NTP Configuration Commands 939Example# Enable NTP authentication, adopt MD5 encryption, and designate Key 37BetterKey and configure it as reliable. system-viewSystem View: return to User View with Ctrl+Z.[SW8800] ntp-service authentication enable[SW8800] ntp-service authentication-keyid 37 authentication-modemd5 BetterKey[SW8800] ntp-service reliable authentication-keyid 37ntp-servicesource-interfaceSyntaxntp-service source-interface interface-type interface-numberundo ntp-service source-interfaceViewSystem viewParameterinterface-type: Specifies the interface type and determine an interface with theinterface-number argument.interface-number: Specifies the interface number and determine an interface withthe interface-type argument.DescriptionUse the ntp-service source-interface command to designate an interface totransmit NTP message.Use the undo ntp-service source-interface command to cancel the currentsetting.By default, the source address specifies where the packets are transmitted from.You can use this command to designate an interface to transmit all the NTPpackets and take the source address of these packets from its IP address. If you donot want any other interface to receive the acknowledgement packets, use thiscommand to specify one interface to send all the NTP packets.Example# Configure all the outgoing NTP packets to use the IP address of Vlan-Interface1as their source IP address. system-viewSystem View: return to User View with Ctrl+Z.[SW8800] ntp-service source-interface Vlan-Interface 1ntp-service unicast-peer Syntaxntp-service unicast-peer ip-address [ version number ] [ authentication-keyidkeyid ] [ source-interface interface-type interface-number ] [ priority ]*undo ntp-service unicast-peer ip-address
