To do… Use the command… RemarksEnter VLAN interface view interface Vlan-interfacevlan-id —Configure the switch to work inthe NTP broadcast servermodentp-service broadcast-server[ authentication-keyid key-id |version number ]*RequiredNot configured by default.Configuring a switch to work in the NTP broadcast client modeFollow these steps to configure a switch to work in the NTP broadcast client mode:To do… Use the command… RemarksEnter system view system-view —Enter VLAN interface view interface Vlan-interfacevlan-id —Configure the switch to work inthe NTP broadcast client mode ntp-service broadcast-client RequiredNot configured by default.Configuring NTP Multicast ModeFor switches working in the multicast mode, you need to configure both the server and clients. Themulticast server periodically sends NTP multicast messages to multicast clients. The switches workingin the NTP multicast client mode will respond to the NTP messages, so as to start the clocksynchronization.z A multicast server can synchronize multicast clients only after its clock has been synchronized.z An S4500 series switch working in the multicast server mode supports up to 1,024 multicast clients.Configuring a switch to work in the multicast server modeFollow these steps to configure a switch to work in the NTP multicast server mode:To do… Use the command… RemarksEnter system view system-view —Enter VLAN interface view interface Vlan-interface vlan-id —Configure the switch to work inthe NTP multicast server modentp-service multicast-server[ ip-address ] [ authentication-keyidkeyid | ttl ttl-number | version number ]*RequiredNot configured bydefault.Configuring a switch to work in the multicast client modeFollow these steps to configure a switch to work in the NTP multicast client mode:54-9
