I'm trying to connect 4 networks with 1 router, i created 2 sub-interfaces in the router, when i tried to create the 3rd sub-interface i got this output "%Cannot create sub-interface", this is my topology: https://i.gyazo.com/0d7939a1116e10e3792fe5fd843e35d7.png
This is my Router's configuration:
hostname Router ! ip cef ip ipv6 cef ! spanning-tree mode pvst ! interface GigabitEthernet0/0/0 no ip address duplex auto speed auto ! interface GigabitEthernet0/0/0.10 encapsulation dot 1Q 10 ip address 10.1.1.254 255.255.255.0 ! interface GigabitEthernet0/0/1 no ip address duplex auto speed auto ! interface GigabitEthernet0/0/1.20 no ip address ! interface GigabitEthernet0/0/2 no ip address duplex auto speed auto shutdown ! interface GigabitEthernet0/1/0 swithport mode access switchport nonegotiate ! ! interface GigabitEthernet0/1/1 swithport mode access switchport nonegotiate ! ! interface GigabitEthernet0/1/2 swithport mode access switchport nonegotiate ! ! interface GigabitEthernet0/1/3 swithport mode access switchport nonegotiate ! interface Vlan1 no ip address ! ip classless ! ip flow-export version 9 ! line con 0 ! line aux 0 ! line vty 0 4 login ! end
I need to create 4 networks, each network has a unique VLAN. And add default gateway to each VLAN to make the PC's communicate with each other. I know it's much better to put 1 network only and separate the VLAN's by 1 switch. But i want to use more interfaces in a Router, than Switches.