3com 3031 Instruccion De Instalación

C

HAPTER

 9: NTP C

ONFIGURATION

The range of the NTP version 

number

 is 1 to 3. It is 3 by default. The range of the 

authentication key ID number is 1 to 4294967295. The 

 or the 

 specifies that the source IP address in the 

packets is obtained from the interface when the local router transmits NTP packets 
to the time server. The parameter 

priority

 specifies that the time server is the 

preferred one.  

The following configuration can be used to specify an interface on the local router 
to transmit NTP broadcast packets. The local router is run in broadcast mode, 
which acts as the broadcast server to advertise broadcast messages periodically to 
the broadcast clients. 

Perform the following in the Interface View.

The range of the NTP version 

number

 is 1 to 3. It is 3 by default. The range of the 

authentication 

keyid

 is 1 to 4294967295. This command must be configured on 

the interface that is to transmit NTP broadcast packets. 

The following configuration is used to specify the local interface on the local 
router to receive the NTP broadcast packets. The local router is run in broadcast 
client mode. It first listens discreetly to the broadcast packets from the server. 
When the first broadcast packet is received, the local router starts a short 
client/server process to exchange messages with the remote server in order to 
estimate network delay. Then it enters the broadcast client mode to listen 
discreetly to the broadcast packets and synchronize the local clock according to 
the coming broadcast packets. 

Perform the following in the Interface View. 

Table 80   Configuring NTP peer mode

Configure NTP peer mode

ntp-service unicast-peer X.X.X.X [ version 
number | authentication-key keyid | 
source-interface { { interface-name | 
interface-type } interface-number } | priority 
] *

Remove NTP peer mode

Table 81   Configuring NTP broadcast server mode

Configure NTP broadcast server

ntp-service broadcast-server [ 
authentication-keyid keyid | version 
number ] *

Remove NTP broadcast server mode

Table 82   Configuring NTP broadcast client mode

Configure NTP broadcast client (interface 
view)