1-20[DeviceA] interface Vlan-interface 2[DeviceA-Vlan-interface2] ntp-service multicast-clientAfter the above configurations, Device A and Device D respectively listen to multicast messagesthrough their own Vlan-interface2, and Device C advertises multicast messages throughVlan-interface2. Because Device A and Device C do not share the same network segment, Device Acannot receive multicast messages from Device C, while Device D is synchronized to Device C afterreceiving multicast messages from Device C.View the NTP status of Device D after the clock synchronization.[DeviceD] display ntp-service statusClock status: synchronizedClock stratum: 3Reference clock ID: 3.0.1.31Nominal frequency: 100.0000 HzActual frequency: 100.0000 HzClock precision: 2^18Clock offset: 198.7425 msRoot delay: 27.47 msRoot dispersion: 208.39 msPeer dispersion: 9.63 msReference time: 17:03:32.022 UTC Apr 2 2007 (BF422AE4.05AEA86C)The output information indicates that Device D is synchronized to Device C, with a clock stratum level of3, one stratum level lower than that Device C.# View the information about the NTP sessions of Device D (You can see that a connection isestablished between Device D and Device C).[DeviceD] display ntp-service sessionssource 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 9.7note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured Totalassociations : 1Configuring NTP Server/Client Mode with AuthenticationNetwork requirementsz The local clock of Device A is set as the NTP master clock, with a clock stratum level of 2.z Device B is an S3100 Ethernet switch and uses Device A as the NTP server. Device B is set towork in client mode, while Device A works in server mode automatically.z The NTP authentication function is enabled on Device A and Device B.Network diagramFigure 1-10 Network diagram for NTP server/client mode with authentication configuration
