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ESCC & Internet2 Joint Techs WorkshopMadison, Wisconsin.July 16-20, 2006

Network Virtualization & Hybridization

Thomas NdousseDOE, Office of Science

Welcome

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IP

Real-time Trafficburst Traffic D

ata

Traf

fic

voice Traffic

wireless

T1

EthernetATM

SONET

DWDMSatellite

Video Streaming

Soliton

The Internet – One of the greatest achievement of the 20-th century

The Internet must evolve, innovate, and scale to to meet increasing ubiquity

Ossification – Difficult to introduce new innovations in the network

The Internet: The Evolving Global Network Infrastructure

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Original Design Expectations Current Operational Expectations

Research infrastructure Commerce, defense, science, Health, education, transportation,

national security, etc Best-effort, shared resources Guaranteed bandwidth, dedicated

channels, VLANs, VPNs, MPLS, GMPLS, quality of service

Twisted pair copper Fiber optics, free-space optics, wireless, satellite, WiFi. WiMax

Single flow throughput: 9.6, 56kbps, 10 Mbps

100 Mbps, ~Gbps, ~Tbps

Transport stack: TCP Zero-copy, off-load engines, RDMA,

Data traffic Data, voice, streaming video, Real-time, etc

Single flow throughput: 9.6, 56Kbps, 10 Mbps

100 mbps, ~Gbps, ~Tbps

The Internet: then, Now, & tomorrow

Simple System

Complex System

Ubiquitous System

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Network Virtualization Virtualization attempts to solve the ossification problem

by allowing multiple virtual networks to co-exist within a shared infrastructure

Emerging Network Virtualization

Why? De-ossification - expand or eliminate the neck of the IP

hourglass

Attempt to understand and manage large-scale network complexities

Stimulate research and innovations through deployment and testing of disruptive network technologies

Accommodate the requirements of diverse types of applications, especially high-end science applications

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PlanetLab – Larry Peterson, Scott Shenker, Jon Turner A geographically distributed platform for deploying,

evaluating, and accessing planetary-scale network services A blueprint for future Internet Platform for testing disruptive technologies before adoption

GINI (Global Environment for Networking Innovations ) Beyond existing packet and circuit switching technologies

Building security into network architecture and protocol primitives

Towards a network science - Network architecture theories, the Internet as a complex system

Overcoming Ossification and Complexity

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Topological Representation of Network Virtualization (PlanetLab)

Source: PlanetLab and NSF GENI Workshop Report

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Layer 2Vnet #1

Layer 4Vnet #2

Layer 2Vnet #3

Layer 3Vnet #n

• Each virtual Net (Vnet) is an independent network that operates in a protected partition

• Inter-Vnet communication is allowed at the shared node

• Vnet #0 is designated as the network that performs the control and management

• Vnets can acquire and release resources to the main network infrastructure (dynamically?)

Net #0Control Net

Expectations of Network Virtualization

Main Network

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Layer 2

Layer 3

Layer 2

Layer 1

Lay

er 5

, 6, 7

Layer 1

Layer 2

Layer 3

Vnet #1 Vnet #2 Vnet #3 Vnet #4

Con

trol

and

M

anag

emen

t

Layer 4

Layered Approach to Network Virtualization

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Hybrid Network Model 11. Vnet is carved from the main

backbone network

2. Resources can be exchanged between the Vnet and the main network

Vnet(Circuit-Based)

Main Network(IP-Based)

Hybrid Networks Model 21. Vnet and the main network are

two independent networks

2. No resource exchanged between the two networks

Vnet(Circuit-Based)

Main Network(IP-Based)

Hybrid Network: Minimum Implementation of Network Virtualization

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A

B

F

ED

G

CRouting Functions

SwitchingFunctions

Hybrid Node FunctionInput Output

Routing Routing Routing Switching Switching Routing Switching Switching

Hybrid Node ControlInput Output

MPLS MPLS MPLS e-GMPLS e-GMPLS MPLS E-GMPLS e-GMPLS

e-GMPLS:GMPLS with scheduling and reservation extensions

Data Plane Technologies: MPLS, Layer 2 VLANs, Layer 3, SONET, WDWM

Hybrid Network Node Functions and Capabilities

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Peering Issues of Hybrid Networks

A

B

F

ED

G

C A

B

F

ED

G

C

Hybrid Net AHybrid Control Plane

MPLS

e-GMPLS

MPLS

e-GMPLS

Hybrid Net BHybrid Control Plane

MPLS

e-GMPLS

MPLS

e-GMPLS

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Hybrid Network Research and Engineering Issues

Hybrid Network Theory and Foundation Hybrid network architecture Hybrid network node capabilities, functions, signaling,

and control Hybrid network traffic engineering and network

management

Inter-Domain Issues for Hybrid Networks Hybrid network taxonomy – Common terminologies

and capabilities Multi-domain control plane: engineering, policies,

authentication Hybrid network security issues: vulnerabilities of

control planes, Circuit authentication Hybrid network monitoring, performance measurement

and prediction

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Ossification is a problem across all federal agencies (DOE, DARPA, NSA, etc)

GENI is NSF’s view of the problem – A multi-agency approach to the problem is critical

Contribution from the science community is especially critical

LSN Workshop – The Future of Internet and Experiential Facilities Design, July 24-25, 2006

Inter-Agency View of Network Ossification & Virtualization

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Questions?