CLI Reference Guide    NTP Configuration Commands 
 
Global configuration mode. 
8 consecutive packets are synchronized for the first synchronization of 
NTP  and  each  server.  Then  the  synchronization  occurs  every  one 
minute. This command is used to complete the instant synchronization 
during the interval of auto-sync.   
The following example synchronizes the NTP realtime. 
Ruijie(config)#ntp synchronize 
 
ntp trusted-key 
Use this command to set a key at the global trusted key. 
ntp trusted-key key-id 
no ntp trusted-key key-id 
Global  trusted  key  ID,  in  the  range  of  1  to 
4294967295. 
Global configuration mode. 
The NTP communication parties must use the same trusted key. The 
key is identified by ID and is not transmitted to improve security.