5-2
S
UMMIT
S
WITCH
I
NSTALLATION
AND
U
SER
G
UIDE
V
IRTUAL
LAN
S
(VLAN
S
)
¥ VLANs provide extra security.
Devices within each VLAN can only communicate with member devices in the same
VLAN. If a device in VLAN
Marketing
must communicate with devices in VLAN
Sales
, the trafÞc must cross a routing device.
¥ VLANs ease the change and movement of devices.
With traditional networks, network administrators spend much of their time dealing
with moves and changes. If users move to a different subnetwork, the addresses of
each endstation must be updated manually.
For example, with a VLAN, if an endstation in VLAN
Marketing
is moved to a port
in another part of the network, and retains its original subnet membership; you must
only specify that the new port is in VLAN
Marketing
.
T
YPES
OF
VLAN
S
The Summit supports a maximum of 256 VLANs. Summit VLANs can be created
according to the following criteria:
¥
Physical port
¥
802.1Q tag
¥
Ethernet protocol type
¥
A combination of these criteria
P
ORT
-B
ASED
VLAN
S
In a port-based VLAN, a VLAN name is given to a group of one or more ports on the
Switch. A Switch port can be a member of only one port-based VLAN.
SUMMIT.BK Page 2 Thursday, September 25, 1997 12:33 PM
