I have a Cisco SG350 that I am trying to configure for my domestic network. There is just one thing that I am not able to do, and I would like to know if you can help me out why and how to fix. So my problem is: I have a NAS in vlan 30 and a PC in vlan 20. My PC cannot ping or access the NAS. My switch, however, can ping it from vlan 30 interface, but cannot ping it from any other vlan. My vlans are all created in the firewall/router that is acting as the gateway for the SG350. From firewall to SG350 I have trunk ports configured. I thought that because I have IP routing enabled in the switch, the inter vlan routing would happen naturally, but it does not seem to be true.   Thanks for the help!   This is the config that I have on the switch: config-file-header switch6a6d71 v2.5.0.83 / RTESLA2.5_930_364_091 CLI v1.0 file SSD indicator plaintext @ ! unit-type-control-start unit-type unit 1 network gi uplink none unit-type-control-end ! vlan database vlan 10,20-21,30 exit voice vlan oui-table add 0001e3 Siemens_AG_phone________ voice vlan oui-table add 00036b Cisco_phone_____________ voice vlan oui-table add 00096e Avaya___________________ voice vlan oui-table add 000fe2 H3C_Aolynk______________ voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phone voice vlan oui-table add 00d01e Pingtel_phone___________ voice vlan oui-table add 00e075 Polycom/Veritel_phone___ voice vlan oui-table add 00e0bb 3Com_phone______________ bonjour interface range vlan 1 hostname switch6a6d71 username fabio password encrypted 8006c3b9215a15248f77214fca75f423a57a98a6 privilege 15 ! interface vlan 10 name mngt ip address 10.1.0.2 255.255.255.248 ! interface vlan 20 name user ip address 10.0.1.2 255.255.255.0 ! interface vlan 21 name wireless ip address 10.0.2.2 255.255.255.0 ! interface vlan 30 name dmz ip address 10.0.0.2 255.255.255.0 ! interface GigabitEthernet1 switchport access vlan 20 ! interface GigabitEthernet2 switchport access vlan 20 ! interface GigabitEthernet3 switchport access vlan 20 ! interface GigabitEthernet4 switchport access vlan 20 ! interface GigabitEthernet5 switchport access vlan 20 ! interface GigabitEthernet6 switchport access vlan 20 ! interface GigabitEthernet7 switchport access vlan 30 ! interface GigabitEthernet8 switchport access vlan 30 switchport trunk native vlan none ! interface GigabitEthernet9 switchport mode trunk ! interface GigabitEthernet10 switchport mode trunk ! exit ip default-gateway 10.0.1.1 ... View more