HP procurve 2500 Manuale Utente

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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 Synchronization

SNTP provides two operating modes:

■

 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 

 expires 

three consecutive times without an update received from the first-detected server.

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

■

 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 

  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: 

 or 

 (the default).

2.

Enable the protocol. The choices are:

•

SNTP: 

or