Deco S4 performance drops from ~350Mbps to 22Mbps when experiencing an event recorded in System log.

Deco S4 performance drops from ~350Mbps to 22Mbps when experiencing an event recorded in System log.
Deco S4 performance drops from ~350Mbps to 22Mbps when experiencing an event recorded in System log.
2022-01-12 15:54:30
Model: Deco S4
Hardware Version: V2
Firmware Version: 1.5.0

Hi - having spent hours trying to figure out what was happening with the performance of my S4, I've narrowed it a single event that is repeatedly logged on my S4's system log:

 

Sun Jan  9 16:37:31 2022 daemon.info hostapd: ath1: STA 50:32:37:c8:db:40 IEEE 802.11: disassociated
Sun Jan  9 16:37:31 2022 daemon.err client_mgmt: wireless client associate or disassociate.
Sun Jan  9 16:37:31 2022 daemon.err client_mgmt: client_mac:50-32-37-C8-DB-40, client_ifname:ath1, client_action:disassociate
Sun Jan  9 16:37:31 2022 daemon.err client_mgmt: client(50-32-37-C8-DB-40) disassocaite by if(ath1).
Sun Jan  9 16:37:36 2022 daemon.info hostapd: ath1: STA 50:32:37:c8:db:40 IEEE 802.11: associated
Sun Jan  9 16:37:36 2022 daemon.info hostapd: ath1: STA 50:32:37:c8:db:40 RADIUS: starting accounting session 69E4FA6E2BA0EE09
Sun Jan  9 16:37:36 2022 daemon.info hostapd: ath1: STA 50:32:37:c8:db:40 WPA: pairwise key handshake completed (RSN)
Sun Jan  9 16:37:36 2022 daemon.notice nrd[5239]: wlanifBSteerEventsHandleNodeAssociatedInd: Node 50:32:37:C8:DB:40 associated on APId 255 ChanId 44  ESSId 0  , Capabilities:  RRM  , Max bandwidth: 2, Num of spatial streams: 2, PHY mode: 19, Max MCS: 9. Max TX power: 19
Sun Jan  9 16:37:36 2022 daemon.notice nrd[5239]: wlanifLinkEventsCmnGenerateDisassocEvent: Client 50:32:37:C8:DB:40 disassociated on APId 255 ChanId 44  ESSId 0 

 

This event is happening very rapidly and is set at "Error" severity level.   The S4 mesh on reboot works for a few hours and then is rendered to its knees by this 'errant' MAC address (50:32:37:c8:db:40) which is an Apple TV 4K connected to my local network via wired Ethernet.   By resetting the Apple TV and re-establishing the wired connection, it appears that I've disabled the Apple TV WiFi connection and these error messages have stopped and my performance has remained steady at ~350Mbps but it concerns me that a single misbehaving client could have such an effect on my mesh.  Equally concerning is that my only form of diagnosiing the problem is deep down in the bowels of a system log that is only really accessible from the web interface and not the application.

 

Any ideas on what this exchange is and why it kills my S4 mesh?   TP-Link - if you're reading this, fix the 'disassocaite' typo in the err.msg.

 

p

 

 

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Re:Deco S4 performance drops from ~350Mbps to 22Mbps when experiencing an event recorded in System log.
2022-01-14 06:57:00

@fpgirard 

Hi, could you please help me check one thing:

Previously, the Apple TV is connected to the Wi-Fi of Deco and the speed of Deco dropped from 350m/s to 22m/s, then you find some error logs and disabled the wireless connection, and switch the TV to a wired Ethernet cable connection. Finally, the speed became normal, am I right?

The system log displayed the roaming behavior of the client and it is only seen on a device that did not support the fast roaming protocol.

Later if possible, you could still try to connect the TV to the Wi-Fi of Deco and turn off the Mesh technology of the Apple TV on the Deco APP.

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Re:Deco S4 performance drops from ~350Mbps to 22Mbps when experiencing an event recorded in System log.
2022-01-14 13:59:26

@fpgirard your understanding is correct.  What's super weird is two things:

 

1. The Apple TV is not mobile - it remains in one spot so it should not be roaming at all.  

2. The Apple TV was ethernet wired the entire time and should not have had the WiFi antenna turned on at all.  From what I understand, Apple TV turns off the WiFi interface when ethernet is connected.  I simply went through this procedure again to see if it would disable it.  Apparently it worked this time.

 

If it happens again, I'll disable the mesh.  Thank you!

 

Pascal

 

 

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