April 2015
Intermediate to advanced
372 pages
6h 56m
Chinese
Content preview from SDN: 軟體定義網路
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
208 | 第 7 章：網路功能虛擬化
網路功能虛擬化，源自於前面介紹過的幾個網路營運問題，特別是網路設備廠商在平臺
作業系統中服務的影響。NFV 也適用於設備廠商，運作方式並不需要利用許多客戶，在
資料中心所看到的那些規模和創新技術。
許多大型服務供應商都有自己的雲端環境，因此可以假設自己也需要 VM 虛擬主機協調
流程。他們也緊跟 Intel 的 I/O 創新技術（VT-d，DDIO、DPDK 和 SR-IOV）。根據在
2012 年，秋季 Layer123 SDN 大會（德國，達姆施塔特）上的報告
1
，這些廠商正式聲
明他們對服務虛擬化的渴望，並圍繞在服務虛擬化的標準方面。這項工作最後在 ETSI
2
的贊助下完成。除了這份報告之外，服務供應商也不斷在預算方面反覆投票，支援商品
化、ODM 製造、附帶現成軟體的頂級交換機前進。廠商已經在幕後追蹤 COTS 平臺 I/O
效能的發展，並評估如寬頻網路閘道（Broadband Network Gateway，BNG)、平行電纜
一空間（CMTS）、移動領域 Node-B，以及其他服務面向的存取平臺及下一代服務設備
原則，以及大量服務元件所構成專有網路平臺的未來。
關於網路服務和功能的討論逐步發展成三大類：簡單虛擬服務、服務鏈結和服務或平臺
虛擬化。所有討論當中，都牽涉到 SDN 控制器，至少簡單虛擬服務中有少量牽涉，另
外兩類照理說也需要用到它。
虛擬化與資料平面 I/O
網路服務虛擬化，不一定就是包含每台 VM 虛擬主機的虛擬主機管理程式分區，它還可
能是： ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.