3Com MSR 50 Series Configuration Manual page 2065

# Specify the local clock as the reference source, with the stratum level of 1.
<DeviceC> system-view
[DeviceC] ntp-service refclock-master 1
# Configure Device B as a symmetric peer after local synchronization.
[DeviceC] ntp-service unicast-peer 3.0.1.32
In the step above, Device B and Device C are configured as symmetric peers, with
Device C in the symmetric-active mode and Device B in the symmetric-passive
mode. Because the stratus level of Device C is 1 while that of Device B is 3, Device
B is synchronized to Device C.
# View the NTP status of Device B after clock synchronization.
[DeviceB] display ntp-service status
Clock status: synchronized
Clock stratum: 2
Reference clock ID: 3.0.1.33
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 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 Sep 19 2005 (C6D95647.153F7CED)
As shown above, Device B has been synchronized to Device C, and the clock
stratum level of Device B is 2, while that of Device C is 1.
# View the NTP session information of Device B, which shows that an association
has been set up between Device B and Device C.
[DeviceB] display ntp-service sessions
**************************************************************************
[245] 3.0.1.31
[1234] 3.0.1.33
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations :
Configuring NTP Network requirements
Broadcast Mode
■
■
■
source reference
127.127.1.0
LOCL
2
Router C's local clock is to be used as a reference source, with the stratum level
of 2.
Router C works in the broadcast server mode and, and Router C sends out
broadcast messages from Ethernet 1/0.
Router D and Router A work in the broadcast client mode and receive
broadcast messages through their respective Ethernet 1/0.
NTP Configuration Examples
stra reach poll now
2 15 64 24
1 14 64 27
2065
offset delay disper
10535.0 19.6 14.5
-77.0 16.0 14.8