ZyXEL Communications ES-315, Руководство пользователя

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Chapter 6 Basic Setting
ES-315/ES-315-F User’s Guide
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6.4 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 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.
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VLAN is unidirectional; it only governs outgoing traffic.
See Chapter 7 on page 57 for information on 802.1Q tagged VLANs.
6.5 Switch Setup Screen
Click Basic Setting and then Switch Setup in the navigation panel to display the screen as
shown. This screen allows you to set priority levels on the Switch. Refer to the chapter on
VLAN.
New Date (yyyy-
mm-dd)
Enter the new date in year, month and day format. The new date then appears in
the Current Date field after you click Apply .
Time Zone 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.
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 8 Basic Setting > General Setup (continued)
LABEL DESCRIPTION