iTable of Contents1 NTP Configuration ·····································································································································1-1NTP Overview ·········································································································································1-1Applications of NTP ·························································································································1-1Advantages of NTP ·························································································································1-3How NTP Works ······························································································································1-3NTP Message Format ·····················································································································1-4Operation Modes of NTP·················································································································1-5NTP Configuration Task List ···················································································································1-7Configuring the Operation Modes of NTP·······························································································1-8Configuring NTP Client/Server Mode ······························································································1-8Configuring the NTP Symmetric Peers Mode ·················································································1-9Configuring NTP Broadcast Mode·································································································1-10Configuring NTP Multicast Mode···································································································1-10Configuring Optional Parameters of NTP ·····························································································1-11Specifying the Source Interface for NTP Messages ·····································································1-11Disabling an Interface from Receiving NTP Messages·································································1-12Configuring the Maximum Number of Dynamic Sessions Allowed ···············································1-12Configuring Access-Control Rights ·······································································································1-13Configuration Prerequisites ···········································································································1-13Configuration Procedure················································································································1-13Configuring NTP Authentication············································································································1-14Configuration Prerequisites ···········································································································1-14Configuration Procedure················································································································1-14Displaying and Maintaining NTP···········································································································1-16NTP Configuration Examples················································································································1-16Configuring NTP Client/Server Mode ····························································································1-16Configuring the NTP Symmetric Mode··························································································1-17Configuring NTP Broadcast Mode·································································································1-19Configuring NTP Multicast Mode···································································································1-21Configuring NTP Client/Server Mode with Authentication·····························································1-24Configuring NTP Broadcast Mode with Authentication ·································································1-25
