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DES-7200 Configuration Guide Chapter 3 NTP
Configuration
3 NTP Configuration
3.1 Understanding NTP
Network Time Protocol (NTP) is designed for time synchronization on network
devices. A device ca
n synchronize its clock source and the server. Moreover,
DES-7200 switches support the NTP client and server. That is, the switch can
ize the time of server, but also be the time server to
synchronize the time of other switches. But when the switch works as the time
3.2 Conf
the NTP protocol can provide precise time correction (less than one millisecond
on the LAN and dozens of milliseconds on the WAN, compared with the
standard time) and prevent from attacks by means of encryption and
confirmation.
To provide precise time, NTP needs precise time source, the Coordinated
Universal Time (UTC). The NTP may obtain UTC from the atom clock,
observatory, satellite or Internet. Thus, accurate and reliable time source is
available.
To prevent the time server from malicious destroying, an authentication
mechanism is used by the NTP to check whether the request of time correction
really comes from the declared server, and check the path of returning data.
This mechanism provides protection of anti-interference.
not only synchron
server, it only support the unicast server mode.
iguring NTP
This chapter describes how to configure the NTP client and server.
on key.
z
z P message.
z Configuring the NTP real-time synchronization
z Configuring the NTP update-calendar
z Configuring the NTP master
z Configuring the global NTP authentication mechanism.
z Configuring the global NTP authenticati
Configuring the global NTP trusted key ID.
z Configuring the NTP server.
Disabling the interface to receive the NT
z Enabling or disabling NTP.
3-1