Extreme networks Summit1 Manuale Utente

5-2

S

UMMIT

 S

WITCH

 I

NSTALLATION

 

AND

 U

SER

 G

UIDE

V

IRTUAL

 LAN

S

 (VLAN

S

)

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 traffic must cross a routing device.

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, LLC SAP, or LLC/SNAP Ethernet protocol type

A combination of these criteria

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 : 5VLAN.FM  Page 2  Thursday, June 18, 1998  9:27 AM