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2
VLANS ON THE
LAN
PLEX
®
SYSTEM
This chapter contains:
■ A description of Virtual LAN (VLAN) concepts and their operational aspects
in the LANplex® 2500 system
■ Examples of VLAN configurations
About VLANs The VLAN concept in LAN technology helps minimize broadcast and
multicast traffic. It also makes end-station moves, adds, and changes easier
for the network administrator.
In the LANplex system, VLANs allow you to:
■ Create independent broadcast domains to optimize network performance
and create firewalls
■ Form flexible user groups independent of the users’ physical network
location
Types of VLANs You can use several types of VLANs to group users. These types include:
■ Port group VLANs
■ MAC address group VLANs
■ Application-oriented VLANs
■ Protocol-sensitive VLANs
Port Group VLANs
Port group VLANs group together one or more switch ports. This simple
implementation of VLANs requires little configuration. All frames received
on a port are grouped together. For example, all frames received on a port
that is part of a port group are kept within that port group, regardless of