电信科学 ›› 2022, Vol. 38 ›› Issue (8): 171-177.doi: 10.11959/j.issn.1000-0801.2022092

• 工程与应用 • 上一篇    下一篇

运营商级SD-WAN组网NTP时钟同步方案

赵乾艮, 王羽, 汤凌, 颜永明   

  1. 中国电信股份有限公司上海分公司,上海 200085
  • 修回日期:2022-04-06 出版日期:2022-08-20 发布日期:2022-08-01
  • 作者简介:赵乾艮(1991- ),男,中国电信股份有限公司上海分公司工程师,主要研究方向为网络安全、SDN等
    王羽(1980- ),男,中国电信股份有限公司上海分公司助理工程师,主要研究方向为数据网络、SDN等
    汤凌(1986- ),男,中国电信股份有限公司上海分公司助理工程师,主要研究方向为数据网络、SDN等
    颜永明(1978- ),男,中国电信股份有限公司上海分公司信息网络部综合运营监控中心经理、正高级工程师,主要研究方向为数据网络、云组网等

Carrier-grade NTP clock synchronization scheme of SD-WAN network

Qiangen ZHAO, Yu WANG, Ling TANG, Yongming YAN   

  1. Shanghai Branch of China Telecom Co., Ltd., Shanghai 200085, China
  • Revised:2022-04-06 Online:2022-08-20 Published:2022-08-01

摘要:

摘 要:SD-WAN 发展势头迅猛,电信运营商与互联网企业都在不断扩大布局。作为形态多样化的技术, SD-WAN 中并未对时钟同步做出明确规范。分析了时钟同步对 SD-WAN 技术实现和业务运行的重要性。简述了在SD-WAN被广泛采用的互联网公共NTP服务时钟同步方案的利弊,由此展开讨论在不同场景可实现的自建NTP服务时钟同步方案,并设计了基于自建NTP服务利用管理隧道加密传输NTP同步数据的时钟同步方法,使SD-WAN平台和设备在时间同步时获得更高的安全性与稳定性。

关键词: SD-WAN, 时钟同步, IPSec隧道, DTLS隧道

Abstract:

SD-WAN is developing rapidly, and telecom operators and Internet companies are constantly expanding their layout.As a technology with diverse forms, SD-WAN has not made a clear specification for clock synchronization.The importance of clock synchronization to SD-WAN technology implementation and business running was analyzed.The advantages and disadvantages of the clock synchronization scheme of Internet public NTP service widely used in SD-WAN realizations were sketched.Thus the clock synchronization scheme of self-built NTP service in different scenarios was discussed.Furthermore, a clock synchronization method using management tunnel to transmit encrypted NTP synchronization data was designed, which made SD-WAN platform and devices obtain higher security and stability in time synchronization.

Key words: SD-WAN, time synchronization, IPSec tunnel, DTLS tunnel

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