Internet connection through different VLAN

Could someone help me here please.

Have a cisco SG500 2 (mode layer 3) configured with 3 VLAN connected to a modem adsl (Trendnet) - vlan voice 1 data, vlan 2, vlan 3 tests.  Routing between VLANs is ok I can ping any device in any vlan and have access to the internet through the vlan 1 but no internet access on the other vlan is the vlan 2 and 3. No ping to adsl, if I plugged in a device in the vlan 2 or 3. My question is do I have a router or firewall in order to provide internet access through all my VLAN or is it possible with the SG500 connected to adsl? a turn on ip Routing and the default route in my SG500, but still no luck. need internet connection for the PC as well as voip devices.

Thank you

Hi Paul, the switch performs no NAT function so if your modem is only a modem giving public IP addresses then you would need a router to support the NAT function and support the vlan or the static routes.

If your modem works as a router, need you a static route on the modem to point to the SVI to the switch to allow the clients of vlan connection to connect to the modem to turn, what makes the internet work.

-Tom
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