D-Link DES-2108/E [53/199] Mac based vlans

24-port NWay Ethernet Switch User’s Guide

Switch Management 39

multiple 802.1Q-compliant switches through a single physical

connection and allows Spanning Tree to be enabled on all ports and

work normally.

MAC-based VLANs

The DES-3225G supports up to 12 MAC-based VLANs, which are

by their nature, limited to the switch itself and the devices

connected to it. Two key features inherent in MAC-based VLANs

are flexibility and security.

Since MAC addresses are hard-wired into a station’s network

interface card (NIC), MAC-based VLANs enable network managers

to move a station to a different physical location on the network

and have that station automatically retain its VLAN membership.

This provides the network with a high degree of flexibility since

even notebook PC’s can plug into any available port on a network

and communicate with the same people and use the same resources

that have been allocated to the VLAN in which it is a member.

MAC-based VLANs include groups of individual devices.

Communications can be restricted to only certain devices that are

members of a common VLAN. This provides a high degree of

security by allowing network managers to decide access rights on a

device-per-device basis.

Setting up MAC-based VLANs is a relatively straight-forward

process. Simply create the VLAN by assigning it a name

(description) and add MAC addresses for the stations that will be

members.

Port-based VLANs

The DES-3225G supports up to 96 port-based VLANs. Port-based

VLANs limit traffic that flows into and out of switch ports. Thus,

all devices connected to a port are members of the VLAN(s) the port

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