Draytek VigorSwitch G2080, Руководство пользователя, Страница: 34 / 120

VigorSwitch G2080 User’s Guide 28
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The switch provides manual and automatic ways to set the system time via NTP. Manual
setting is simple and you just input “Year”, “Month”, “Day”, “Hour”, “Minute” and
“Second” within the valid value range indicated in each item. If you input an invalid value,
for example, 61 in minute, the switch will clamp the figure to 59.
NTP is a well-known protocol used to synchronize the clock of the switch system time over
a network. NTP, an internet draft standard formalized in
RFC 1305
, has been adopted on the
system is version 3 protocol. The switch provides four built-in NTP server IP addresses
resided in the Internet and an user-defined NTP server IP address. The time zone is
Greenwich-centered which uses the expression form of GMT+/- xx hours.
Function name:
Time
Function description:
Set the system time by manual input or set it by syncing from Time servers. The function
also supports daylight saving for different area’s time adjustment.
Parameter description:
Current Time: Show the current time of the system.
Manual: This is the function to adjust the time manually. Filling the
valid figures in the fields of Year, Month, Day, Hour,
Minute and Second respectively and press
<Apply> button,
time is adjusted. The valid figures for the parameter Year,
Month, Day, Hour, Minute and Second are >=2000, 1-12,
1-31, 0-23, 0-59 and 0-59 respectively. Input the wrong
figure and press
<Apply> button, the device will reject the
time adjustment request. There is no time zone setting in
Manual mode.
Default: Year = 2000, Month = 1, Day = 1
Hour = 0, Minute = 0, Second = 0
NTP: NTP is Network Time Protocol and is used to sync the
network time based Greenwich Mean Time (GMT). If use
the NTP mode and select a built-in NTP time server or
manually specify an user-defined NTP server as well as
Time Zone, the switch will sync the time in a short after
pressing
<Apply> button. Though it synchronizes the time
automatically, NTP does not update the time periodically
without user’s processing.
Time Zone is an offset time off GMT. You have to select the
time zone first and then perform time sync via NTP because
the switch will combine this time zone offset and updated
NTP time to come out the local time, otherwise, you will not
able to get the correct time. The switch supports
configurable time zone from –12 to +13 step 1 hour.
Default Time zone: +8 Hrs.
Daylight Saving: Daylight saving is adopted in some countries. If set, it will
adjust the time lag or in advance in unit of hours, according
to the starting date and the ending date. For example, if you
set the day light saving to be 1 hour. When the time passes