Protocol Operation; General Steps For Running A Time Protocol On The Switch:; Disabling Time Synchronization - HP ProCurve 6120G/XG Configuration Manual

Time Protocols
Selecting a Time Synchronization Protocol or Turning Off Time Protocol Operation
N o t e
To use Broadcast mode, the switch and the SNTP server must be in the same
subnet.
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Selecting a Time Synchronization
Protocol or Turning Off Time Protocol
Operation

General Steps for Running a Time Protocol on the Switch:

1. Select the time synchronization protocol: SNTP or TimeP (the default).
2. Enable the protocol. The choices are:
3. Configure the remaining parameters for the time protocol you selected.
Note that simply selecting a time synchronization protocol does not enable
that protocol on the switch unless you also enable the protocol itself (step 2,
above). For example, in the factory-default configuration, TimeP is the
selected time synchronization method. However, because TimeP is disabled
in the factory-default configuration, no time synchronization protocol is
running.

Disabling Time Synchronization

You can use either of the following methods to disable time synchronization
without changing the Timep or SNTP configuration:
9-4
Unicast Mode: The switch requests a time update from the config­
ured SNTP server. (You can configure one server using the menu
interface, or up to three servers using the CLI sntp server command.)
This option provides increased security over the Broadcast mode by
specifying which time server to use instead of using the first one
detected through a broadcast.
• SNTP: Broadcast or Unicast
• TimeP: DHCP or Manual
The switch retains the parameter settings for both time protocols even if
you change from one protocol to the other. Thus, if you select a time
protocol, the switch uses the parameters you last configured for the
selected protocol.