3Com 4200G 12-Port Configuration Manual page 497

Network diagram
Figure 1-7 Network diagram for NTP peer mode configuration
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Device B
Configuration procedure
1) Configure Device C.
# Set Device A as the NTP server.
<DeviceC> system-view
[DeviceC] ntp-service unicast-server 3.0.1.31
2) Configure Device B (after the Device C is synchronized to Device A).
# Enter system view.
<DeviceB> system-view
# Set Device C as the peer of Device B.
[DeviceB] ntp-service unicast-peer 3.0.1.33
Device C and Device B are symmetric peers after the above configuration. Device B works in symmetric
active mode, while Device C works in symmetric passive mode. Because the stratum level of the local
clock of Device B is 1, and that of Device C is 3, the clock of Device C is synchronized to that of Device
B.
View the status of Device C after the clock synchronization.
[DeviceC] display ntp-service status
Clock status: synchronized
Clock stratum: 2
Reference clock ID: 3.0.1.32
Nominal frequency: 60.0002 Hz
Actual frequency: 60.0002 Hz
Clock precision: 2^18
Clock offset: 0.66 ms
Root delay: 27.47 ms
Root dispersion: 208.39 ms
Peer dispersion: 9.63 ms
Reference time: 17:03:32.022 UTC Apr 2 2007 (BF422AE4.05AEA86C)
The output information indicates that the clock of Device C is synchronized to that of Device B and the
stratum level of its local clock is 2, one level lower than Device B.
Device A
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Device C
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