AC-86U 5Ghz band disappearing problem

[asaf27064]

Hi,
I have ASUS AC-86U router i bought 3 months ago.
its has the latest merlin wrt version 384.14_2
i have 1 Gbps fiber pppoe connection
and I have really annoying problem with it on wifi.
I have 2 ssid one 2.4ghz band and one 5ghz
once in a while the connection to the 5ghz ssid lost and the 5ghz disappearing and i can only connect to the 2.4ghz.
sometimes i can connect to the 5ghz but the phone says "connected, not internet" and the 2.4ghz works normally.
i tried a lot of phones and its the same result.
its happens randomly, once in a week or a month, can't say for sure.
the only thing that works is reboot router and then all back to normal and work great.
i've already did factory reset and it doesn't help.
maybe its related to some settings i have change in the professional tab?
or maybe the region? I live in Israel and set the region to Europe, is it ok?
i have attached my general settings to 2.4ghz and 5ghz and also the professional settings below
Please help me, I don't understand what's wrong.

 

[OzarkEdge]

I have ASUS AC-86U router i bought 3 months ago.
its has the latest merlin wrt version 384.14_2

Did you reset the router after installing the firmware and configure from scratch?

I might try n/ac mixed, 80 MHz, and ch 149 or above for 5.0 GHz, although I'm not familiar with those channels in your country.

The only other non-default wireless settings I use:

- disable Airtime Fairness per band (incompatible with some adapters);

- disable Universal Beamforming per band, if causing instability/lower link rates with legacy adapters.

OE

 

[asaf27064]

Did you reset the router after installing the firmware and configure from scratch?

I might try n/ac mixed, 80 MHz, and ch 149 or above for 5.0 GHz, although I'm not familiar with those channels in your country.

The only other non-default wireless settings I use:

- disable Airtime Fairness per band (incompatible with some adapters);

- disable Universal Beamforming per band, if causing instability/lower link rates with legacy adapters.

OE

I have already did factory reset after installing and as you can see in photos i disabled Airtime Fairness and Universal Beamforming

Thanks for the reply buddy

 

[OzarkEdge]

I have already did factory reset after installing and as you can see in photos i disabled Airtime Fairness and Universal Beamforming

Thanks for the reply buddy

I would try a local re-flash, reset, and re-config from scratch.

I would try separate SSIDs and fixed channels (no Smart Connect). Try different channels to escape any ambient signal interference (snooping intelligence agency ).

I would try a previous firmware like Asuswrt 81049 or the equivalent Asuswrt-Merlin build.

Then I would suspect a (new) hardware issue.

OE

 

[asaf27064]

I would try a local re-flash, reset, and re-config from scratch.

I would try separate SSIDs and fixed channels (no Smart Connect). Try different channels to escape any ambient signal interference (snooping intelligence agency ).

I would try a previous firmware like Asuswrt 81049 or the equivalent Asuswrt-Merlin build.

Then I would suspect a (new) hardware issue.

OE

thanks for the reply again!
what do you mean by separate SSIDs? if you mean one ssid for 2.4ghz and one for 5ghz so i already done that and i disabled smart connect.
i will try reset and re flash merlin.
do you have any recommandations for reset?
thanks man!!

 

[OzarkEdge]

thanks for the reply again!
what do you mean by separate SSIDs? if you mean one ssid for 2.4ghz and one for 5ghz so i already done that and i disabled smart connect.
i will try reset and re flash merlin.
do you have any recommandations for reset?
thanks man!!

The webUI Restore w/Initialization checked will reset and wipe logged data, so a bit tidier that just the button reset.

For a button reset, hold it until the Power LED begins to flash slowly.

OE

 

[asaf27064]

I forgot to mention that i have a repeater connected wirelessly to my router
Can it cause the problem?

Thank you!

 

[Going_Strong]

Having used a bunch of repeaters with a bunch of routers over the years (currently the TP-Link CE650 with the TP-Link C5400X), I would venture the opinion that no, a repeater connected wirelessly to your router is not causing the problem.
Dedicated repeaters are essentially "router neutral" (or so their manufacturers state).

NB The above is based on the assumption that neither your router nor your repeater is faulty.

