Chapter 8 Basic Setting

Table 11

Basic Setting > General Setup (continued)

LABEL

 

DESCRIPTION

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 last Sunday of

 

 

October. 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.

 

 

 

8.4 Introduction to VLANs

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 on the same network.

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.

Note: VLAN is unidirectional; it only governs outgoing traffic.

See Chapter 9 on page 119 for information on port-based and 802.1Q tagged VLANs.

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XGS4700-48F User’s Guide