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Lantronix
SM24TBT2DPA and SM24TBT2DPB Web User Guide
2-1.3 NTP
NTP (Network Time Protocol) is used to sync the network time based Greenwich Mean Time (GMT).
If you select NTP mode and select a built-in NTP time server or manually specify a user-defined NTP
server and Time Zone, the switch will sync the time shortly after pressing the
Apply
button.
Although it synchronizes the time automatically, NTP does not update the time periodically without manual
processing.
Time Zone is an offset time of GMT. You 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 cannot get the correct time. The switch supports configurable time zones from
–12 to +13 in 1 hour steps. The default Time zone is +8 Hrs.
Web Interface
To configure NTP in the UI:
1. Click Configuration, System, NTP.
2. Specify the Time parameter in manual parameters.
3. Click Apply.
Figure 2-1.3: NTP Configuration page
Parameter descriptions:
Automatic:
Indicates the NTP mode of operation. Possible modes are:
Enabled
: Enable NTP client mode operation; NTP servers available from the DHCP.
Disabled
: Disable NTP client mode operation; NTP servers available from the config (default).
Server address via DHCP
: Specify a list of IP addresses indicating NTP servers available to the client.
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 separating 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 valid IPv4 address. For example, '::192.1.2.34'.
Buttons:
Apply
: Click to save changes.
Reset
: Click to undo any changes made locally and revert to previously saved values.