You have to create sub-interfaces on the router to route between different VLANs these sub-interfaces do not correspond to the VLANs so you could put any number but for manageability usually people use the same sub-interface has the VLAN ID. VLAN 1 which is the native VLAN, VLAN 2 and VLAN 3 (which is called "Support").
#Router on a stick feature Pc
If you look at the network topology below you can see where Cisco came up with the name "Router on Stick" each PC is on its own network and needs the router in order for traffic to pass between the networks. If you like to understand how create VLANs on a switch follow the post above.
I have already configured the Cisco switch as posted in Creating VLANs but in summary I have three VLANs total VLAN 1 which is the native VLAN, VLAN 2 and VLAN 3 (which is called support. By having VLANs you are segmenting the network and the only way to get to the other side is having a router.
A while ago I talked about putting different VLANs on a switch, remember a VLAN is virtual network that although physically it may look like on the same network that does not always mean the case.
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