H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 469)

46-18
After the above configurations, Device A and Device D will listen to broadcast messages through their
own Vlan-interface2, and Device C will send broadcast messages through Vlan-interface2. Because
Device A and Device C do not share the same network segment, Device A cannot receive broadcast
messages from Device C, while Device D is synchronized to Device C after receiving broadcast
messages from Device C.
View the NTP status of Device D after the clock synchronization.
[DeviceD] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 3.0.1.31
Nominal frequency: 60.0002 Hz
Actual frequency: 60.0002 Hz
Clock precision: 2^18
Clock offset: 198.7425 ms
Root delay: 27.47 ms
Root dispersion: 208.39 ms
Peer dispersion: 9.63 ms
Reference time: 17:03:32.022 UTC Thu Sep 7 2006 (BF422AE4.05AEA86C)
The output information indicates that Device D is synchronized to Device C, with the clock stratum level
of 3, one level lower than that of Device C.
# View the information about the NTP sessions of Device D and you can see that a connection is
established between Device D and Device C.
[DeviceD] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[1234]3.0.1.31 127.127.1.0 2 1 64 377 26.1 199.53 9.7
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured Total
associations : 1
Configuring NTP Multicast Mode
Network requirements
z
As shown in Figure 46-9 , the local clock of Device C is set as the NTP master clock, with a clock
stratum level of 2. Configure Device C to work in the NTP multicast server mode and advertise
multicast NTP messages through Vlan-interface2.
z
Device A and Device D are two WX3000 series devices. Configure Device A and Device D to work
in the NTP multicast client mode and listen to multicast messages through their own
Vlan-interface2.