User's Manual

Table Of Contents
559
Users Manual of CS-6306R
Chapter 56. SNTP Configuration
Overview 56.1
56.1.1 Stipulations
56.1.1.1 Format Stipulation in the Command Line
Syntax Definition
Bold
Stands for the keyword in the command line, which stays unchanged and must be entered without any
modification. It is presented as a bold in the command line.
{italic}
Stands for the parameter in the command line, which must be replaced by the actual value. It must be
presented by the italic in the brace.
<italic>
Stands for the parameter in the command line, which must be replaced by the actual value. It must be
presented by the italic in the point bracket.
[ ] Stands for the optional parameter, which is in the square bracket.
{ x | y | ... } Means that you can choose one option from two or more options.
[ x | y | ... ] Means that you can choose one option or none from two or more options.
{ x | y | ... } *
Means that you has to choose at least one option from two or more options, or even choose all options.
[ x | y | ... ] * Means that you can choose multiple options or none from two or more options.
&<1-n>
Means that the parameter before the “&” symbol can be entered n times.
# Means that the line starting with the “#” symbol is an explanation line.
SNTP Configuration 56.2
56.2.1 Overview
Simple Network Time Protocol (SNTP) is currently an important method to realize time synchronization on the
Internet.
SNTP adopts the client-server mode. The server obtains its own time by receiving the GPS signals or takes its
own atomic clock as its time standard, while the client, by regularly accessing the time service provided by the
server, gets the correct time information and regulates its own clock to synchronize with the time on the
Internet. The UDP protocol and port 123 are used for the communication between the client and the server.
56.2.2 SNTP Configuration Task List
SNTP settings can be divided into two parts: one part is for the local switch to take as the SNTP server, and
the other is for the local switch to take as the SNTP client.
The local switch takes as the SNTP server:
Setting the Grade of the SNTP Server
Enabling the SNTP Server