Operation Manual – NTPH3C S3610&S5510 Series Ethernet Switches Chapter 1 NTP Configuration1-29II. Network diagramVlan-int31.0.1.11/24Vlan-int31.0.1.10/24Vlan-int23.0.1.31/24Vlan-int23.0.1.32/24Vlan-int23.0.1.30/24Switch A Switch BSwitch CSwitch DFigure 1-12 Network diagram for configuration of NTP broadcast mode withauthenticationIII. Configuration procedure1) Configuration on Switch C:# Specify the local clock as the reference source, with the stratum level of 3. system-view[SwitchC] ntp-service refclock-master 3# Configure NTP authentication[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-keyid882) 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-client
