@Stryk3rr3al Hi, hope this can help you: And check this to learn more about the VLAN: How to configure 802.1Q VLAN

@unkn0wn So you mean the ER7212PC as an OpenVPN client connecting to the server? Have you tried importing the ovpn file into a PC to test if the server is running? If you try to ping the OpenVPN...

@ZoeyC Hi, did you test the ethernet cable within your network? Tried to put the Mesh AP close to the Root AP for testing.

@arrmo ER7206 supports setting Custom DNS, can it meet your needs? Sorry for any wrong information, I haven't tried using Cloudflare yet.

@arrmo Hi, does it really affect the usage of your network? Maybe it is a client's behavior.

@Bogdanovic Hi, did you set the default gateway on the devices? If you don't use a router, you need to set the default gateway manually.