Hello Mahmoudkdry, In order to prevent us from starting to "imagine things" and you from wasting your time ;-), it would be very beneficial to each other if you can tell us the make and model of those switches and router. (You might want to do something that isn't possible with them... ) This way our help will be much more precise and concise. Please post back. ---------------------------------- a Quick, generic set-up could go something like: - Switch1 for VLAN 1 - All ports as Access (untagged) on VLAN 1 - Link to Switch 3 can either be either Access (untagged) or trunk link (tagged) - Switch2 for VLAN 2 - All Ports as Access (untagged) on VLAN 2 - Link to Switch 3 can be Access (untagged) or trunk (tagged) - Switch 3 - Port that Switch1 comes in on can be untagged for VLAN1 to allow proper traffic flow or Set the Link to tagged (trunk) port for VLAN communication - Set the Port that Switch 2 connects with as either a trunk (tagged) port, or untagged (access) port on VLAN 2 - The port connecting to the router could be a tagged port - to allow for BOTH VLANs to pass traffic to it - Router - If possible, set up either subinterfaces on the link coming from Switch 3 to support the VLANs on Switches 1 and 2, or If your router has several ports (like most SonicWalls), set up a port for each VLAN, and run 2 links from Switch 3 to the router, one for each VLAN /Switch connection Hope that was generic enough and clear as mud for you... :)

Hello Mahmoudkdry, In order to prevent us from starting to "imagine things" and you from wasting your time ;-), it would be very beneficial to each other if you can tell us the make and model of those switches and router. (You might want to do something that isn't possible with them... ) This way our help will be much more precise and concise. Please post back. ---------------------------------- a Quick, generic set-up could go something like: - Switch1 for VLAN 1 - All ports as Access (untagged) on VLAN 1 - Link to Switch 3 can either be either Access (untagged) or trunk link (tagged) - Switch2 for VLAN 2 - All Ports as Access (untagged) on VLAN 2 - Link to Switch 3 can be Access (untagged) or trunk (tagged) - Switch 3 - Port that Switch1 comes in on can be untagged for VLAN1 to allow proper traffic flow or Set the Link to tagged (trunk) port for VLAN communication - Set the Port that Switch 2 connects with as either a trunk (tagged) port, or untagged (access) port on VLAN 2 - The port connecting to the router could be a tagged port - to allow for BOTH VLANs to pass traffic to it - Router - If possible, set up either subinterfaces on the link coming from Switch 3 to support the VLANs on Switches 1 and 2, or If your router has several ports (like most SonicWalls), set up a port for each VLAN, and run 2 links from Switch 3 to the router, one for each VLAN /Switch connection Hope that was generic enough and clear as mud for you... :)