How do I configure the T2600 switch so that the IP address is assigned by my router?

Hello everyone ! I'm writting here today because i feel a little bit uncomfortable with the VLANs on the T1600G-52TS. I would like here to separate my 48 ports switch into 3 VLANs of 12 ports. I would

Created two VLANs separating two pc’s. Both have access to the internet but I can no longer connect to the gui from either PC. I have to plug into an open port with a laptop. The router is connected t