28
[DeviceA] ntp-service enable
# Specify the local clock as the reference source, with the stratum level 2.
[DeviceA] ntp-service refclock-master 2
3. Configure Device B:
# Enable the NTP service.
<DeviceB> system-view
[DeviceB] ntp-service enable
# Specify Device A as the IPv6 NTP server of Device B so that Device B is synchronized to
Device A.
[DeviceB] ntp-service ipv6 unicast-server 3000::34
4. Verify the configuration:
# Verify that Device B has synchronized to Device A, and the clock stratum level is 3 on Device
B and 2 on Device A.
[DeviceB] display ntp-service status
Clock status: synchronized
Clock stratum: 3
System peer: 3000::34
Local mode: client
Reference clock ID: 163.29.247.19
Leap indicator: 00
Clock jitter: 0.000977 s
Stability: 0.000 pps
Clock precision: 2^-10
Root delay: 0.02649 ms
Root dispersion: 12.24641 ms
Reference time: d0c60419.9952fb3e Wed, Dec 29 2010 19:01:45.598
# Verify that an IPv6 NTP association has been established between Device B and Device A.
[DeviceB] display ntp-service ipv6 sessions
Notes: 1 source(master), 2 source(peer), 3 selected, 4 candidate, 5 configured.
Source: [12345]3000::34
Reference: 127.127.1.0 Clock stratum: 2
Reachabilities: 15 Poll interval: 64
Last receive time: 19 Offset: 0.0
Roundtrip delay: 0.0 Dispersion: 0.0
Total sessions: 1
NTP symmetric active/passive mode configuration example
Network requirements
As shown in Figure 10:
• Configure the local clock of Device A as a reference source, with the stratum level 2.
• Configure Device A to operate in symmetric-active mode and specify Device B as the passive
peer of Device A.
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