25
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^18
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)
The output shows that Device C has been synchronized to Device B and the clock stratum level of Device
C is 4.
# View the NTP session information of Device C, which shows that an association has been set up
between Device B and Device C.
[DeviceC] display ntp-service sessions
source reference stra reach poll now offset delay disper
********************************************************************************
[12345] 3.0.1.32 3.0.1.31 3 3 64 16 -6.4 4.8 1.0
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
Configuring NTP broadcast mode
Network requirements
As shown in Figure 13, Device C functions as the NTP server for multiple devices on a network segment
and synchronizes the time among multiple devices as follows:
• Device C’s local clock is to be used as a reference source, with the stratum level of 2.
• Device C works in broadcast server mode and sends out broadcast messages from VLAN-interface
2.
• Device A and Device B work in broadcast client mode, and each listen to broadcast messages
through their VLAN-interface 2.
Figure 13 Network diagram
Vlan-int2
3.0.1.31/24
Vlan-int2
3.0.1.32/24
Vlan-int2
3.0.1.30/24
Device A
Device C
Device B
Configuration procedure
1. Set the IP address for each interface as shown in Figure 13. (Details not shown)
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