N o t e

Time Protocols

Selecting a Time Synchronization Protocol or Turning Off Time Protocol Operation

To use Broadcast mode, the switch and the SNTP server must be in the same subnet.

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.

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:

SNTP: Broadcast or UnicastTimeP: DHCP or Manual

3.Configure the remaining parameters for the time protocol you selected.

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.

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:

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