SNR S2989G-48TX-RPS — настройка управления временем в сети с помощью NTP [483/553]

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S2989G-24TX Operation Manual

Chapter 9 Network Time Management Configuration

9-3

the network must be properly configured. There should be reachable route between any

switch and the two SNTP/NTP servers.

Example: Assume the IP addresses of the SNTP/NTP servers are 10.1.1.1 and 20.1.1.1,

respectively, and SNTP/NTP server function (such as NTP master) is enabled, then

configurations for any switch should like the following:

Switch#config

Switch(config)#sntp server 10.1.1.1

9.2

NTP

9.2.1

Introduction to NTP Function

The NTP (Network Time Protocol) synchronizes timekeeping spans WAN and LAN

among distributed time servers and clients, it can get millisecond precision. The

introduction of event, state, transmit function and action are defined in RFC-1305.

The purpose of using NTP is to keep consistent timekeeping among all clock-

dependent devices within the network so that the devices can provide diverse

applications based on the consistent time.

For a local system running NTP, its time can be synchronized by other reference

sources and can be used as a reference source to synchronize other clocks, also can

synchronize each other by transmit NTP packets.

9.2.2

NTP Function Configuration Task List

1. To enable NTP function

2. To configure NTP server function

3. To configure the max number of broadcast or multicast servers supported by the NTP

client

4. To configure time zone

5. To configure NTP access control list

6. To configure NTP authentication

7. To specified some interface as NTP broadcast/multicast client interface

8. To configure some interface can’t receive NTP packets

9. To configure the request packet sending interval of ntp client

10. Display information

11. Debug

1. To enable NTP function