Enable NTP Globally

Enable NTP globally. Default values are in effect for most parameters. You can customize NTP by modifying parameters.

Procedure

Enter Global Configuration mode:

enable

configure terminal
Optional: Configure the NTP interval time (between successive NTP updates):

ntp interval <1–2185>

OR

ntp interval <4-17>
Enable NTP globally:

ntp
Confirm the global configuration:

show ntp

Example

Specify the time interval between NTP updates, and then enable NTP globally.

Switch:1>enable
Switch:1#configure terminal
Switch:1(config)#ntp interval 10
Switch:1(config)#ntp

Confirm the configuration:

Switch:1(config)#show ntp

=========================================================================================
                                   NTP Master
=========================================================================================
Version   Enabled    Stratum
-----------------------------------------------------------------------------------------
4         False      10

=========================================================================================
                                   NTP Client
=========================================================================================
Version  Enabled   Interval  Last Update Time                Synchronized To
-----------------------------------------------------------------------------------------
3        True      10        Thu Jul 18 08:32:59 2019 EDT    192.0.2.0 (Stratum:2)

Switch:1(config)#show ntp

==========================================================================================
                                      NTP
==========================================================================================
Version   Enabled        Interval    Last Update Time                   Synchronized To
------------------------------------------------------------------------------------------
3         True           10

Variable Definitions

The following table defines parameters for the ntp command.


Variable	Value
authentication-key <1–65534> WORD<0–20>	Creates an authentication key for MD5 or SHA1 authentication. To configure this option to the default value, use the default operator with the command. The default configuration is to delete the authentication key. NTP server MD5 or SHA1 authentication does not support passwords (keys) that start with a special character or contain a space between characters. `WORD<0–20>` specifies the secret key.
type `<md5 \| sha1>`	Specifies the type of authentication as MD5 or SHA1. The default is MD5 authentication.
interval`<1–2185>` OR `<4-17>` Note: Exception: interval range 1-2185 is supported on VSP 8600 Series only.	VSP 8600 Series: Specifies the time interval between successive NTP updates in minutes. The default for NTPv3 is 15 minutes. The default for NTPv4 is 6 minutes. VOSS switches: Specifies the time interval between successive NTP updates as a power of 2 in seconds. The default for NTPv4 is 2 to the power of 8 seconds. Note: Exception: NTPv3 is supported on VSP 8600 Series only. To restore the NTP interval to the default value, use the default ntp interval command.