3Com 3C13636 Configuration Manual page 176

3Com Router 3000 Ethernet Family
Configuration Guide
Note:
This example assumes that:
MPLS VPN configuration is complete.
CE 1 and PE 1 can ping each other, so can PE 1 and PE 2, and PE 2 and CE 2.
1) Configure CE 1
# Set the local clock to function as the NTP master clock at stratum 1.
<CE1> system-view
[CE1] ntp-service refclcok-master 1
2) Configure CE 2
# Set CE 1 in VPN 1 as the NTP server for CE 2.
<CE2> system-view
[CE2] ntp-service unicast-server 133.1.1.1
# Display information about NTP sessions and status.
[CE2] display ntp-service status
Clock status: synchronized
Clock stratum: 2
Reference clock ID: 133.1.1.1
Nominal frequency: 63.9100 Hz
Actual frequency: 63.9100 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 47.00 ms
Root dispersion: 0.18 ms
Peer dispersion: 34.29 ms
Reference time: 02:36:23.119 UTC Jan 1 2001(BDFA6BA7.1E76C8B4)
[CE2] display ntp-service sessions
**************************************************************************
[12345]133.1.1.1
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
[CE2] display ntp-service trace
server 127.0.0.1,stratum 2, offset -0.013500, synch distance 0.03154
server 133.1.1.1,stratum 1, offset -0.506500, synch distance 0.03429
refid LOCL
You may find out that CE 2 has synchronized to CE 1 and is functioning at stratum 2.
source reference
LOCL
3Com Corporation
stra reach poll now offset delay disper
1 7 64
8-22
Chapter 8 NTP Configuration
15 0.0 47.0 7.8