28Examples# Enable NTP authentication, specify the use of MD5 encryption algorithm, with the key ID of 37 and keyvalue of BetterKey. system-view[Sysname] ntp-service authentication enable[Sysname] ntp-service authentication-keyid 37 authentication-mode md5 BetterKey# Specify this key as a trusted key.[Sysname] ntp-service reliable authentication-keyid 37ntp-service source-interfaceSyntaxntp-service source-interface interface-type interface-numberundo ntp-service source-interfaceViewSystem viewDefault level3: Manage levelParametersinterface-type interface-number: Specifies an interface by its interface type and interface number.DescriptionUse the ntp-service source-interface command to specify the source interface for NTP messages.Use the undo ntp-service source-interface command to restore the default.By default, no source interface is specified for NTP messages, and the system uses the IP address of theinterface determined by the matched route as the source IP address of NTP messages.If you do not want the IP address of a certain interface on the local device to become the destinationaddress of response messages, use this command to specify the source interface for NTP messages sothat the source IP address in NTP messages is the primary IP address of this interface.Examples# Specify the source interface of NTP messages as VLAN-interface 1. system-view[Sysname] ntp-service source-interface vlan-interface 1ntp-service unicast-peerSyntaxntp-service unicast-peer [ vpn-instance vpn-instance-name ] { ip-address | peer-name }[ authentication-keyid keyid | priority | source-interface interface-type interface-number | versionnumber ] *undo ntp-service unicast-peer [ vpn-instance vpn-instance-name ] { ip-address | peer-name }ViewSystem view
