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DES-7200 Configuration Guide Chapter 5 VLAN Configuration
5-8
5 VLAN Configuration
This chapter describes how to configure IEEE802.1q VLAN.
5.1 Overview
Virtual Local Area Network (VLAN) is a logical network divided on a physical
network. VLAN corresponds to the L2 network in the ISO model. The division of
VLAN is not restricted by the physical locations of network ports. A VLAN has
the same attributes as a common physical network. Except for no restriction on
physical location, unicast, broadcast and multicast frames on layer 2 are
forwarded and distributed within a VLAN, not being allowed to directly go to
other VLANs.Therefore, when a host in a VLAN wants to communicate with
another host in another VLAN, a layer 3 device must be used, as shown in the
following diagram.
You can define a port as the member of a VLAN. All the terminals connected to
the specified port are part of the VLAN. A network can support multiple VLANs.
In this case, when you add, delete, and modify users in the VLANs, you do not
need to modify the network configuration physically.