iTable of Contents1 NTP Configuration ·····································································································································1-1NTP Overview ·········································································································································1-1Applications of NTP ·························································································································1-1Advantages of NTP ·························································································································1-1How NTP Works ······························································································································1-2NTP Message Format ·····················································································································1-3Operation Modes of NTP·················································································································1-4NTP Configuration Task List ···················································································································1-6Configuring the Operation Modes of NTP·······························································································1-6Configuring NTP Client/Server Mode ······························································································1-7Configuring the NTP Symmetric Peers Mode ·················································································1-8Configuring NTP Broadcast Mode···································································································1-9Configuring NTP Multicast Mode·····································································································1-9Configuring Optional Parameters of NTP ·····························································································1-10Specifying the Source Interface for NTP Messages ·····································································1-10Disabling an Interface from Receiving NTP Messages·································································1-11Configuring the Maximum Number of Dynamic Sessions Allowed ···············································1-11Configuring Access-Control Rights ·······································································································1-12Configuration Prerequisites ···········································································································1-12Configuration Procedure················································································································1-12Configuring NTP Authentication············································································································1-13Configuration Prerequisites ···········································································································1-13Configuration Procedure················································································································1-13Displaying and Maintaining NTP···········································································································1-15NTP Configuration Examples················································································································1-15Configuring NTP Client/Server Mode ····························································································1-15Configuring the NTP Symmetric Mode··························································································1-16Configuring NTP Broadcast Mode·································································································1-18Configuring NTP Multicast Mode···································································································1-19Configuring NTP Client/Server Mode with Authentication·····························································1-21Configuring NTP Broadcast Mode with Authentication ·································································1-22
