@MikeW1 I can't see there is any method to do port mirror on the Omada Controller. However I found an article that is very similar to your requirement So you will need to rules. One is to allow the...

@Spiker15 You need to upgrade the firmware. Only new firmware support VPN IP pool to be the same subnet as router's LAN

@MauriceGee Both can work. If you use Backup/Restore, you just need to re-adopt the oamda devices via the username/password.

@TSK-IT I don't think it will work. The router does not support RSTP on LAN ports. There will be a loop, and the switch can only use Loop Detection to block the data traffic to one of the router's...

@AbdulAdil It's hard to say, maybe compatible issue, maybe the router's issue. You can try to contact local tplink support and update result here.

@.AT I think it could be a hardware issue. I do not have 10G switch but it looks like the same issue as my old unmanaged switch. When I replaced the switch, everything went to fine.