Introduction; Sntp Client Configuration Task List - Patton electronics SmartNode Series Software Configuration Manual

SmartWare Software Configuration Guide

Introduction

This chapter describes how to configure Simple Network Time Protocol (SNTP) client, it includes the follow-
ing sections:
• SNTP client configuration task list
• Recommended Public SNTP Time Servers (see
The Simple Network Time Protocol (SNTP) is an adaptation of the Network Time Protocol (NTP) that is
used to synchronize computer clocks in the Internet. SNTP can be used when the ultimate performance of the
full NTP implementation is not needed. SNTP is described in RFC-2030, "Simple Network Time Protocol
(SNTP) Version 4 for IPv4, IPv6 and OSI".
SNTP typically provides time within 100 milliseconds of the accurate time, but it does not provide the com-
plex filtering and statistical mechanisms of NTP. In addition, SNTP does not authenticate traffic, although you
can configure extended access lists to provide some protection. An SNTP client is more vulnerable to misbe-
having servers than an NTP client and should only be used in situations where strong authentication is not
required.
SNTP client configuration task list
To configure an SNTP client, perform the tasks described in the following sections. The tasks in the first four
sections are required; the tasks in the remaining sections are optional, but might be required for your applica-
tion.
• Selecting SNTP time servers (see
• Defining SNTP client operating mode (see
• Defining SNTP local UDP port (see
• Enabling and disabling the SNTP client (see
• Defining the SNTP client anycast address (see
• Defining SNTP client constant offset to GMT (see
• Enabling and disabling local clock offset compensation (see
• Defining SNTP client poll interval (see
• Showing SNTP client related information (see
• Debugging SNTP client operation (see

Introduction

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26 • SNTP client configuration
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