@gregoryh I am trying to reproduce the problem you are experiencing. If the controller has multiple sites, you cannot delete it directly and you must delete all the sites before deleting the...

@SamoG Please refer to this guide to know how to install the Omada SDN Controller on the Linux system: https://www.tp-link.com/support/faq/3272/ You can first download the firmware from our official...

@CoKro Does your router support multi-net NAT (or multi-nets network)? This is the most important thing to confirm. If it does, you can set up a multi-net network using this guide:...

@JP_D Please confirm if the Ethernet cable is of good quality.

@BvanDiermen What is your ER7206's firmware version? Also, could you provide information about your network topology?

@ceejaybassist Can you confirm whether Wired clients are assigned IPv6 addresses? Can IPv6 addresses be displayed for wireless clients? Is your router an Omada router?