1-13Configuring NTP authentication on the serverFollow these steps to configure NTP authentication on the server:To do… Use the command… RemarksEnter system view system-view —Enable NTP authentication ntp-service authenticationenableRequiredDisabled by default.Configure an NTPauthentication keyntp-serviceauthentication-keyid key-idauthentication-mode md5valueRequiredBy default, no NTPauthentication key isconfigured.Configure the specified key as atrusted keyntp-service reliableauthentication-keyid key-idRequiredBy default, no trustedauthentication key isconfigured.Enter VLAN interface view interface Vlan-interface vlan-id —Configure on theNTP broadcastserverntp-service broadcast-serverauthentication-keyid key-idAssociatethe specifiedkey with thecorrespondingbroadcast/multicast clientConfigure on theNTP multicastserverntp-service multicast-serverauthentication-keyid key-idz In NTP broadcast servermode and NTP multicastserver mode, you need toassociate the specifiedkey with thecorrespondingbroadcast/multicast clientz You can associate anNTP broadcast/multicastclient with anauthentication key whileconfiguring NTP mode.You can also use thiscommand to associatethem after configuring theNTP mode.The procedure for configuring NTP authentication on the server is the same as that on the client.Besides, the client and the server must be configured with the same authentication key.Configuring Optional NTP ParametersComplete the following tasks to configure optional NTP parameters: