NTP Configuration Mode Commands

NTP Configuration Mode Commands
 
The NTP Configuration Mode is used to manage the Network Timing Protocol (NTP) options for the entire system.
enable
Enables the use of the network timing protocol for updating the system clock.
Product
All
Privilege
Security Administrator, Administrator
Syntax
enable [ context ]
context
Default: local
Specifies the context for which NTP is to be enabled. name must refer to a previously configured context expressed as an alphanumeric string of 1 through 79 characters.
Usage
Sets the NTP server to be used for the system. Only one NTP server may be active at any given time. If this command were issued in a different context followed by the current context, the prior context’s NTP server would be disabled and the current context’s NTP server would be used.
If any NTP server is enabled, the chassis system clock will be synchronized to the active NTP server which covers all contexts for timing synchronization.
The use of a given context for NTP server assignment allows the server to inherit the domain and IP routing options of that context.
Example
enable NTPcontext
end
Exits the current configuration mode and returns to the Exec mode.
Product
All
Privilege
Security Administrator, Administrator
Syntax
end
Usage
Use this command to return to the Exec mode.
exit
Exits the current mode and returns to the parent configuration mode.
Product
All
Privilege
Security Administrator, Administrator
Syntax
exit
Usage
Use this command to return to the parent configuration mode.
server
Configures an NTP server for use by the local NTP client in synchronizing the system clock.
Product
All
Privilege
Security Administrator, Administrator
Syntax
server ip_address [ prefer ] [ version number ] [ minpoll poll_period ] [ maxpoll poll_period ]
no server ip_address
no
Indicates the server specified is to be removed from the list of NTP servers for clock synchronization.
ip_address
Specifies the IP address of the NTP server to allow for clock synchronization. ip_address must be specified using the IPv4 dotted-decimal notation.
prefer
Indicates the NTP server specified to be the preferred server. Only one server can be set to preferred. The preferred server is the first one contacted for clock synchronization.
note_smallImportant: Use of the prefer keyword is not recommended.
version number
Default: 4
Specifies the network timing protocol version to use for server communications. number must be an integer from 1 to 4.
minpoll poll_period
Default:6
Specifies the minimum polling interval (in seconds) for NTP messages as a power of 2. poll_period is the power or exponent. For example, if you specify the number 10, the value is 2^10 and the resultant poll period is 1024 seconds. poll_period must be an integer from 6 through 17.
maxpoll poll_period
Default: 10
Specifies the maximum polling interval (in seconds) for NTP messages as a power of 2. poll_period is the power or exponent. For example, if you specify the number 10, the value is 2^10 and the resultant poll period is 1024 seconds. poll_period must be an integer from 6 through 17.
Usage
Configure the network timing protocol servers in the network as changes occur.
note_smallImportant: Adding, removing, or modifying an NTP server configuration entry causes the NTP client to restart and restart the synchronization process with all configured NTP servers.
Example
The following command adds the NTP server with address 10.2.3.4 to the list of NTP servers.
server 10.2.3.4
 
 
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