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cluster time-service ntp server create

Add a NTP Server

Availability: This command is available to cluster administrators at the admin privilege level.


The cluster time-service ntp server create command associates the cluster with an external network time server for time correction and adjustment by using the Network Time Protocol (NTP).

The command resolves the time server host name to an IP address and performs several validation checks. If an error is detected during validation, it is reported.

The validation checks performed by this command include the following:


-server <text> - NTP Server Host Name, IPv4 or IPv6 Address

This specifies the host name or IP address of the external NTP server that is to be associated with the cluster for time correction and adjustment.

[-version {3|4|auto}] - NTP Version for Server (default: auto)

This optionally specifies the NTP protocol version that should be used for communicating with the external NTP server. If the external NTP server does not support the specified protocol version, time exchange cannot take place.

The supported values for this parameter include the following:

The default setting is auto.

[-is-preferred {true|false}] - Is Preferred NTP Server (default: false) (privilege: advanced)

This optionally specifies whether the external NTP server is the primary time source for correcting and adjusting the cluster time. The responses from this source will be used unless its time is outside the accepted selection range.

The default setting is false.

You use this parameter when a high quality radio (or GPS) based time server is being used with a set of non-radio based backup time servers.


The following example associates the cluster with an NTP server named
cluster1::> cluster time-service ntp server create -server

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