So, they emailed again saying that the log problem is high-priority problem.

So, waiting game now.

@LaMpiR Any reply on the high priority problem?

@FireDZ I change the topology of my network.

I installed my Fritzbox router as router (wifi disabled) and the 3 decos are now all access point. The 'main' deco is connected to the lan port of the Fritzbox.

This has been working great the last few days. No lag or drops.

i have a total of about 12 wireless devices connected.

Old toplogy:

VDSL modem > Port Deco 1 (router mode) 

Deco 1 (router mode) > Deco 2 AP (5 meter, 1 wall) > Deco 3 AP (5 meter first floor, concrete with steel).

The new topolgy is:

VDSL modem > Wan port Fritzbox (firewall, port-redirection, dhcp etc..) 

Lan Port 1 Fritzbox > Main deco AP > Deco 2 AP (5 meter, 1 wall) > Deco 3 AP (5 meter first floor, concrete with steel).

Lan port 2 Fritzbox > rest of the network (Synology, main PC, 2  pihole, docker server, IoT hubs etc)

On both Deco 2 and 3 there are devices connected by wire. They max out on internet speed (100Mbit).

The main AP has a cpu load between 5% and 70%. This is a lot lower than in router mode.

Memory about 50%.

Seems that the router function of a Deco is part of the problem.

Hope this helps. 

I will keep this setup because the router function of the Deco is too limited for me (no DNS settings in DHCP etc).

@JoeHiggins 

sorry for not replying. Nothing yet.

I am pretty sure they don't take this as a priority since its been months now.

I've noticed a new firmware is now available on global support site 

https://www.tp-link.com/en/support/download/deco-p9/#Firmware

Since it claims for improved stability I've installed it in my 3 deco setup but after less than a day same instability problems are happening.

Only configuration stable is with 2 units (in my case are both connected through Ethernet wired line in AP mode). Adding the 3rd unit either using Ethernet, WiFi or PLC backhaul the entire network crashes after some hours with no internet connectivity and SIGTERM messages appearing in logs.

please investigate further on the issue and provide new firmware update because latest published doesn't solve.

I am being disconnect with signal being weaker now. 

Before the update, worked a lot better. 

Will dig through logs today in order to see what is happening. 

Our wifi is a lot less stable with cleints disconnecting and not being able to find the wifi for a minute and then it`s back on.

No such interface error is gone. A lot of warnings of Failed to get uplink rssi...

Anybode experiencing the loss of wifi stability with the update?

Error:

