H3C Technologies H3C MSR 5600 - Manual (Page 101)

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# Router A and Router B get synchronized upon receiving a broadcast message from Router C.
Display the NTP status of Router A after clock synchronization.
[RouterA-Ethernet1/1] display ntp-service status
Clock status: synchronized
Clock stratum: 3
System peer: 3.0.1.31
Local mode: bclient
Reference clock ID: 3.0.1.31
Leap indicator: 00
Clock jitter: 0.044281 s
Stability: 0.000 pps
Clock precision: 2^-10
Root delay: 0.00229 ms
Root dispersion: 4.12572 ms
Reference time: d0d289fe.ec43c720 Sat, Jan 8 2011 7:00:14.922
The output shows that Router A has been synchronized to Router C, the clock stratum level of Router
A is 3, and the clock stratum level of Router C is 2.
# Display IPv4 NTP association information for Router A.
[RouterA-Ethernet1/1] display ntp-service sessions
source reference stra reach poll now offset delay disper
********************************************************************************
[1245]3.0.1.31 127.127.1.0 2 1 64 519 -0.0 0.0022 4.1257
Notes: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured.
Total sessions : 1
The output shows that an association has been set up between Router A and Router C
NTP multicast mode configuration example
Network requirements
As shown in Figure 34 , Router C functions as the NTP server for multiple devices on different network
segments and synchronizes the time among multiple devices.
• Router C's local clock is to be used as a reference source, with the stratum level 2.
• Router C operates in multicast server mode and sends out multicast messages from Ethernet 1/1.
• Router D and Router A operate in multicast client mode and receive multicast messages through
their respective Ethernet 1/1.