@Rojoone2 If your ER6020 is version 2, I think just need to set up the VLAN on switch and router. If you still need to isolate wireless client, you need to set up multi-SSID. Suppose that your main...

@ksxour Save your configuration and try to reset your router. If still has the problem, you can check the ARP table for R470T+ and its gateway. It's for confirming has not IP conflict. For R470T+,...

@PeterS Not use VLAN assignment and use MAC-VLAN? Maybe it can work as you want.

@11thPlague It's a good way to use 192.168.0.0/16 to merge different subnets. It's also reasonable that local subnet cannot overlap remote subnet. Suppose the local subnet is LAN, when router receive...

VLAN Assignment is port-based so you cannot use MAC-based for port-method. Just found a CG for tplink 802.1x....

T1600G-52TS V3 should be not able to upgrade to V4. They may change the hardware so the V4 firmware cannot be shared.