC3 is officially released, if it comes to AC86U.
 

jeff3820

Regular Contributor
I'll take them off your hands if they're headed to the bin - I do a bit of electronics recycling/repurposing for the local Habitat for Humanity and other charities.
You, your apartment complex, your tenants would probably appreciate networking by ubiquiti
What I setup for my son was a Ubiquiti access point, Ubiquiti switch, Ubiquiti cloud key controller, and just use the AC-86U as a router…turned the WiFi off on the AC-86U. Where the ONT comes into his apartment is in a terrible place for WiFi coverage. There was a wired cable to the best location in the apartment and the Ubiquiti solution was perfect. No issues at all and WiFi works great.
 

heysoundude

Part of the Furniture
What I setup for my son was a Ubiquiti access point, Ubiquiti switch, Ubiquiti cloud key controller, and just use the AC-86U as a router…turned the WiFi off on the AC-86U. Where the ONT comes into his apartment is in a terrible place for WiFi coverage. There was a wired cable to the best location in the apartment and the Ubiquiti solution was perfect. No issues at all and WiFi works great.
That's brilliant because you can still use the scripts. nice, I like it!
 

Tyson

New Around Here
I recently was having problems with my RT-AC86U losing 2.4GHz and 5GHz Wifi. The key idea in my case was RECENTLY.

I have had many, many months of what I would call flawless WiFi.

After the recent Merlin and Asus Official updates which I would happily dirty update to try out/test, I began to notice more and more frequent Wifi Drops of one or other or even both bands. Many might automatically blame the HW or SW, and in their case this might be true. In my case, I have found, not so much.

After being a member of these forums for 2 years, I had learned that dirty updates, though convenient, were never a best practice. I am just grateful that I know enough, that when things aren't working as they should be, I have a resource here to troubleshoot the problem.

The Result: 3 days 2 hour(s) 58 minute(s) 39 seconds of flawless service (again)!
I got same problem today. For my result I just check the WiFi channel and change it to clear WiFi channel. Finally, the problem was resolved.
 

heywire

Regular Contributor
I got same problem today. For my result I just check the WiFi channel and change it to clear WiFi channel. Finally, the problem was resolved.
"clear WiFi channel"
Do you mean set the channel manually? For 2.4ghz, 5ghz or both? I don't see a "clear" option in the settings anywhere.

And this resolved the problem for stock firmware or merlin?

Can anybody else confirm that this resolved their problems?
 

pinkgrae

Regular Contributor
"clear WiFi channel"
Do you mean set the channel manually? For 2.4ghz, 5ghz or both? I don't see a "clear" option in the settings anywhere.

And this resolved the problem for stock firmware or merlin?

Can anybody else confirm that this resolved their problems?
I'm reading @Tyson's post to mean that he manually set his wifi channel to one that was relatively clear, i.e. not suffering from interferenrece from neighbours' wifi etc. This is a tried and tested way to resolve wifi drops and other issues particularly in congested locations.

I'm not aware of a (legal) way to 'clear' wifi channels to make them available for your own use only. There is no such option in either stock or asuswrt-merlin firmware.
 

Morris

Very Senior Member
I'm reading @Tyson's post to mean that he manually set his wifi channel to one that was relatively clear, i.e. not suffering from interferenrece from neighbours' wifi etc. This is a tried and tested way to resolve a number of wifi issues.

I'm not aware of a (legal) way to 'clear' wifi channels to make them available for your own use only.

I took it to mean he set his channel to Auto which works well for me on 2.4 Ghz. This way the router will parodically check for the least busy channel and move to it. If you chose a fixed channel, it may not stay clear.

Morris
 

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