H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 502)

54-17
Network diagram
Figure 54-8 Network diagram for NTP symmetric peers mode configuration
Configuration procedure
1) Configuration on AC A:
# Specify the local clock as the reference source, with the stratum level of 2.
<AC A> system-view
[AC A] ntp-service refclock-master 2
2) Configuration on AC B:
# Specify AC A as the NTP server of AC B.
<AC B> system-view
[AC B] ntp-service unicast-server 3.0.1.31
3) Configuration on AC C (after AC B is synchronized to AC A):
# Specify the local clock as the reference source, with the stratum level of 1.
<AC C> system-view
[AC C] ntp-service refclock-master 1
# Configure AC B as a symmetric peer after local synchronization.
[AC C] ntp-service unicast-peer 3.0.1.32
In the step above, AC B and AC C are configured as symmetric peers, with AC C in the
symmetric-active mode and AC B in the symmetric-passive mode. Because the stratum level of AC C is
1 while that of AC B is 3, AC B is synchronized to AC C.
# View the NTP status of AC B after clock synchronization.
[AC B] display ntp-service status
Clock status: synchronized
Clock stratum: 2
Reference clock ID: 3.0.1.33
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 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 Apr 20 2007 (C6D95647.153F7CED)
As shown above, AC B has been synchronized to AC C, and the clock stratum level of AC B is 2, while
that of AC C is 1.