I have 6 Catalyst 2950 switches that I am planning on configuring with 5 VLANS( VTP, Trunking, logical interfaces with separate subnets have been configured on the Router). The only clarification that I need is if I have to configure each VLAN with a separate subnet and if so where do I assign the ip subnet to the VLAN?
Thanks in advance.
Yes you are correct that the encapsulation command on the logical inteface does specify the ID of the VLAN. This is how the assignment of subnet to VLAN takes place.
The configuration you want is called router on a stick. You configure trunk on the uplink port between your switch and your router.
Then you must have trunk encapsulation on your router and its on the router you assign subnets to your subinterfaces.
On the switch you configure the same vlan on the ports that belongs to the same subnet.
In short the vlan - subnet configuration is done at your router.
Do no hesitate to post a new question if you want config examples!