ZyXEL ES-3148 Guida Utente

 Chapter 7 Basic Setting

ES-3148 User’s Guide

A VLAN (Virtual Local Area Network) allows a physical network to be partitioned into 
multiple logical networks. Devices on a logical network belong to one group. A device can 
belong to more than one group. With VLAN, a device cannot directly talk to or hear from 
devices that are not in the same group(s); the traffic must first go through a router.
In MTU (Multi-Tenant Unit) applications, VLAN is vital in providing isolation and security 
among the subscribers. When properly configured, VLAN prevents one subscriber from 
accessing the network resources of another on the same LAN, thus a user will not see the 
printers and hard disks of another user in the same building. 
VLAN also increases network performance by limiting broadcasts to a smaller and more 
manageable logical broadcast domain. In traditional switched environments, all broadcast 
packets go to each and every individual port. With VLAN, all broadcasts are confined to a 
specific broadcast domain. 

"

VLAN is unidirectional; it only governs outgoing traffic.

See 

 for information on port-based and 802.1Q tagged VLANs. 

Click Basic Setting and then Switch Setup in the navigation panel to display the screen as 
shown. The VLAN setup screens change depending on whether you choose 802.1Q or Port 
Based in the VLAN Type field in this screen. Refer to the chapter on VLAN.

End Date

Configure the day and time when Daylight Saving Time ends if you selected 

Daylight Saving Time. The time field uses the 24 hour format. Here are a couple 

of examples:
Daylight Saving Time ends in the United States on the first Sunday of November. 

Each time zone in the United States stops using Daylight Saving Time at 2 A.M. 

local time. So in the United States you would select First, Sunday, November and 

2:00.
Daylight Saving Time ends in the European Union on the last Sunday of October. 

All of the time zones in the European Union stop using Daylight Saving Time at the 

same moment (1 A.M. GMT or UTC). So in the European Union you would select 

Last, Sunday, October and the last field depends on your time zone. In Germany 

for instance, you would select 2:00 because Germany's time zone is one hour 

ahead of GMT or UTC (GMT+1). 

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch 

loses these changes if it is turned off or loses power, so use the Save link on the 

top navigation panel to save your changes to the non-volatile memory when you 

are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Table 10   Basic Setting > General Setup  (continued)