RT-AC86U intermittently but constantly dropping Internet Connection

  • ATTENTION! As of November 1, 2020, you are not able to reply to threads 6 months after the thread is opened if there are more than 500 posts in the thread.
    Threads will not be locked, so posts may still be edited by their authors.
    Just start a new thread on the topic to post if you get an error message when trying to reply to a thread.

bearever

Regular Contributor
Were you ever able to resolve this problem? I am running into the same problem with Asus Merlin 384.10_2. To make a long story short I tried resetting the router, downgrading first to 384.5 (not working) and then to 384.4 (still not working). What seemed to fix this was loading the stock Asus firmware and then after setting that up revert back to 384.10_2. I have no idea what the cause of this error is and any info (should this ever happen in the future) would be useful.
I fixed the issue entirely by turning off these 3 options in Administration / System:

IMG_8104.jpg




Sent from my iPhone using Tapatalk Pro
 

sentro

New Around Here
Thank you for the info. I'll definitely try this if the problem returns. It seems 384.10_2 defaults to these values after flashing stock and then back. Perhaps preventing webui redirection through through Asus' malware-servers did the trick :p
 

QuikSilver

Very Senior Member
I also had the same problem. Sometimes I would get it after I applied a setting on the router. I didn't change the options @bearever did but I did change the "Connect to DNS Server automatically" to Yes, where I was using google DNS there. DNS query is checked and Enable Wan down is still set to YES. Other two are set to no on mine and haven't had the issue in a couple days.
 

bearever

Regular Contributor
Thank you for the info. I'll definitely try this if the problem returns. It seems 384.10_2 defaults to these values after flashing stock and then back. Perhaps preventing webui redirection through through Asus' malware-servers did the trick :p

Yes, this reminds me that WAN down browser redirection notice has to be turned off as well ;)


Sent from my iPhone using Tapatalk Pro
 
Last edited:

bearever

Regular Contributor
I also had the same problem. Sometimes I would get it after I applied a setting on the router. I didn't change the options @bearever did but I did change the "Connect to DNS Server automatically" to Yes, where I was using google DNS there. DNS query is checked and Enable Wan down is still set to YES. Other two are set to no on mine and haven't had the issue in a couple days.
I found that Network monitoring and WAN down browser redirect notice were pretty much the root cause of my connectivity issue. Glad with 384.9, Merlin allows us to turn off the Network Monitoring.

Your mileage may vary though. Good luck dude. [emoji123]


Sent from my iPhone using Tapatalk Pro
 

EventPhotoMan

Very Senior Member
Were you ever able to resolve this problem? I am running into the same problem with Asus Merlin 384.10_2. To make a long story short I tried resetting the router, downgrading first to 384.5 (not working) and then to 384.4 (still not working). What seemed to fix this was loading the stock Asus firmware and then after setting that up revert back to 384.10_2. I have no idea what the cause of this error is and any info (should this ever happen in the future) would be useful.
I guess I will try that.

My latest concerns are devices disconnecting and reconnecting.

For the most part, restarting the device help, but I have one device 192.168.1.117, I cannot remember what it is. Even the vendor MAC address does not help me to remember.

0c 2a 69 comes back to electric imp. Incorporated. Omg what device is that on my network?
 

HKJase

New Around Here
I fixed the issue entirely by turning off these 3 options in Administration / System:

View attachment 16982

I just got this problem myself after changing my firmware to MerlinWRT 384.10_2


Sent from my iPhone using Tapatalk Pro
I fixed the issue entirely by turning off these 3 options in Administration / System:

View attachment 16982



Sent from my iPhone using Tapatalk Pro
I just got this problem myself after upgrading the firmware to MerlinWRT 384.11_2 on my Asus RT-AC86U.

I happen to be on Netvigator with the Huawei VDSL hardware.

Is the status checking the cause for the disconnection? I went back to stock current version Asus firmware which has everything stable again, but I'd like to go back to MerlinWRT.
 

bearever

Regular Contributor
I just got this problem myself after upgrading the firmware to MerlinWRT 384.11_2 on my Asus RT-AC86U.

I happen to be on Netvigator with the Huawei VDSL hardware.

Is the status checking the cause for the disconnection? I went back to stock current version Asus firmware which has everything stable again, but I'd like to go back to MerlinWRT.
Have you tried my settings suggestion above? I am also using Netvigator and with the options above and I no longer suffer from random connection disconnects issue.

And also I use 1.1.1.1 and 1.0.0.1 instead of Netvigator supplied DNS


Sent from my iPhone using Tapatalk Pro
 

HKJase

New Around Here
Have you tried my settings suggestion above? I am also using Netvigator and with the options above and I no longer suffer from random connection disconnects issue.

And also I use 1.1.1.1 and 1.0.0.1 instead of Netvigator supplied DNS


Sent from my iPhone using Tapatalk Pro
I'll give it a go tomorrow and see. I use a special service DNS with a HK POP to get around geo-blocking of Australian, UK and US IPTV streams.

