Configuration of Optional NTP Parameters 761n The procedures for configuring NTP authentication on the server are the same asthat on the client. Besides, the client and the server must be configured with thesame authentication key.Configuration ofOptional NTPParametersThe configurations of optional NTP parameters are:■ Setting the local clock as the NTP master clock■ Configuring the local VLAN interface that sends NTP packets■ Configuring the number of the dynamic sessions that can be established locally■ Disabling the VLAN interface configured on a switch from receiving NTPpackets■ Disabling NTP service globallyConfigure thespecified key to be atrusted keyntp-service reliableauthentication-keyid key-idRequiredBy default, an authentication key isnot a trusted keyEnter VLAN interfaceviewinterface interface-typeinterface-number-Associate a specifiedkey with thecorresponding NTPserverBroadcast server mode:ntp-service broadcast-serverauthentication-keyid key-id■ In NTP broadcast server modeand NTP multicast server mode,you need to associate thespecified key with thecorresponding NTP server onthe server■ You can associate an NTPserver with an authenticationkey while configuring a switchto operate in a specific NTPmode. You can also associatethem using this command afterconfiguring the NTP modewhere a switch is to operateMulticast server mode:ntp-service multicast-serverauthentication-keyid key-idTable 605 Configure NTP authentication on the serverOperation Command DescriptionTable 606 Configure optional NTP parametersOperation Command DescriptionEnter system view system-view -Configure the localclock as the NTPmaster clockntp-service refclock-master[ ip-address ] [ stratum ]OptionalConfigure the localinterface that sendsNTP packetsntp-service source-interfaceinterface-type interface-numberOptionalConfigure the numberof the sessions thatcan be establishedlocallyntp-servicemax-dynamic-sessions numberOptionalBy default, up to 100 dynamicsessions can be established locally.Enter VLAN interfaceviewinterface interface-typeinterface-number-
