H3C Technologies H3C MSR 50 - Manual (Page 57)

<DeviceA> system-view
[DeviceA] ntp-service refclock-master 2
3. Configure Device B:
# Specify Device A as the NTP server of Device B.
<DeviceB> system-view
[DeviceB] ntp-service unicast-server 3.0.1.31
4. Configure Device C (after Device B is synchronized to Device A):
# Specify the local clock as the reference source, with the stratum level 1.
<DeviceC> system-view
[DeviceC] ntp-service refclock-master 1
# Configure Device B as a symmetric peer after local synchronization.
[DeviceC] ntp-service unicast-peer 3.0.1.32
In the step above, Device B and Device C are configured as symmetric peers, with Device C in the
symmetric-active mode and Device B in the symmetric-passive mode. Because the stratus level of
Device C is 1 while that of Device B is 3, Device B synchronizes to Device C.
# Display the NTP status of Device B after clock synchronization.
[DeviceB] display ntp-service status
Clock status: synchronized
Clock stratum: 2
Reference clock ID: 3.0.1.33
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: -21.1982 ms
Root delay: 15.00 ms
Root dispersion: 775.15 ms
Peer dispersion: 34.29 ms
Reference time: 15:22:47.083 UTC Sep 19 2005 (C6D95647.153F7CED)
The output shows that Device B has synchronized to Device C. The stratum level of Device B is 2,
and that of Device C is 1.
# Display NTP session information for Device B, which shows that an association has been set up
between Device B and Device C.
[DeviceB] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[245] 3.0.1.31 127.127.1.0 2 15 64 24 10535.0 19.6 14.5
[1234] 3.0.1.33 LOCL 1 14 64 27 -77.0 16.0 14.8
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 2
NTP broadcast mode configuration example
Network requirements
As shown in Figure 19 , Router C functions as the NTP server for multiple devices on a network segment
and synchronizes the time among multiple devices.
• Router C’s local clock is to be used as a reference source, with the stratum level 2.
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