D-Link DES-3326S manual Vlan Layout, 169

DES-3326S Layer 3 Fast Ethernet Switch User’s Guide

4.Determine how each subnet will communicate with the WAN or Internet. Again, static routes should be determined and default gateways identified.

5.Develop a security scheme. Some subnets on the network need more security or should be isolated from the other subnets. IP or MAC filtering can be used. Also, one or more VLANs on the Layer 3 switch can be configured without an IP subnet – in which case, these VLANs will function as a layer 2 VLAN and would require an external router to connect to the rest of the network.

6.Develop a policy scheme. Some subnets will have a greater need for multicasting bandwidth, for example. A policy is a mechanism to alter the normal packet forwarding in a network device, and can be used to intelligently allocate bandwidth to time-critical applications such as the integration of voice, video, and data on the network.

7.Develop a redundancy scheme. Planning redundant links and routes to network critical resources can save valuable time in case of a link or device failure. The DES-3326S Spanning Tree function can be used to block the redundant link until it is needed.

VLAN Layout

VLANs on the DES-3326S have rather more functions than on a traditional layer 2 switch, and must therefore be laid-out and configured with a bit more care. Layer 3 VLANs (VLANs with an IP interface assigned to them) could be thought of as network links – not just as a collection of associated end users. Further, Layer 3 VLANs are assigned an IP network address and subnet mask to enable IP routing between them.

Web-Based Switch Management 169