Sun Sep 20 09:18:58 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:19:07 2020 daemon.err client_mgmt: wireless client associate or disassociate.
Sun Sep 20 09:19:07 2020 daemon.err client_mgmt: client_mac:xx:xx:xx:xx:xx:xx, client_ifname:ath1, client_action:disassociate
Sun Sep 20 09:19:07 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) disassocaite by if(ath1).
Sun Sep 20 09:19:59 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:20:38 2020 daemon.err client_mgmt: wireless client associate or disassociate.
Sun Sep 20 09:20:38 2020 daemon.err client_mgmt: client_mac:xx:xx:xx:xx:xx:xx, client_ifname:ath1, client_action:associate
Sun Sep 20 09:20:38 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) assocaite by if(ath1).
Sun Sep 20 09:20:42 2020 daemon.err nrd[11458]: estimatorCmnHandleBeaconReportEvent: Invalid beacon report for xx:xx:xx:xx:xx:0B
Sun Sep 20 09:20:48 2020 daemon.err nrd[11458]: wlanifBSteerEventsHandleBeaconReport: Can't find local reported BSS on band of channel 0 for BSS 00:00:00:00:00:00
Sun Sep 20 09:20:51 2020 daemon.err nrd[11458]: estimatorDot11kIterateCB: Timeout waiting for 802.11k response from xx:xx:xx:xx:xx:0B
Sun Sep 20 09:20:57 2020 daemon.err nrd[11458]: estimatorCmnHandleBeaconReportEvent: Invalid beacon report for xx:xx:xx:xx:xx:0B
Sun Sep 20 09:20:58 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:21:03 2020 daemon.err nrd[11458]: estimatorCmnHandleBeaconReportEvent: Invalid beacon report for xx:xx:xx:xx:xx:0B
Sun Sep 20 09:21:10 2020 daemon.err nrd[11458]: estimatorCmnHandleBeaconReportEvent: Invalid beacon report for xx:xx:xx:xx:xx:0B
Sun Sep 20 09:21:17 2020 daemon.err nrd[11458]: estimatorCmnHandleBeaconReportEvent: Invalid beacon report for xx:xx:xx:xx:xx:0B
Sun Sep 20 09:21:26 2020 daemon.err nrd[11458]: estimatorDot11kIterateCB: Timeout waiting for 802.11k response from xx:xx:xx:xx:xx:0B
Sun Sep 20 09:21:28 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:21:47 2020 daemon.err nrd[11458]: wlanifBSteerEventsHandleBeaconReport: Can't find local reported BSS on band of channel 0 for BSS 00:00:00:00:00:00
Sun Sep 20 09:21:49 2020 daemon.err nrd[11458]: estimatorDot11kIterateCB: Timeout waiting for 802.11k response from xx:xx:xx:xx:xx:0B
Sun Sep 20 09:21:57 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:22:23 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:23:01 2020 daemon.err client_mgmt: wireless client associate or disassociate.
Sun Sep 20 09:23:01 2020 daemon.err client_mgmt: client_mac:xx:xx:xx:xx:xx:xx, client_ifname:ath01, client_action:associate
Sun Sep 20 09:23:01 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) assocaite by if(ath01).
Sun Sep 20 09:23:01 2020 daemon.err udhcpd[5535]: Sending ACK to 192.168.68.104
Sun Sep 20 09:23:01 2020 daemon.err udhcpd[5535]: clear ip c0a84468
Sun Sep 20 09:23:24 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:24:13 2020 daemon.err nrd[11458]: estimatorCmnHandleBeaconReportEvent: Invalid beacon report for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:24:19 2020 daemon.err nrd[11458]: estimatorCmnHandleBeaconReportEvent: Invalid beacon report for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:24:22 2020 daemon.err udhcpd[5535]: Sending ACK to 192.168.68.101
Sun Sep 20 09:24:22 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:24:23 2020 daemon.err client_mgmt: wireless client associate or disassociate.
Sun Sep 20 09:24:23 2020 daemon.err client_mgmt: client_mac:xx:xx:xx:xx:xx:xx, client_ifname:ath1, client_action:disassociate
Sun Sep 20 09:24:23 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) disassocaite by if(ath1).
Sun Sep 20 09:24:26 2020 daemon.err udhcpd[5535]: Sending ACK to 192.168.68.101
Sun Sep 20 09:24:26 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:24:27 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:24:27 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:24:28 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:24:28 2020 daemon.err nrd[11458]: estimatorDot11kIterateCB: Timeout waiting for 802.11k response from xx:xx:xx:xx:xx:xx
Sun Sep 20 09:24:31 2020 daemon.err client_mgmt: wireless client associate or disassociate.
Sun Sep 20 09:24:31 2020 daemon.err client_mgmt: client_mac:xx:xx:xx:xx:xx:xx, client_ifname:ath1, client_action:disassociate
Sun Sep 20 09:24:31 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) disassocaite by if(ath1).
Sun Sep 20 09:24:31 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:24:31 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:24:39 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:24:39 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:24:54 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:24:54 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:24:58 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:24:58 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:25:06 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:25:06 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:25:22 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:25:22 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:25:24 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:25:24 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:25:29 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:25:29 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:25:37 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:25:37 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:25:40 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:25:55 2020 daemon.err client_mgmt: wireless client associate or disassociate.
