H3C Technologies H3C SR8800 - Manual (Page 84)

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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
source reference stra reach poll now offset delay disper
**************************************************************************
[245] 3.0.1.31 127.127.1.0 2 15 64 24 10535.0 19.6 14.5
[1234] 3.0.1.33 LOCL 1 14 64 27 -77.0 16.0 14.8
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 2
Configuring NTP broadcast mode
Network requirements
As shown in Figure 27 , Router C functions as the NTP server for multiple routers on a network segment
and synchronizes the time among multiple routers. More specifically:
• 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 sends out broadcast messages from
GigabitEthernet 3/1/10.
• Router D and Router A work in the broadcast client mode and receive broadcast messages through
their respective GigabitEthernet 3/1/10.
Figure 27 Network diagram
Configuration procedure
1. Set the IP address for each interface as shown in Figure 27 . (Details not shown)
2. Configure Router C:
# Specify the local clock as the reference source, with the stratum level of 2.
<RouterC> system-view
[RouterC] ntp-service refclock-master 2
# Configure Router C to work in the broadcast server mode and send broadcast messages through
GigabitEthernet 3/1/10.
[RouterC] interface GigabitEthernet 3/1/10