Hello,
In this type of configuration, where inter-VLAN routing is handled by your router, you generally don’t need to create network interfaces on the TSW202 for each VLAN unless you specifically want the switch’s management interface to be reachable within those VLANs.
In your scenario, assuming all tagged VLANs (10, 20, 30) along with their respective DHCP servers or static configurations are created and managed on the router, you would only need to configure VLAN instances for the required ports on the TSW202 and define how those ports handle tagged and untagged traffic (trunk or access).
For more detailed guidance, you might find this discussion helpful as it covers a similar use case: RUT241 + TSW212 VLAN not working
Feel free to reach out if any further questions come up or if you need assistance with configuration.
Best regards,