25-24z Switch C works in the broadcast server mode and sends out broadcast messages fromVLAN-interface 2.z Switch D works in the broadcast client mode and receives broadcast messages throughVLAN-interface 2.z NTP authentication is enabled on both Switch C and Switch D.Figure 25-12 Network diagram for configuration of NTP broadcast mode with authenticationConfiguration procedure1) Configuration on Switch C:# Configure NTP authentication. system-view[SwitchC] ntp-service authentication enable[SwitchC] ntp-service authentication-keyid 88 authentication-mode md5 123456[SwitchC] ntp-service reliable authentication-keyid 88# Specify Switch C as an NTP broadcast server, and specify an authentication key.[SwitchC] interface vlan-interface 2[SwitchC-Vlan-interface2] ntp-service broadcast-server authentication-keyid 882) Configuration on Switch D:# Configure NTP authentication. system-view[SwitchD] ntp-service authentication enable[SwitchD] ntp-service authentication-keyid 88 authentication-mode md5 123456[SwitchD] ntp-service reliable authentication-keyid 88# Configure Switch D to work in the NTP broadcast client mode.[SwitchD] interface vlan-interface 2[SwitchD-Vlan-interface2] ntp-service broadcast-clientNow, Switch D can receive broadcast messages through VLAN-interface 2, and Switch C can sendbroadcast messages through VLAN-interface 2. Upon receiving a broadcast message from Switch C,Switch D synchronizes its clock to that of Switch C.# View the NTP status of Switch D after clock synchronization.[SwitchD-Vlan-interface2] display ntp-service status
