H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – NTP

H3C S7500E Series Ethernet Switches Table of Contents

Table of Contents

Chapter 1 NTP Configuration....................................................................................................... 1-1

1.1 NTP Overview.................................................................................................................... 1-1

1.1.1 Applications of NTP................................................................................................. 1-1

1.1.2 How NTP Works...................................................................................................... 1-2

1.1.3 NTP Message Format ............................................................................................. 1-3

1.1.4 Operation Modes of NTP ........................................................................................ 1-5

1.1.5 Multiple Instances of NTP ....................................................................................... 1-7

1.2 Configuring the Operation Modes of NTP ......................................................................... 1-8

1.2.1 Configuring NTP Server/Client Mode...................................................................... 1-9

1.2.2 Configuring the NTP Symmetric Mode ................................................................. 1-10

1.2.3 Configuring NTP Broadcast Mode ........................................................................ 1-11

1.2.4 Configuring NTP Multicast Mode .......................................................................... 1-12

1.3 Configuring the Local Clock as a Reference Source....................................................... 1-13

1.4 Configuring Optional Parameters of NTP ........................................................................ 1-14

1.4.1 Configuring the Interface to Send NTP Messages................................................ 1-14

1.4.2 Disabling an Interface from Receiving NTP Messages......................................... 1-14

1.4.3 Configuring the Maximum Number of Dynamic Sessions Allowed....................... 1-14

1.5 Configuring Access-Control Rights.................................................................................. 1-15

1.5.1 Configuration Prerequisites................................................................................... 1-15

1.5.2 Configuration Procedure ....................................................................................... 1-15

1.6 Configuring NTP Authentication ...................................................................................... 1-16

1.6.1 Configuration Prerequisites................................................................................... 1-16

1.6.2 Configuration Procedure ....................................................................................... 1-17

1.7 Displaying and Maintaining NTP...................................................................................... 1-18

1.8 NTP Configuration Examples .......................................................................................... 1-19

1.8.1 Configuring NTP Server/Client Mode.................................................................... 1-19

1.8.2 Configuring the NTP Symmetric Mode ................................................................. 1-20

1.8.3 Configuring NTP Broadcast Mode ........................................................................ 1-22

1.8.4 Configuring NTP Multicast Mode .......................................................................... 1-24

1.8.5 Configuring NTP Server/Client Mode with Authentication .................................... 1-27

1.8.6 Configuring NTP Broadcast Mode with Authentication......................................... 1-29