Enhancements in Release F.02.02

New Time Synchronization Protocol Options

TimeP Time Synchronization

You can either manually assign the switch to use a TimeP server or use DHCP to assign the TimeP server. In either case, the switch can get its time synchronization updates from only one, designated Timep server. This option enhances security by specifying which time server to use.

SNTP Time SynchronizationSNTP provides two operating modes:

Broadcast Mode: The switch acquires time updates by accepting the time value from the first SNTP time broadcast detected. (In this case, the SNTP server must be configured to broadcast time updates to the network broadcast address. Refer to the documentation provided with your SNTP server application.) Once the switch detects a particular server, it ignores time broadcasts from other SNTP servers unless the configurable Poll Interval expires three consecutive times without an update received from the first-detected server.

Note

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 configured 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.

Overview: 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 Unicast

189