[Mostly Solved] R7800 stops responding to clients

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blkt
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PostPosted: Fri May 06, 2022 10:46    Post subject: Reply with quote
My tested working settings are defaults except, Channel, Short Preamble, TX.

Done editing last post lol. All I can suggest is one at a time until you discover.

Anyway, you know my opinion. r48810 does have an ath10k fix, worth a shot.

Edit: forgot to mention that I use Vanilla, but you already have this set. YMMV.


Last edited by blkt on Fri May 06, 2022 11:02; edited 2 times in total
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mrjcd
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PostPosted: Fri May 06, 2022 10:50    Post subject: Reply with quote
disable the Airtime Fairness
IONK
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PostPosted: Fri May 06, 2022 11:51    Post subject: Reply with quote
Thanks everyone for the suggestions.
Just to clarify about "a lot of devices leaving/joining the network": I have up to 30 wireless devices at one time, but they come and go, so there are about 50-60 DHCP clients after a day (mix of iOS/Android/Windows). My existing settings are fine for a few devices, but the issues pop out when having many devices, so any suggestion please take that into account. Please also mention the number of wireless devices in your tests if possible.
I'll erase nvram and reconfigure everything from scratch, and refrain from trying funny things this time, hopefully the issue is due to the remnants of my bad settings.

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ho1Aetoo
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PostPosted: Fri May 06, 2022 12:15    Post subject: Reply with quote
IONK wrote:
[*]iPhone 13 frequently disconnects from WiFi "EEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)" <--- I disable "Disassoc Low Ack" and 802.11r (FT) and no more issue.


But the "Disassoc Low Ack" message is a different one ...

IEEE 802.11: disconnected due to excessive missing ACKs

Wink
IONK
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PostPosted: Fri May 06, 2022 12:24    Post subject: Reply with quote
ho1Aetoo wrote:
IONK wrote:
[*]iPhone 13 frequently disconnects from WiFi "EEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)" <--- I disable "Disassoc Low Ack" and 802.11r (FT) and no more issue.


But the "Disassoc Low Ack" message is a different one ...

IEEE 802.11: disconnected due to excessive missing ACKs

Wink
noted, so it's not the "Disassoc Low Ack". Must be the 802.11r (FT) then.
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ho1Aetoo
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PostPosted: Fri May 06, 2022 12:32    Post subject: Reply with quote
is also documented under the link >

https://openwrt.org/faq/disconnected_due_to_excessive_missing_acks
IONK
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PostPosted: Tue May 10, 2022 6:44    Post subject: Reply with quote
ho1Aetoo wrote:
is also documented under the link >

https://openwrt.org/faq/disconnected_due_to_excessive_missing_acks
It may not be related, but I found this old discussion https://forum.openwrt.org/t/solved-deauthenticated-due-to-inactivity-after-seconds/16294 , so I tried disabling "disassoc_low_ack" as a desperate attempt.
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ho1Aetoo
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PostPosted: Tue May 10, 2022 6:53    Post subject: Reply with quote
This is on a Marvel router.
The Marvel WLAN drivers do not report valid ACK values.
And "disassoc_low_ack" is disabled on them.

Also known for a long time.
IONK
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PostPosted: Tue May 10, 2022 6:56    Post subject: Reply with quote
Update:
one Dell laptop bc:17:b8:xx:xx:ff (Intel Wi-Fi 6 AX201) still encounters random WiFi disconnections.
I suspect there's a correlation between these few log lines:
Code:
kern.warn kernel: [191453.250791] ath10k_warn: 238 callbacks suppressed
kern.warn kernel: [191453.250800] ath10k_pci 0000:01:00.0: failed to lookup txq for peer_id 165 tid 0
...
daemon.info hostapd: wlan0: STA bc:17:b8:xx:xx:ff MLME: auth request, signal -66 (Accepted)

To me, it looks like when some other devices disconnect from WiFi (out of range), then the Dell laptop (and maybe some others that are listed in the log) are disconnected.
XR500 is running DD-WRT v3.0-r48810 std (05/06/22).
I have 2 options: 1) downgrade to a 2-year-old DD-WRT build (suggested by one user) then pray or 2) decommission this XR500.
Or maybe someone is kind enough to point out the reason why the Dell laptop is disconnected when other WiFi devices are out of range.

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Last edited by IONK on Tue May 10, 2022 7:09; edited 3 times in total
ho1Aetoo
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PostPosted: Tue May 10, 2022 6:59    Post subject: Reply with quote
BrainSlayer wrote:
there is no option for. it. its set by default to 0 on all mvebu based devices since these devices do not report valid ack values.


https://svn.dd-wrt.com/ticket/7365#comment:7

See link
IONK
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PostPosted: Tue May 10, 2022 7:06    Post subject: Reply with quote
ho1Aetoo wrote:
BrainSlayer wrote:
there is no option for. it. its set by default to 0 on all mvebu based devices since these devices do not report valid ack values.


https://svn.dd-wrt.com/ticket/7365

See link
Thanks for the link. I'm in no state of mind to go through that at the moment. I'll keep "disassoc_low_ack" as "disabled" for now, since the problem seems to be something else.
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ho1Aetoo
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PostPosted: Tue May 10, 2022 7:35    Post subject: Reply with quote
Well, if the problems always occur when clients move out of range.
Then you can play with these two settings "disassoc_low_ack" and "Minimum Signal for connection".

So that it disconnects the clients in time before they somehow negatively influence the network performance.

otherwise try another older build.

The Atheros drivers and firmware are constantly being developed and bugs creep in from time to time.
IONK
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PostPosted: Tue May 10, 2022 7:58    Post subject: Reply with quote
It just happened again on the same Dell laptop.
This Dell laptop is having Zoom meeting, so I get immediate feedback from the user when the Dell laptop is disconnected. However, there can be other devices having the same issue but not being noticed/reported.

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IONK
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PostPosted: Tue May 10, 2022 8:03    Post subject: Reply with quote
ho1Aetoo wrote:
Well, if the problems always occur when clients move out of range.
Then you can play with these two settings "disassoc_low_ack" and "Minimum Signal for connection".

So that it disconnects the clients in time before they somehow negatively influence the network performance.

otherwise try another older build.

The Atheros drivers and firmware are constantly being developed and bugs creep in from time to time.

The Zoom meeting is still on-going, so I can't apply any setting or reboot the router.
My concerns:
- Will it make any difference if the router actively drops the WiFi connection instead of waiting for the wireless client to move out of range?
- Why am I the only one having this problem? (maybe the OP "e-" also has the same problem) What's the procedure to trigger this problem?
I can revert to as many older builds as I want when there's no one using the WiFi, but without understanding the trigger conditions, how to know if the issue is gone or not?

EDIT: "Minimum signal for connection" only may not be enough, there are also "Poll Time for signal lookup" "Amount of allowed low signals".

For background info, my previous router (Aztech, provided by ISP) had strange issue (when many devices were connected, newly connected wireless device had no internet access, webui was inaccessible). WiFi connection is critical because some users are teachers and they need to conduct lesson over Zoom. Other wireless devices are owned by students, and they come and go according to their timetable.

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Last edited by IONK on Tue May 10, 2022 8:17; edited 1 time in total
egc
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PostPosted: Tue May 10, 2022 8:15    Post subject: Reply with quote
One rogue client can bring down a network, have you tried to update the offending client?
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