Introduction To Ntp - H3C S9500 Series Operation Manual

Operation Manual – NTP
H3C S9500 Series Routing Switches
Chapter 1 NTP Configuration
When configuring NTP, go to these sections for information you are interested in:

Introduction to NTP

NTP Configuration
Displaying and Debugging NTP
NTP Configuration Examples
1.1 Introduction to NTP
1.1.1 NTP Functions
As the network topology gets more and more complex, it becomes important to
synchronize the clocks of the equipment on the whole network. Network Time Protocol
(NTP) is the TCP/IP that advertises the accurate time throughout the network.
NTP ensures the consistency of the following applications:
For the increment backup between the server and the client, NTP ensures the
clock synchronization between the two systems.
For multiple systems that coordinate to process a complex event, NTP ensures
them to reference the same clock and guarantee the right order of the event.
Guarantee the normal operation of the inter-system Remote Procedure Call
(RPC).
Record for an application when a user logs in to a system, a file is modified, or
some other operation is performed.
1.1.2 Basic Operating Principle of NTP
The following figure illustrates the basic operating principle of NTP:
1-1
Chapter 1 NTP Configuration