Motorola WS5100 用户手册

5-22   WS5100 Series Switch System Reference Guide

 

9. Use the 

drop-down menu to select the version of SNTP to use with this configuration 

Currently version three and version four implementations of NTP are available. The latest version is 
NTPv4, but the official Internet standard is NTPv3.

10.If necessary, select the 

checkbox to allow communications with the NTP resource 

without any form of security. This option should only be used with known NTP resources.

11.Select the 

checkbox to use an Auto key protocol based on the public key 

infrastructure (PKI) algorithm. The SNTP server uses a fast algorithm and a private value to regenerate 
key information on the arrival of a message. The switch sends its designated public key to the server for 
credential verification and the two exchange messages. This option is disabled when the Broadcast 
Server checkbox is selected.

12.Select the 

 checkbox to use a single (symmetric) key for encryption and 

decryption. Since both the sender and the receiver must know the same key, it is also referred to as 
shared key cryptography. The key can only be known by the sender and receiver to maintain secure 
transmissions.

13.Enter an 

 between 1-65534. The Key ID is a Key abbreviation allowing the switch to reference 

multiple passwords. 

14.Select the 

 checkbox if this NTP resource is a preferred NTP resource. Preferred 

sources are contacted before non-preferred resources. There can be more than one preferred source. 

15.Refer to the 

field. The Status is the current state of the requests made from the applet. Requests 

are any “SET/GET” operation from the applet. The Status field displays error messages if something goes 
wrong in the transaction between the applet and the switch.

16.Click 

 to save and add the changes to the running configuration and close the dialog.

17.Click 

 to close the dialog without committing updates to the running configuration.

The interaction between the switch and a SNTP server constitutes an association. SNTP associations can be 
either a peer association (the switch synchronizes to the another system or allows another system to 
synchronize to it), or a server association (only the switch synchronizes to the SNTP resource, not the other 
way around). 

To review the switch’s current SNTP associations:

1. Select

> 

from the main menu tree.