 

[bitsbytes]

https://www.snbforums.com/threads/weird-2-4-issue-on-a-86u-router.59841/#post-522210

this is my thread from a while ago. I had the exact same problem but on the 2.4 band and in the end it was a tplink repeater that was causing the problem.

 

[OzarkEdge]

I forgot to mention that i have a repeater connected wirelessly to my router
Can it cause the problem?

Thank you!

Unplug it and find out.

OE

 

[Going_Strong]

Unplug it and find out.

OE

By far the simplest and most sensible answer.

 

[asaf27064]

Ok so after factory reset and installing the new merlin firmware 384.15 everything is perfect
but now i have a new problem:
im trying to connect my reapter to the asus ac86u and its not able to connect
on the asus log its says this: what its means "Deauthenticated because sending station is leaving"?

Feb 22 14:10:33 wlceventd: WLCEVENTD wlceventd_proc_event(420): eth6: Auth 56:C2:F5:6E:EE:A4, status: 0, reason: d11 RC reserved (0)
Feb 22 14:10:33 wlceventd: WLCEVENTD wlceventd_proc_event(449): eth6: Assoc 56:C2:F5:6E:EE:A4, status: 0, reason: d11 RC reserved (0)
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPDISCOVER(br0) 56:c2:f5:6e:ee:a4
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPOFFER(br0) 192.168.50.231 56:c2:f5:6e:ee:a4
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPDISCOVER(br0) 56:c2:f5:6e:ee:a4
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPOFFER(br0) 192.168.50.231 56:c2:f5:6e:ee:a4
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPDISCOVER(br0) 56:c2:f5:6e:ee:a4
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPOFFER(br0) 192.168.50.231 56:c2:f5:6e:ee:a4
Feb 22 14:10:52 wlceventd: WLCEVENTD wlceventd_proc_event(386): eth6: Deauth_ind 56:C2:F5:6E:EE:A4, status: 0, reason: Deauthenticated because sending station is leaving (or has left) IBSS or ESS (3)
Feb 22 14:10:52 wlceventd: WLCEVENTD wlceventd_proc_event(401): eth6: Disassoc 56:C2:F5:6E:EE:A4, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8)

 

[DarkKnight75]

Ok so after factory reset and installing the new merlin firmware 384.15 everything is perfect
but now i have a new problem:
im trying to connect my reapter to the asus ac86u and its not able to connect
on the asus log its says this: what its means "Deauthenticated because sending station is leaving"?

Feb 22 14:10:33 wlceventd: WLCEVENTD wlceventd_proc_event(420): eth6: Auth 56:C2:F5:6E:EE:A4, status: 0, reason: d11 RC reserved (0)
Feb 22 14:10:33 wlceventd: WLCEVENTD wlceventd_proc_event(449): eth6: Assoc 56:C2:F5:6E:EE:A4, status: 0, reason: d11 RC reserved (0)
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPDISCOVER(br0) 56:c2:f5:6e:ee:a4
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPOFFER(br0) 192.168.50.231 56:c2:f5:6e:ee:a4
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPDISCOVER(br0) 56:c2:f5:6e:ee:a4
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPOFFER(br0) 192.168.50.231 56:c2:f5:6e:ee:a4
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPDISCOVER(br0) 56:c2:f5:6e:ee:a4
Feb 22 14:10:41 dnsmasq-dhcp[946]: DHCPOFFER(br0) 192.168.50.231 56:c2:f5:6e:ee:a4
Feb 22 14:10:52 wlceventd: WLCEVENTD wlceventd_proc_event(386): eth6: Deauth_ind 56:C2:F5:6E:EE:A4, status: 0, reason: Deauthenticated because sending station is leaving (or has left) IBSS or ESS (3)
Feb 22 14:10:52 wlceventd: WLCEVENTD wlceventd_proc_event(401): eth6: Disassoc 56:C2:F5:6E:EE:A4, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8)

Expected chatter from Asus firmware...i rolled back to 384.12 and the chatter stopped. This also caused some instability on 2.4 and 5ghz on my ac86u

 

[asaf27064]

Expected chatter from Asus firmware...i rolled back to 384.12 and the chatter stopped. This also caused some instability on 2.4 and 5ghz on my ac86u

I did what you have said, the chatter didnt stopped and the repeater is still doesnt able to connect to my router