@ZdenekM PPTP refer to the VPN settings. If you don't need the VPN server, just disable the PPTP VPN server on Controller--Settings-->VPN.

@Dsinc I had 802.1p/DSCP QoS tested before without issue. But according to your description you may actually use Bandwidth Control? From what I know the bandwidth control on the switch only refer to...

@Obrenner I have no idea.

@desperado Did you get any readings on the backup WAN before you have this issue? I have some different opinions with you. From my point of view, failover means primary WAN is linked up, and backup...

@HA4g3n It does have a newer version V5.0.5 released last month for EU version. If your device is EU version, you can go to TP-Link global website to download it and upgrade it....

@Obrenner There is a compatibility list. EAP660 has a plan to support mesh in next firmware. https://www.tp-link.com/en/omada-mesh/product-list/#omada-acces-points