About Vlans; Types Of Vlans; Port Group Vlans - 3Com LANPLEX 2500 EXTENDEDPLEX®2500 EXTENDED User Manual

VLAN
S ON THE
2
LAN S
®
PLEX YSTEM
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