Operation Manual – NTPH3C S3100 Series Ethernet Switches Chapter 1 NTP Configuration1-15Operation Command DescriptionConfigure an NTPauthentication keyntp-serviceauthentication-keyidkey-idauthentication-modemd5 valueRequiredBy default, no NTPauthentication key isconfigured.Configure the specifiedkey as a trusted keyntp-service reliableauthentication-keyidkey-idRequiredBy default, no trustedauthentication key isconfigured.Enter VLAN interfaceviewinterfaceVlan-interface vlan-id —Configureon theNTPbroadcastserverntp-servicebroadcast-serverauthentication-keyidkey-idAssociatethespecifiedkey withthecorrespondingbroadcast/multicastclientConfigureon theNTPmulticastserverntp-servicemulticast-serverauthentication-keyidkey-idz In NTP broadcast servermode and NTP multicastserver mode, you need toassociate the specified keywith the correspondingbroadcast/multicast clientz You can associate an NTPbroadcast/multicast clientwith an authentication keywhile configuring NTPmode. You can also usethis command to associatethem after configuring theNTP mode.Note:The procedure for configuring NTP authentication on the server is the same as that onthe client. Besides, the client and the server must be configured with the sameauthentication key.1.6 Configuring Optional NTP ParametersTable 1-13 Optional NTP parameters configuration tasksTask RemarksConfiguring an Interface on the Local Switch to Send NTPmessages OptionalConfiguring the Number of Dynamic Sessions Allowed on the LocalSwitch OptionalDisabling an Interface from Receiving NTP messages Optional
