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DES-7200 Configuration Guide Chapter 3 NTP
Configuration
Note
The starum indicates the level of current clock, reference
indicates the address of the server used for synchronization, freq
indicates the clock frequency of current system, precision
indicates the precision of current system clock, reference time
indicates the UTC time of reference clock on the synchronization
server, clock offset indicates the offset of current clock, root delay
indicates the delay of current clock, root dispersion indicates the
precision of top server, peer dispersion indicates the precision of
synchronization server.
To configure the NTP master, run the following commands in the global
configuration mode:
Command Function
ntp master
Set the local time as the NTP master and
specify the corresponding starum. The
time starum ranges from 1-15, 8 by
default.
no ntp master
Cancel the NTP master settings.
The following example shows how to set the reliable reference source of the
local time and set the time starum as 12:
DES-7200(config)# ntp master 12
Caution
Using this command to set the local time as the master (in
particular, specify a lower starum value), is likely to be covered by
the effective clock source. If multiple devices in the same network
use this command, the time synchronization instability may occur
due to the time difference between the devices.
In addition, before using this command, if the system has never
been synchronized with an external clock source, it is necessary to
manually calibrate the system clock to prevent too much bias. (For
how to how to manually calibrate the system clock, please refer to
the section of system time configuration of "Basic switch
management Configuration Guide")
This command is not restricted by ntp access control (even if the
NTP access control function has corresponding matching limit, this
command is still in force).
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