Stanford Seminar - Software-Defined Networking at the Crossroads

"Software-Defined Networking at the Crossroads" -Scott Shenker, University of California, Berkeley
Colloquium on Computer Systems Seminar Series (EE380) presents the current research in design, implementation, analysis, and use of computer systems. Topics range from integrated circuits to operating systems and programming languages. It is free and open to the public, with new lectures each week.


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0:00 Introduction
0:28 Co-Conspirators
2:32 Caveats and Clarifications
4:04 Architecture and Academia Don't Mix
4:33 Outline
7:49 What is the Root Cause?
8:48 The Two Networking "Planes"
9:54 Data Plane Abstractions: Layers
10:27 Layers Key to Internet's Success
11:26 Today's Control Plane: No Abstractions
12:39 Abstractions For Control Plane?
14:28 SDN: Two Control Plane Abstractions
15:05 SDN is "Layers" for Control Plane
15:52 Clean Separation of Concerns
17:05 Major Change in Paradigm
18:54 Looking Back After Five Years
20:44 The Role of Control Programs
22:06 Simple Example: Access Control
22:57 Network Virtualization
23:44 Virtualization Simplifies Control Program
24:27 Software Defined Network
24:58 Virtualization is Killer App for SDN
25:59 Long-Term Implications
27:52 Homogeneous Network
28:16 Three Important Logical Interfaces
29:48 How Are These Interfaces Implemented?
31:02 Incorporate MPLS Approach into SDN
32:00 Claim #1: Core Can Focus on Delivery
36:01 Software Switches Quite Common
37:04 Software Switches Getting Faster
38:09 Claim #2: Edge Can Use Software
38:26 Examples
39:15 Software vs Hardware
40:01 Long-Term Opportunity
42:53 The Myth of the Internet's Dataplane
43:03 The Reality of the Internet's Dataplane
43:35 Middleboxes As Common As Switches
44:02 Four Important Facts
45:25 One Inescapable Conclusion
48:58 How Did We Get Here?
50:25 Why Is Software Forwarding Better?
54:04 SDN and Networking at the Crossroads