Our network admin wants to segment our data center into separate networks and vlans. For example Domain Controllers would be 10.1.1.0 255.255.255.0 and vlan 100, File and print servers would be 10.1.2.0 255.255.255.0 and vlan 110, and Application servers would be 10.1.3.0 255.255.255.0 and Vlan 120. They are all connected into a Layer 3 Catalyst switch.
What I would like to know if why does every group have it's own vlan if it sitting on it's own network segment? Wouldn't the layer3 routing prevent broadcasts and chatty protocols from flooding all the networks.
What are the advantages of using layer 3 switching and vlans at the same time.
He cannot explain why but that it needs to be done.
Thanks for your advise.