I am a newbie to vlan's, and I am just looking to get the Vlan 101 overview. We have always used a big flat network, everyone on a 192.168.x.x 255.255.0.0 network. As we start to look at making the network cleaner, I am just looking for a simplistic reply. We would have an outside company coming in to set this up for us, but I just want to see if I can take what I know about vlan's, and the answer I get here, to at least have a little better understanding. I am going to use a simplistic example, loosely related to our overall setup.
We have 2 Buildings, Building A, and Building B. In Building A, we have 10 staff in Group 1 and 20 staff in Group 2. In Building B we have 20 staff in Group 3 and an additional 15 staff in Building B that belong to Group 1 from Building A. The buildings are connected with fiber, both buildings have 2 3com 48 port 5500G POE switches, and Building B connects to the Internet gateway that comes into Building A. I would want each group to be in their own Vlan, say Group 1 in Vlan 2, Group 2 in Vlan 4, Group 3 in Vlan 6. Internet connection goes into a firewall device in Building A that all users share. So, all users in Building B would route their Internet requests through Building A. Feel free to assign your own IP address ranges to all devices, etc..
I appreciate your replies! Thank you!