H3C Technologies H3C S6300 Series Switches - Manual (Page 45)

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# Enable the NTP service.
system-view
[DeviceA] ntp-service enable
# Specify the local clock as the reference source, with the stratum level 3.
[DeviceA] ntp-service refclock-master 3
3. Configure Device B:
# Enable the NTP service.
[DeviceB] ntp-service enable
# Specify Device A as the NTP server of Device B.
[DeviceB] ntp-service unicast-server 3.0.1.31
4. Configure Device C:
# Enable the NTP service.
system-view
[DeviceC] ntp-service enable
# Specify the local clock as the reference source, with the stratum level 2.
[DeviceC] ntp-service refclock-master 2
# Configure Device B as a symmetric passive peer.
[DeviceC] ntp-service unicast-peer 3.0.1.32
5. Verify the configuration:
# After the configuration, Device B has two time servers Device A and Device C. Device C has a
lower stratum level than Device A, so Device B selects Device C as a reference clock to synchronize
to Device C. After synchronization, view the status of Device B. The output shows that Device B has
been synchronized to Device C.
[DeviceB] display ntp-service status
Clock status: synchronized
Clock stratum: 3
System peer: 3.0.1.33
Local mode: sym_passive
Reference clock ID: 3.0.1.33
Leap indicator: 00
Clock jitter: 0.000916 s
Stability: 0.000 pps
Clock precision: 2^-17
Root delay: 0.00609 ms
Root dispersion: 1.95859 ms
Reference time: 83aec681.deb6d3e5 Sun, Jan 4 1970 5:56:17.869
# Display IPv4 NTP association information for Device B.
[DeviceB] display ntp-service sessions
source reference stra reach poll now offset delay disper
********************************************************************************
[25]3.0.1.31 127.127.1.0 3 28 64 - 0.0000 0.0000 4000.0
[1234]3.0.1.33 127.127.1.0 2 62 64 34 0.4251 6.0882 1392.1
Notes: 1 source(master), 2 source(peer), 3 selected, 4 candidate, 5 configured.
Total sessions: 2
The output shows that an association has been set up between Device B and Device A, and Device
B and Device C