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Planning to move away from current flat topology with /24 scheme (we're running out of IPs) to subnetted /22. &nbsp;Using the 3com 3870 as core switch/router. &nbsp;The goal is to have 4 /24 subnets:<br />
10.2.0.0 /24 = VLAN 10-Servers<br />
10.2.1.0 /24 = VLAN 20-Finance<br />
10.2.2.0 /24 = VLAN 30-Development<br />
10.2.3.0 /24 = VLAN 40-Administration<br />
Using one DHCP server in VLAN 10 with routing between VLAN 10 and all others but no routing between VLANs 20 thru 40.<br />
Given the above, how would I control the VLAN routing and how would I ensure that each subnet PC get's its proper IP info from DHCP?<br />

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Planning to move away from current flat topology with /24 scheme (we're running out of IPs) to subnetted /22.  Using the 3com 3870 as core switch/router.  The goal is to have 4 /24 subnets:
10.2.0.0 /24 = VLAN 10-Servers
10.2.1.0 /24 = VLAN 20-Finance
10.2.2.0 /24 = VLAN 30-Development
10.2.3.0 /24 = VLAN 40-Administration
Using one DHCP server in VLAN 10 with routing between VLAN 10 and all others but no routing between VLANs 20 thru 40.
Given the above, how would I control the VLAN routing and how would I ensure that each subnet PC get's its proper IP info from DHCP?


VLAN Configuration on 3Com 3870

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

Network design and methodology, also known as network architecture, is the design of a communication network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats used in its operation. In telecommunication, the specification of a network architecture may also include a detailed description of products and services delivered via a communications network, as well as detailed rate and billing structures under which services are compensated.