3Com Switch 8800 Configuration Guide Chapter 49 NTP Configuration49-14Configure Ethernet Switch SW88001:Enter system view. system-viewEnter Vlan-interface2 view.[SW88001] interface vlan-interface 2[SW88001-Vlan-Interface2] ntp-service broadcast-clientThe above examples configured SW88004 and SW88001 to listen to the broadcastthrough Vlan-interface2, SW88003 to broadcast packets from Vlan-interface2. SinceSW88001 and SW88003 are not located on the same segment, they cannot receiveany broadcast packets from SW88003, while SW88004 is synchronized by SW88003after receiving its broadcast packet.After the synchronization, you can find the state of SW88004 as follows:[SW88004] display ntp-service statusclock status: synchronizedclock stratum: 3reference clock ID: LOCAL(0)nominal frequency: 100.0000 Hzactual frequency: 100.0000 Hzclock precision: 2^17clock offset: 0.0000 msroot delay: 0.00 msroot dispersion: 10.94 mspeer dispersion: 10.00 msreference time: 20:54:25.156 UTC Mar 7 2002(C0325201.2811A112)By this time, SW88004 has been synchronized by SW88003 and it is at stratum 3,higher than SW88003 by 1.Display the status of SW88004 sessions and you will see SW88004 has beenconnected to SW88003.[SW88002] display ntp-service sessionssource reference stra reach poll now offset delay disper[12345]127.127.1.0 LOCAL(0) 7 377 64 57 0.0 0.0 1.0[5]1.0.1.11 LOCAL(0) 3 0 64 - 0.0 0.0 0.0[5]128.108.22.44 0.0.0.0 16 0 64 - 0.0 0.0 0.0note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured49.4.4 Configure NTP Multicast ModeI. Network requirementsSW88003 sets the local clock as the master clock at stratum 2 and multicast packetsfrom Vlan-interface2. Set SW88004 and SW88001 to receive multicast messages from
