ZyXEL ES-315 User Guide - Page 49
Introduction to VLANs, 6.5 Switch Setup Screen, Basic Setting, Switch Setup
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Chapter 6 Basic Setting Table 8 Basic Setting > General Setup (continued) LABEL DESCRIPTION New Date (yyyy- Enter the new date in year, month and day format. The new date then appears in mm-dd) 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. 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. " 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. ES-315/ES-315-F User's Guide 49