Alcatel Carrier Internetworking Solutions Switch/Router 用户手册

Page 12-13

For the switch to synchronize its time, you must specify a server, or servers, from which the 
switch receives time information. This is done with the 

 command.

To add a synchronization server to a switch, use the command that follows:

where 

 is the either the domain name or IP address of the server. The optional 

configuration items are described below:

. An unsigned 32-bit integer key identifier for encryption authentication. The 

default is no key 

ID

.

 The version of 

NTP

 being used. The options are versions 1, 2, or 3. If no 

number is entered, it is assumed that version 3 is being used.

. The minimum poll interval for time checks to this server. The number entered is 

seconds raised to the power of 2.

. An identifier that marks this peer as a preferred source of time information. In a 

situation where multiple peers could provide time information to this client, the preferred 
peer is the one that is used.

For example, to add a peer with an address of 1.1.1.1, a key identifier of 5, using version 3 of 

NTP

, with a poll time of 16, and marked as a preferred server, you would enter the following:

When you have finished press 

. A brief message appears confirming the addition of a 

new server.

The 

NTP

 server can be configured to operate in broadcast mode, where the server sends peri-

odic broadcast messages to a client population by using the broadcast or multicast address 
specified. To configure the server to use a broadcast or multicast address, enter the 

 

command as shown:

where 

 is the either the domain name or the broadcast or multicast address.

♦ Important Note ♦

A multicast address of 224.0.1.1 has been assigned to 

NTP

. Presently, this is the only address that should be 

used for multicast messages.

The optional configuration items are described below:

. An unsigned 32-bit integer key identifier for encryption authentication. The 

default is no key 

ID

.

 The version of 

NTP

 being used. The options are versions 1, 2, or 3. If no 

number is entered, it is assumed that version 3 is being used.

. The minimum poll interval for time checks to this server. The number entered is 

in seconds raised to the power of 2.