Publication date: August, 2012
Revision 1.0
11
2-2.2 NTP
NTP is Network Time Protocol and is used to sync the network time based Greenwich Mean
Time (GMT). If the NTP mode was used 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 with the local time, otherwise, you will not be able to get the correct time.
The switch supports configurable time zone from –12 to +13 steps 1 hour.
Default Time zone: +8 Hrs.
Web Interface
To configure Time in the web interface:
1. Click SYSTEM, NTP.
2. Specify the Time parameter in manual parameters.
3. Click Save.
Figure 2-2.2: The NTP configuration
Parameter description:
Server 1 to 5 :
Provide the NTP IPv4 or IPv6 address of this switch. IPv6 address is in 128-bit
records represented as eight fields of up to four hexadecimal digits with a colon
separated each field (:). For example, 'fe80::215:c5ff:fe03:4dc7'. The symbol
'::' is a special syntax that can be used as a shorthand way of representing
multiple 16-bit groups of contiguous zeros; but it can only appear once It can
also represent a legally valid IPv4 address. For example, '::192.1.2.34'.
Buttons
These buttons are displayed on the NTP page:
Save – Click to save changes.
Reset - Click to undo any changes made locally and revert to previous saved
values.
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