H3C SDN Overlay技术白皮书

1 概述 ····················································································································································· 1 1.1 产生背景··············································································································································1 1.2 技术优点··············································································································································1 2 Overlay技术介绍··································································································································· 3 2.1 Overlay的概念介绍·······························································································································3 2.2 Overlay的解决方法·······························································································································3 3 Overlay技术实现··································································································································· 5 3.1 Overlay网络基础架构 ···························································································································5 3.2 Overlay网络部署需求 ···························································································································7 3.2.1 VXLAN网络和传统网络互通的需求 ···························································································7 3.2.2 VXLAN网络安全需求 ·················································································································7 3.2.3 Overlay网络虚拟机位置无关性··································································································8 3.2.4 Overlay与SDN的结合 ················································································································8 4 H3C SDN Overlay模型设计··················································································································9 4.1 H3C SDN Overlay模型设计 ·················································································································9 4.2 SDN控制器模型介绍 ··························································································································11 4.3 H3C SDN Overlay组件介绍 ···············································································································12 4.4 SDN Overlay网络与云对接 ················································································································13 4.4.1 SDN Overlay与OpenStack对接·······························································································14 4.4.2 SDN Overlay与基于OpenStack的增强云平台对接··································································15 4.4.3 SDN Overlay与非OpenStack云平台对接 ················································································16 4.5 服务链在Overlay网络安全中的应用···································································································16 4.5.1 什么是服务链 ··························································································································16 4.5.2 Overlay网络服务链节点描述····································································································17 4.5.3 服务链在Overlay网络安全中的应用························································································17 5 SDN Overlay组网方案设计················································································································· 19 5.1 SDN Overlay组网模型························································································································19 5.1.1 网络Overlay ····························································································································20 5.1.2 主机Overlay ····························································································································20 5.1.3 混合Overlay ····························································································································20 5.2 H3C SDN Overlay典型组网 ···············································································································20 5.2.1 网络Overlay ····························································································································20 ii 5.2.2 主机Overlay ····························································································································23 5.2.3 混合Overlay ····························································································································26 5.2.4 Overlay组网总结······················································································································26 6 SDN Overlay转发流程描述················································································································· 28 6.1 SDN Overlay流表建立和发布·············································································································28 6.1.1 流表建立流程对ARP的处理 ····································································································28 6.1.2 Overlay网络到非Overlay网络··································································································28 6.1.3 非Overlay网络到Overlay网络 ·································································································29 6.2 Overlay网络转发流程 ·························································································································29 6.2.1 Overlay网络到非Overlay网络··································································································30 6.2.2 非Overlay网络到Overlay网络 ·································································································31 6.3 Overlay网络虚机迁移 ·························································································································32 6.4 SDN Overlay升级部署方案 ················································································································33 6.4.1 SDN Overlay独立分区部署方案·······························································································33 6.4.2 IP GW旁挂部署方案 ················································································································34 6.4.3 核心升级， SDN Overlay独立分区 ··························································································35 6.4.4 Overlay网关弹性扩展升级部署································································································35 6.4.5 多数据中心同一控制器集群部署 ·····························································································36 7 SDN Overlay方案优势总结················································································································· 37