I assume you live out on an outlying island or Sai Kung area too seeing as your use Netvigator?
 

bearever

Regular Contributor
I'll give it a go tomorrow and see. I use a special service DNS with a HK POP to get around geo-blocking of Australian, UK and US IPTV streams.

I assume you live out on an outlying island or Sai Kung area too seeing as your use Netvigator?
I previously used getflix/dns4me services and did not have such issue. Netvigator DNS servers sometimes are problematic and should be avoided. I live in Kowloon area FYI.

Sending you my configuration screens for your reference:

IMG_8615.jpg

IMG_8616.jpg





Sent from my iPhone using Tapatalk Pro
 

bearever

Regular Contributor
Cheers mate, most helpful.

Sent from my MI MAX 2 using Tapatalk
Cheers let me know if you are still running issues.

My internet connection used to be going down every 3 or 5 days or so and the abovementioned settings fixed it.


Sent from my iPhone using Tapatalk Pro
 

jrtwynam

New Around Here
Hi all,

I came across this thread because I'm having a similar problem. Based on reading through pretty much this whole thread, it seems that the problem described here is that the INTERNET connection stops working, but the NETWORK itself is still working. My problem first shows itself when I see that the internet has stopped working, but when it happens, my whole network is actually down. None of my shared drives is accessible, I can't remote desktop into my other PC, and I can't even access my router's setup page. So far, the only thing I've found that fixes it is power cycling the router, but even that often takes two or three tries to get everything back up and running. The issue doesn't seem to have any sort of pattern to it - sometimes the router will work perfectly for a couple of weeks and then stop. Sometimes it will work only for a couple of hours and then stop again. Sometimes the power cycle works on the first try, other times it takes two or three tries. Sometimes it happens in the evening, other times in the morning.

I've tried upgrading to the firmware to Merlin, at the suggestion of one of the posts somewhere in this thread, and I'm currently on v384.19. No luck there. I've also checked a variety of settings mentioned in the various screenshots posted, for example this one (this is my version of these settings), and found that they match the suggested settings:

1606061417975.png


The router is only maybe 6 months old at this point - I bought it somewhere around June 2020. I read a post somewhere that suggested it might be the AC power adapter, which is one of the only suggestions in this thread that I haven't yet tried (mainly because I don't have a spare one). Still, when the issue happens, the router still has power - all the LED indicators are still lit up, claiming that the router is working, so it's as if the router "forgot" that it's powered on.

Does anyone have any suggestions? Or is there any other information I could post that might help?

Thanks.
 

L&LD

Part of the Furniture
Have you tried using 1.0.0.1 and 1.1.1.1 on the WAN DNS entries?
 

jrtwynam

New Around Here
Have you tried using 1.0.0.1 and 1.1.1.1 on the WAN DNS entries?
Not yet, mainly because I'm not really sure that that does. It seems like it would be something that has to do with WAN, but not much with LAN, and since it's both that seem to go down for me, it didn't seem like it would solve the issue. Although I suppose it would be worth a try if only to rule it out.

I just changed the setting right now, but since this is an intermittent problem that I can't reproduce at will, I won't know for a bit whether this made a difference.
 

ghostivv

Occasional Visitor
when you first had the router, did you perform hard reset? I bought from Amazon warehouse deal as used item and was experiencing very similar to yours. I was doing reset from gui and it kept on having issues on new flash. Had to do button combi ie WPS + power hard reset. Everything was working for months and then last week of Oct suddenly started having same problem. Disabled OpenVPN server, No DDNS, unistalled all addons but didn't help so installed them back. I don't know what did the trick but on WAN page under Special requirement from ISP, Enable VPN + DHCP was Yes. I don't know what this does but thought it is a default option. Anyway I put this on No and ever since not had single disconnections.

My 86U is behind Zylex Modem. Maybe I accidentally pressed Clone MAC button on WAN page? Dunno but happy now as everything is working.
 

jrtwynam

New Around Here
No, I didn't do a hard reset when I first bought it. I bought it from Amazon, but it was a brand new item, so a hard reset shouldn't be necessary. It's something I'll keep in mind though if this 1.1.1.1 DNS thing doesn't work, but I'd really prefer not to if I can avoid it because it took me awhile to get certain things working (although I suppose I could take some screenshots before doing a hard reset).

I don't seem to have those options you mention under Special Requirement from ISP:

1606106556833.png
 

Centrifuge

Regular Contributor
No, I didn't do a hard reset
I would factory reset. Up there on @L&LD's tagline he has some great troubleshooting directions (https://www.snbforums.com/members/l-ld.24423/#about). Hard to troubleshoot more as you give few details of your setup, scripts you are using, unique settings etc. The 86U had problems with recent updates that require significant user intervention in some cases, you could read the 384.19 thread to get an idea if that is what's going on for you.
 

Similar threads

Sign Up For SNBForums Daily Digest

Get an update of what's new every day delivered to your mailbox. Sign up here!
Top