Introduction To Vlans - ZyXEL Communications GS3700 Series User Manual

Table 12 Basic Set t ing > General Set up ( cont inued)
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6.3 Introduction to VLANs

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.
Not e: VLAN is unidirect ional; it only governs out going t raffic.
See Chapt er 7 on page 101
6.4 Switch Setup
Click Ba sic Se t t ing > Sw it ch Se t up in t he navigat ion panel t o display t he screen as shown. The
VLAN set up screens change depending on whet her you choose 802.1Q or Port Based in t he VLAN
Type field in t his screen ( in St andalone m ode) . Refer t o t he chapt er on VLAN.
Chapter 6 Basic Setting
DESCRIPTION
Click Apply t o save your changes t o t he Swit ch's run- t im e m em ory. The Swit ch loses
t hese changes if it is t urned off or loses power, so use t he Sa ve link on t he t op
navigat ion panel t o save your changes t o t he non- volat ile m em ory when you are done
configuring.
Click Ca nce l t o begin configuring t his screen afresh.
for inform at ion on port- based and 802.1Q t agged VLANs.
GS3700/XGS3700 Series User's Guide
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