Configuration: Vlan - ZyXEL Communications GS1900-8 User Manual

20.1 Overview
This sect ion provides inform at ion for VLAN in Configur a t ion .
A VLAN ( Virt ual Local Area Net work) allows a physical net work t o be part it ioned int o m ult iple logical
net works. Devices on a logical net work belong t o one group. A device can belong t o m ore t han one
group. Wit h VLAN, a device cannot direct ly t alk t o or hear from devices t hat are not in t he sam e
group( s) ; t he t raffic m ust first go t hrough a rout er.
I n MTU ( Mult i-Tenant Unit ) applicat ions, VLAN is vit al in providing isolat ion and securit y am ong t he
subscribers. When properly configured, VLAN prevent s one subscriber from accessing t he net work
resources of anot her on t he sam e LAN, t hus a user will not see t he print ers and hard disks of
anot her user on t he sam e net work.
VLAN also increases net work perform ance by lim it ing broadcast s t o a sm aller and m ore
m anageable logical broadcast dom ain. I n t radit ional swit ched environm ent s, all broadcast packet s
go t o each and every individual port . Wit h VLAN, all broadcast s are confined t o a specific broadcast
dom ain.
20.1.1 What You Can Do in this Chapter
• The VLAN screen (
• The Guest VLAN screen (
Swit ch.
• The Voice VLAN screen (
of t he Swit ch.
C

Configuration: VLAN

Sect ion 20.2 on page 113) displays VLAN, port , and VLAN port set t ings.
Sect ion 20.3 on page
S ect ion 20.4 on page
GS1900 Series User's Guide
112
HAPTER
118) displays t he global and port set t ings of t he
120) displays t he global, OUI , and port set t ings
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