2025年SDWAN技术白皮书-新华三

SDWAN 技术白皮书 Copyright © 2025 新华三技术有限公司 版权所有，保留一切权利。 非经本公司书面许可，任何单位和个人不得擅自摘抄、复制本文档内容的部分或全部，并不得以任何形式传播。 除新华三技术有限公司的商标外，本手册中出现的其它公司的商标、产品标识及商品名称，由各自权利人拥有。 本文中的内容为通用性技术信息，某些信息可能不适用于您所购买的产品。 i 目 录 1 概述·························································································································································· 1 1.1 产生背景 ··············································································································································· 1 1.2 技术优点 ··············································································································································· 1 2 SDWAN 技术实现 ···································································································································· 2 2.1 网络模型 ··············································································································································· 2 2.2 TTE······················································································································································· 3 2.3 SDWAN 报文封装格式 ························································································································· 4 2.4 BGP 扩展 ·············································································································································· 5 2.5 通道建立 ··············································································································································· 7 2.5.2 管理通道 ···································································································································· 8 2.5.3 控制通道 ···································································································································· 8 2.5.4 数据通道 ···································································································································· 9 2.6 路由信息发布 ········································································································································ 9 2.7 报文转发 ············································································································································· 10 2.8 VPN 实例和租户隔离 ·························································································································· 11 2.9 Overlay 灵活拓扑 ································································································································ 11 2.10 IPsec 保护 SDWAN 隧道 ·················································································································· 13 2.10.1 SA 简介 ·································································································································· 13 2.10.2 SA 生成方式与交互 ························································