We are in the process of splitting our servers, printers and workstations into two networks and I would like to hear your thoughts.
Currently, our prinmary network is 10.20.102.0/24. We would like to keep our servers and printers on this network and move workstations to 10.20.104.0/24. As I understand it, I should be able to create a new VLAN with an IP such as 10.20.104.1, create a new DHCP scope on our windows server, then force the workstations to update their IPs. We have a layer 3 switch (Catylst 3560) that would handle routing the traffic between VLANs. Switchports with workstations connected would be configured with "switchport access vlan <104>". In my current knowledge on routing/switching, if you have a device on LAN A with an IP of 10.20.102.55 trying to communicate with a device on LAN B with an IP of 10.20.104.25, it would go to the gateway, since the device isn't on the same LAN, which would then route it to the next hop. What if these LANs are on the same physical network? How would these devices communicate? Also, how will the workstations get IPs from a server on a different network?
Network equipment:
Core Router == Cisco 2811 Router
Switches == 4 Cisco Catalyst 3560
Server:
IBM xSeries running Windows 2003
Workstations:
Windows XP
VLANS:
VLAN 10 == Data (10.20.102.1 -- all printers/workstations/servers)
VLAN 172 == Voice (172.20.102.1 -- phones, phone equipment)
Let me know if you need other information