Sun Sep 20 09:25:55 2020 daemon.err client_mgmt: client_mac:xx:xx:xx:xx:xx:xx, client_ifname:ath1, client_action:associate
Sun Sep 20 09:25:55 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) assocaite by if(ath1).
Sun Sep 20 09:25:55 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:25:55 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.101
Sun Sep 20 09:25:55 2020 daemon.err udhcpd[5535]: Sending ACK to 192.168.68.101
Sun Sep 20 09:25:55 2020 daemon.err udhcpd[5535]: clear ip c0a84465
Sun Sep 20 09:25:56 2020 daemon.err client_mgmt: wireless client associate or disassociate.
Sun Sep 20 09:25:56 2020 daemon.err client_mgmt: client_mac:xx:xx:xx:xx:xx:xx, client_ifname:ath1, client_action:associate
Sun Sep 20 09:25:56 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) assocaite by if(ath1).
Sun Sep 20 09:25:59 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:26:09 2020 daemon.err udhcpd[5535]: Found static lease: c0a84464
Sun Sep 20 09:26:09 2020 daemon.err udhcpd[5535]: Sending ACK to 192.168.68.100
Sun Sep 20 09:26:09 2020 daemon.err udhcpd[5535]: clear ip c0a84464
Sun Sep 20 09:26:39 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:27:39 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) not found in arp table disconnect_counter=0
Sun Sep 20 09:27:39 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) not found in arp table disconnect_counter=0
Sun Sep 20 09:27:47 2020 daemon.err client_mgmt: wireless client associate or disassociate.
Sun Sep 20 09:27:47 2020 daemon.err client_mgmt: client_mac:xx:xx:xx:xx:xx:xx, client_ifname:ath1, client_action:associate
Sun Sep 20 09:27:47 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) assocaite by if(ath1).
Sun Sep 20 09:27:57 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) not found in arp table disconnect_counter=1
Sun Sep 20 09:27:57 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) not found in arp table disconnect_counter=1
Sun Sep 20 09:27:57 2020 daemon.err client_mgmt: wireless client associate or disassociate.
Sun Sep 20 09:27:57 2020 daemon.err client_mgmt: client_mac:xx:xx:xx:xx:xx:xx, client_ifname:ath1, client_action:disassociate
Sun Sep 20 09:27:57 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) disassocaite by if(ath1).
Sun Sep 20 09:28:02 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:28:15 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) not found in arp table disconnect_counter=2
Sun Sep 20 09:28:16 2020 daemon.err client_mgmt: client(xx:xx:xx:xx:xx:xx) not found in arp table disconnect_counter=2
Sun Sep 20 09:29:09 2020 daemon.err udhcpd[5535]: clear ip c0a84469
Sun Sep 20 09:29:09 2020 daemon.err udhcpd[5535]: Sending OFFER of 192.168.68.105
Sun Sep 20 09:29:09 2020 daemon.err udhcpd[5535]: Sending ACK to 192.168.68.105
Sun Sep 20 09:29:09 2020 daemon.err udhcpd[5535]: clear ip c0a84469
Sun Sep 20 09:29:46 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:29:56 2020 daemon.err uhttpd[6930]: ath22     no frequency information.
Sun Sep 20 09:29:56 2020 daemon.err uhttpd[6930]: 
Sun Sep 20 09:30:00 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:30:05 2020 daemon.err uhttpd[6930]: ath22     no frequency information.
Sun Sep 20 09:30:05 2020 daemon.err uhttpd[6930]: 
Sun Sep 20 09:30:16 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:30:37 2020 daemon.err uhttpd[6930]: ath22     no frequency information.
Sun Sep 20 09:30:37 2020 daemon.err uhttpd[6930]: 
Sun Sep 20 09:31:03 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
Sun Sep 20 09:31:23 2020 daemon.err nrd[11458]: triggerMonSteering: Failed to get uplink rssi for xx:xx:xx:xx:xx:xx
 

@FireDZ Has anybody updated to one of the two latest updates? I am still on 52023. Yesterday and this morning I had to reboot all p9's for the first time in weeks.

Is it possible to manually flash an older firmware if a newer one is applied?

In that case, are older firmwares available for download?

@ReneP 

I have just done it, since the new firmware enables the WPA/WPA2 switching.

We have brought it to their attention a long time ago, and just know when they got pressured from apple users since all iPhones with new software got an error that the WIFI is not secure, since it wasn't. They were using WPA as well.

I will know the stability in a few days.

@LaMpiR 

I updated a few days ago; stability appears unchanged. Additionally, the volume of errors in logs is unchanged!