December 2015
Intermediate to advanced
920 pages
23h 28m
English
Content preview from MPLS in the SDN Era
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.
Chapter 12. Network Function Virtualization
Chapter 11—which is dedicated to Network Virtualization Overlays (NVO)—described a modern paradigm for the integration of virtual machines (VMs), containers, and bare-metal servers in a (private, public, or telco) cloud. The resulting overlay provides connectivity between subscribers and VMs, or between different VMs. The latter are typically servers, which behave like IP endpoints. Subscribers also behave like IP endpoints, therefore a typical service example would be a TCP session between a subscriber client and a VM acting as a database server (or a web server) in the cloud.
Network Function Virtualization (NFV) takes advantage of NVO by allowing VMs (or containers) to actually perform a network service function. These VMs are typically in-line and instead of acting as communication endpoints, they are transit devices, with a left and a right interface. There are many examples of such network service functions: stateful firewalling, Network Address Translation (NAT), load balancing, Distributed Denial-of-Service (DDoS) detection and mitigation, Deep Packet Inspection (DPI), Intrusion Detection and Prevention (IDS/IDP), IPSec/TLS tunnel termination, proxy functions, and so on.
Note
Throughout this chapter, every time you see the term VM, you can think of either a VM or a container. Network functions can be implemented on any of these virtual compute entities (and on physical devices, too).
Depending on the actual service provided ...
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.