I would like to setup my two Cisco 3560 switches with separate subnets for workstations, servers, and VPN clients (ISA Server). The switches will be connected via a Cisco SFP Interconnect cable.
Do I need a VLAN for each subnet? If I setup 10.0.1.0, 10.0.2.0, and 10.0.3.0 I will need a subnet mask of 255.255.0.0 for each subnet to talk to each other, correct? How do I configure the switches to talk to each other using the cable? Is there a good guide to setting up the switches in this manner?
I really don't want overkill. I simply need to expand the range of IP addresses available to all computers, and segmenting by subnet makes the most sense to me. I am new to Cisco, so pointing me in the right direction is all I ask.