3Com 8800 Configuration Manual page 733

3Com Switch 8800 Configuration Guide
II. Network diagram
See Figure 7-2.
III. Configuration procedure
Configure Ethernet Switch SW88003:
Enter system view.
<SW88003> system-view
Set the local clock as the NTP master clock at stratum 2.
[SW88003] ntp-service refclock-master 2
Configure Ethernet Switch SW88004:
Enter system view.
<SW88004> system-view
Set SW88001 as the NTP server at stratum 3 after synchronization.
[SW88004] ntp-service unicast-server 3.0.1.31
Configure Ethernet Switch SW88005: (SW88004 has been synchronized by SW88003)
Enter system view.
<SW88005> system-view
Set the local clock as the NTP master clock at stratum 1.
[SW88005] ntp-service refclock-master 1
After performing local synchronization, set SW88004 as a peer.
[SW88005] ntp-service unicast-peer 3.0.1.32
The above examples configure SW88004 and SW88005 as peers and configure
SW88005 as in active peer mode and SW88004 in passive peer mode. Since
SW88005 is at stratum 1 and SW88004 is at stratum 3, synchronize SW88004 by
SW88005.
After synchronization, SW88004 status is shown as follows:
[SW88004] display ntp-service status
Clock status: synchronized
Clock stratum: 2
Reference clock ID: 3.0.1.31
Nominal frequency: 60.0002 Hz
Actual frequency: 60.0002 Hz
Clock precision: 2^17
Clock offset: -9.8258 ms
Root delay: 27.10 ms
Root dispersion: 49.29 ms
Peer dispersion: 10.94 ms
49-12
Chapter 49 NTP Configuration