Allied Telesis AT-S21 - Manual (Page 50)

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3-18
The number of configurable VLANs depends on the switch’s port
count, including the RS232 management port and any optional
uplink ports. The AT-8118 and AT-8118XL each have 16 base ports,
with none, one, or two optional uplink ports, for a total count of 16,
17, or 18 ports. The AT-8124XL has 24 ports. The AT-8126XL has 24
base ports wih none, one, or two optional uplink ports, for a total
count of 24, 25, or 26 ports.
Advantages of Using VLANs
❑ You have the flexibility of grouping workstations logically or
functionally, regardless of their physical location on the
network.
❑ You can change VLAN memberships anytime by software
configuration without moving the workstations physically, or
change group memberships by simply moving a cable from
one port to another.
The examples used in the procedures that follow will illustrate a
simple yet practical way of “splitting” a 24-port switch into two
virtual switches by configuring two VLANs.
In these procedures, you will:
❑ Configure a 24-port switch into two VLANs, East and West.
❑ Assign ports 1-12 to East and ports 13-25 to West. The RS232
management port is Port 25.
To view the ports’ default VLAN configuration, select Virtual
LANs>Port to VLAN configuration . The screen shows all
ports belonging to Default VLAN. See Figure 3-7 for an example of
the list (partially shown).
Figure 3-7 Switch Ports’ Default VLAN Configuration