NTP Client

NTP Client

If a system is going to act as an NTP client, creating the configuration file is much simpler. Instead of copying the template /etc/inet/ntp.server file to /etc/inet/ntp.conf, the template /etc/inet/ntp.client file is copied to /etc/inet/ntp.conf. By default, this file contains a list that listens for multicast broadcasts on the local subnet:


NTP clients send and receive NTP message data in a specific format. The main fields transmitted include the following:

  • Leap Indicator Flag that indicates a leap year at the end of the day.

  • Version Number NTP v3.

  • Mode Determines whether the message is symmetric active, symmetric passive, client, server, broadcast, or an NTP control message.

  • Stratum Level of accuracy for the message, with 1 being a primary server and 2–255 indicating secondary servers of decreasing accuracy.

  • Poll Interval Maximum time separating messages.

  • Precision Local clock precision.

  • Root Delay Delay anticipated between the primary and other sources.

  • Root Dispersion Error estimate from the primary source.

  • Reference Clock Identifier Allows the primary source clock to be identified.

  • Reference Timestamp The last time the local clock was updated.

  • Originate Timestamp The time at which the message was transmitted from a client.

  • Receive Timestamp The time at which the message was received.

  • Transmit Timestamp The time at which the message was transmitted from a server.

  • Authenticator Specifies the authentication method used.

Part I: Solaris 9 Operating Environment, Exam I