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DES-7200 Configuration Guide Chapter 3 NTP
Configuration
3) The hardware clock of Switch B shall be synchronized as well.
3.4.1.3 Configuration Tips
NTP server
Generally, the local system will directly or indirectly synchronize with the
external clock sources. However, the local system may not be able to
synchronize with the external clock sources due to the failure of network
connections. In such a case, you can execute "ntp master" command to
configure the local clock as NPT master clock to synchronize time to other
devices.
NTP client
Configure the NTP server
By configuring NTP hardware clock update, NTP client can use the clock value
synchronized from external clock sources to update its hardware clock, so that
the hardware clock can also maintain precise.
3.4.1.4 Configuration Steps
Configuration of NTP server
! Configure NTP master clock. Configure local clock as the trusted reference
clock source, with clock stratum being 12;
SwitchA(config)#ntp master 12
Configuration of NTP client
! Configure Switch A as the NTP server
SwitchB(config)#ntp server 1.1.1.1
! Configure NTP hardware clock update
SwitchB(config)# ntp update-calendar
3.4.1.5 Verify Configurations
Check the time before configuring NTP synchronization
! Check the time of reference clock source
SwitchA#show clock
17:12:48 UTC Tue, Sep 8, 2009
! Check the time of client before synchronization
SwitchB#show clock
12:01:10 UTC Sat, Jan 1, 2000
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