Inalp Networks SmartWare Release 2.10, Software Configuration Manual

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186 SNTP Client Configuration
21 SNTP CLIENT CONFIGURATION
This chapter describes how to configure Simple Network Time Protocol (SNTP) client. For a
complete description of the SNTP related commands in this chapter, refer to Chapter 5, “System
Mode” chapter of the SmartWare
Command Reference Guide .
This chapter includes the following sections:
• Introduction
• SNTP Client Configuration Task List
•
Recommended Public SNTP Time Servers
21.1 Introduction
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 complex 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 misbehaving servers than an NTP client and should only be used in situations
where strong authentication is not required.
21.2 Software Configuration Guide Release 2.10 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 application.
• Selecting SNTP time servers
•
Defining SNTP client operating mode
•
Defining SNTP local UDP port
•
Enabling and disabling the SNTP client
• Defining the SNTP client anycast address
• Defining SNTP client constant offset to GMT
• Enabling and disabling local clock offset compensation
•
Enabling and disabling root delay Compensation
•
Defining SNTP client poll interval
•
Showing SNTP client related information
• Debugging SNTP client operation
21.3 Selecting SNTP Time Servers
Procedure
To select a primary and secondary SNTP time server
Mode
Configure
Software Configuration Guide Release 2.10, Revision 1.00