H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 115)

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Configuring the system time
Configure a correct system time so that the device can work with other devices correctly. System time
allows you to display and set the device system time, system time zone, and daylight saving time on the
Web interface.
You can set the system time using manual configuration or automatic synchronization of NTP server time.
Changing the system clock on each device within a network is time-consuming and does not guarantee
clock precision.
Defined in RFC 1305, the Network Time Protocol (NTP) synchronizes timekeeping among distributed
time servers and clients.
NTP can keep consistent timekeeping among all clock-dependent devices within the network so that the
devices can provide diverse applications based on consistent time. For a local system running NTP, it can
synchronize, be synchronized by, or mutually synchronize with other clocks.
Configuration guidelines
• A device can act as a server to synchronize the clock of other devices only after its clock has been
synchronized. If the clock of a server has a stratum level higher than or equal to that of a client's
clock, the client will not synchronize its clock to the server's clock.
• Because the synchronization process takes a period of time, the clock status may be displayed as
unsynchronized after your configuration. Refresh the page to update the clock status.
• If the system time of the NTP server is ahead of the system time of the device, and the difference
between them exceeds the Web idle time specified on the device, all online Web users are logged
out because of timeout.
Displaying the system time
1. Select Device > System Time from the navigation tree.
The page for configuring system time appears.
Figure 55 Displaying the system time
2. View the current system time on the top of the page.