Introduction To Vlans - ZyXEL Communications MES3500-24S User Manual

Table 11 Basic Setting > General Setup (continued)
LABEL
Time Server
Address
Current Time
New Time
(hh:min:ss)
Current Date
New Date (yyyy-
mm-dd)
Time Zone
Daylight Saving
Time
Start Date
End Date
Apply
Cancel

8.3 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.
Chapter 8 Basic Setting
DESCRIPTION
Enter the IP address or domain name of your timeserver. You can enter up to three time server
addresses. The Switch tries to synchronize with the first server. If the synchronization fails, then
the Switch goes through the rest of the list in order.
The Switch attempts to connect to the timeserver for up to 60 seconds. If you specify a
timeserver that is unreachable, then this screen will appear locked for 60 seconds. Please wait.
This field displays the time you open this menu (or refresh the menu).
Enter the new time in hour, minute and second format. The new time then appears in the
Current Time field after you click Apply.
This field displays the date you open this menu.
Enter the new date in year, month and day format. The new date then appears in the Current
Date field after you click Apply.
Select the time difference between UTC (Universal Time Coordinated, formerly known as GMT,
Greenwich Mean Time) and your time zone from the drop-down list box.
Daylight saving is a period from late spring to early fall when many countries set their clocks
ahead of normal local time by one hour to give more daytime light in the evening.
Select this option if you use Daylight Saving Time.
Configure the day and time when Daylight Saving Time starts if you selected Daylight Saving
Time. The time is displayed in the 24 hour format. Here are a couple of examples:
Daylight Saving Time starts in most parts of the United States on the second Sunday of March.
Each time zone in the United States starts using Daylight Saving Time at 2 A.M. local time. So in
the United States you would select Second, Sunday, March and 2:00.
Daylight Saving Time starts in the European Union on the last Sunday of March. All of the time
zones in the European Union start using Daylight Saving Time at the same moment (1 A.M. GMT
or UTC). So in the European Union you would select Last, Sunday, March 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).
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).
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.
Click Cancel to begin configuring this screen afresh.
MES3500-24S/MGS3520 Series User's Guide
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