WAN Virtualization Looking beyond Point to Point Circuits

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1 WAN Virtualization Looking beyond Point to Point Circuits Inder Monga Chief Technologist & Area Lead Energy Sciences Network Lawrence Berkeley National Lab Special Symposia on Cloud Computing II. Network Virtualization March 17 th, OFC/NFOEC 2013

2 Fundamental Network Abstraction: a end-to-end circuit At all layers of the network Wavelength, PPP, MPLS LSP, L2TP, GRE, PW A Z Switching points, store and forward, transformation Simple, Point-to-point, Provisionable 6/18/13 Inder Monga OFC/NFEC,

3 New Network Abstraction: WAN Virtual Switch WAN Virtual Switch Abstract Network Model Simple, Multipoint, Programmable Configuration abstraction: Expresses desired behavior Hides implementation on physical infrastructure It is not only about the concept, but implementation is key 6/18/13 3

4 Thought experiment: Build an N-port virtual switch for a collaboration CERN T1 mile s kms France Italy UK Netherlands Germany Spain Nordic USA New York USA - Chicago Canada BC Taiwan Source: Bill Johnston The LHC Open Network Environment (LHCONE) WAN Virtual Switch LHC Tier 2 Analysis Centers 6/18/13 Inder Monga OFC/NFEC,

5 Client-driven Flow Routing replaces static Routing policies Science Flow1: Science Flow2: Science Flow3: App 1 App WAN Virtual Switch 2 OF Ctrl. OF Ctrl. Lab A Multi-Domain Wide Area Network Cloud #1 SC#1 Combine distributed enforcement of Routing Policy to a single logical entity 6/18/13 Inder Monga OFC/NFEC, App 1 App 2

6 Dynamic, multiple virtual switches for Cloud and other on-demand applications DC#1 Corp HQ WAN WAN Virtual Virtual Switch WAN Virtual Switch WAN Virtual Switch WAN Virtual Switch Switch Multi-Domain Wide Area Network Cloud #1 Cloud #2 DC#2 Cloud #3 Virtual Switches can be as dynamic as your Cloud 6/18/13 Inder Monga OFC/NFEC,

7 Recursive Nature: Horizontally and Vertically WAN Virtual Switch DC#1 Cloud #1 Corp HQ Layer 2 Layer 1 Layer 2 Cloud #2 DC#2 Cloud #3 6/18/13 Inder Monga OFC/NFEC,

8 Layer-based representation User SDN Controller OpenFlow Customer/User Control Plane Policy and Isolation WAN Virtual Switch Programmable service provisioning plane OpenFlow and Legacy control plane East- West Interface Multi-domain Network OS: SDN Control Plane End-to-End Dataplane Creation of a programmable network provisioning layer Sits on top of the network OS 6/18/13 Inder Monga OFC/NFEC,

9 SC12 Demonstration Physical Topology DTNs Ciena booth SRS OSCARS virtual circuits NEC LBL DTNs: Data Transfer Nodes 6/18/13 Inder Monga OFC/NFEC,

10 StarLight BNL LBNL ANL NYC SUNN NERSC HOUS ESnet 10G OpenFlow Testbed 6/18/13 10

11 Summary Motivation Powerful network abstraction makes it easier for complex application and collaboration interactions Files/Storage Simplicity Simplicity for the end-site Works with off-the-shelf, open-source controller Topology simplification Generic code for the network provider Virtual switch can be layered over optical, routed or switched network elements OpenFlow support needed on edge devices only, core stays same Programmability for applications Allows end-sites to innovate and use the WAN effectively Architecture OpenFlow at the edge to start with, can upgrade the core opportunistically 6/18/13 Inder Monga OFC/NFEC,

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