January 2023
Intermediate to advanced
458 pages
14h 16m
Chinese
Content preview from 可编程网络自动化
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1
第 1 章
网络行业发展趋势
本书从
SDN
的兴起开始，带领你了解基础性话题，为你开启网络可编程性和自动化之旅。
本章围绕
SDN
、
SDN
的相关技术及其对于当今网络世界的影响
，透视了网络行业的发展
趋势。下面先来回顾一下软件定义网络是如何跻身主流并最终催生了网络可编程性和自动
化的趋势。
1.1
SDN
的兴起
如果非要将这些年网络产业的种种变革和某个人联系到一起，那么此人非
Martin Casado
莫属，他目前是
Andreessen Horowitz
公司的普通合伙人和风险投资家。
Casado
曾担任过
VMware Fellow
1
、高级副总裁以及
VMware
网络和安全事业部的总经理。他对业内产生了
深远的影响，不仅一手打造了像
OpenFlow
和
Nicira
这样的产品
，而且让众多的网络从
业者眼界大开，意识到网络运维、敏捷性和可管理性的变革迫在眉睫。下面听我们逐一
道来。
1.1.1
OpenFlow
不管怎么说，
OpenFlow
都是软件定义网络运动的第一个主要协议。
OpenFlow
是
Martin
Casado
于斯坦福大学攻读博士期间
，在
Nick McKeown
指导下设计的协议。
OpenFlow
只
是一个将网络设备的控制平面（
control
plane
）和数据平面（
data plane
）解耦的协议（参见
图
1-1
）
。简而言之，控制平面可以被看作网络设备的
大脑
，数据平面则可以被看作负责转
发数据包的
硬件
或者
专用集成电路
（
Application-specific Integrated Circuit
，
ASIC
）。
注
1
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.