H3C Technologies H3C MSR 50 - Manual (Page 68)

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as a reference source, with the stratum level 1, configure CE 1 to operate in symmetric peers mode, and
specify VPN 1 as the target VPN.
Configuration procedure
1. Set the IP address for each interface as shown in Figure 23 . (Details not shown.)
2. Configure CE 1:
# Specify the local clock as the reference source, with the stratum level 1.
system-view
[CE1] ntp-service refclock-master 1
3. Configure PE 1:
# Specify CE 1 as the symmetric-passive peer for VPN 1.
system-view
[PE1] ntp-service unicast-peer vpn-instance vpn1 10.1.1.1
# Display the NTP session information and status information on PE 1 a certain period of time later.
The information should show that PE 1 has been synchronized to CE 1, with the stratum level 2.
[PE1] display ntp-service status
Clock status: synchronized
Clock stratum: 2
Reference clock ID: 10.1.1.1
Nominal frequency: 63.9100 Hz
Actual frequency: 63.9100 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 32.00 ms
Root dispersion: 0.60 ms
Peer dispersion: 7.81 ms
Reference time: 02:44:01.200 UTC Jan 1 2001(BDFA6D71.33333333)
[PE1] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[12345]10.1.1.1 LOCL 1 1 64 29 -12.0 32.0 15.6
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
[PE1] display ntp-service trace
server 127.0.0.1,stratum 2, offset -0.012000, synch distance 0.02448
server 10.1.1.1,stratum 1, offset 0.003500, synch distance 0.00781
refid 127.127.1.0