@linkerman Is your ER605 on the same subnet as the controller? If the router and the controller are not on the same network, you may need to check the ports and make sure all required ports are...

@yorkman The last time I saw this error, I just simple rebooted the PC and then all work. You may also check is there any anti-virus or firewall on your PC and disable it for temporary test.

@charliestevens That's normal. Software controller needs to re-adopt the devices because it lost connection to the devices before. Most of the configurations can work without Controller, but a few of...

@lcmm It seems like ISP did not response to the request. If you are using this tplink router to replace your old router? If so, try reboot the Modem.(I suspect ISP modem recorded old router's MAC...

@Matzzz 1G is good enough for most of the cases. If you want more, you can buy a 2.5G/10G port switch. However your main router also need to supports 2.5G/10G, or at least LACP(link aggregation). I...

@Pro8613 Hi, I had a similar system before(not in use now), just the model difference. I had two R600VPN set up site2site IPSec VPN(like your firewwall), and they are both behind ISP modem router. So...