Black Box LPB2910A, User Manual

Page: 22 / 367

Publication date: Sept, 2015
Revision A1
10
2-­‐1.3 NTP
NTP is Network Time Protocol and is used to sync the network time based Greenwich Mean Time
(GMT). If you 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 after you press the
<Apply> button. Though it synchronizes the time automatically, NTP does not update the time
periodically without the user’s processing.
Time Zone is an offset time of 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 get the local
time; otherwise, you will not able to get the correct time. The switch supports configurable time
zones from –12 to +13 step 1 hour.
Default Time zone: +8 Hrs.
Web Interface
To configure NTP in the web interface:
1. Click Configuration, System, NTP.
2. Specify the Time parameter manually.
3. Click Apply.
Figure 2-­‐1.3: The NTP configuration
Parameter description:

Mode:
Indicates the NTP mode operation. Possible modes are:
Enabled: Enable NTP client mode operation.
Disabled: Disable NTP client mode operation.

Server 1 to 5:
Provide the NTP IPv4 or IPv6 address of this switch. The IPv6 address is in a 128-­‐bit record
represented as eight fields of up to four hexadecimal digits with a colon separating each field (:).
For example, “fe80::215:c5ff:fe03:4dc7”. The symbol “::” is a special syntax that you can use 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”.