Operation Manual – NTPH3C S3100 Series Ethernet Switches Chapter 1 NTP Configuration1-23II. Network diagramVlan-int21.0.1.31/24Vlan-int23.0.1.31/24Vlan-int23.0.1.32/24Device A Device BDevice CDevice DFigure 1-9 Network diagram for NTP multicast mode configurationIII. Configuration procedure1) Configure Device C.# Enter system view. system-view# Set Device C as a multicast server to send multicast messages throughVlan-interface2.[DeviceC] interface Vlan-interface 2[DeviceC-Vlan-interface2] ntp-service multicast-server2) Configure Device A (perform the same configuration on Device D).# Enter system view. system-view# Set Device A as a multicast client to listen to multicast messages throughVlan-interface2.[DeviceA] interface Vlan-interface 2[DeviceA-Vlan-interface2] ntp-service multicast-clientAfter the above configurations, Device A and Device D respectively listen to multicastmessages through their own Vlan-interface2, and Device C advertises multicastmessages through Vlan-interface2. Because Device A and Device C do not share thesame network segment, Device A cannot receive multicast messages from Device C,while Device D is synchronized to Device C after receiving multicast messages fromDevice C.View the NTP status of Device D after the clock synchronization.[DeviceD] display ntp-service status
