Software Defined Networking and Network Virtualization

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Motivation Software Defined Networking (SDN) Network Virtualization Use Cases Deployment on University Campuses Cloud IaaS Platform

Software Defined Networking and Network

Virtualization

Aryan TaheriMonfared

aryan.taherimonfared@uis.no

October 02, 2013

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Agenda

1 Motivation

2 Software Defined Networking (SDN)

Definition

What is OpenFlow?

Advantages

Disdvantages

3 Network Virtualization

Definition

4 Use Cases

5 Deployment on University Campuses

Challenges

Stakeholders

How?

Examples

6 Cloud IaaS Platform

Bird View

Data Centre View

Networking inside a Rack

Tenant Network Logical View

Challenges

Examples

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Outline

1 Motivation

2 Software Defined Networking (SDN)

Definition

What is OpenFlow?

Advantages

Disdvantages

3 Network Virtualization

Definition

4 Use Cases

5 Deployment on University Campuses

Challenges

Stakeholders

How?

Examples

6 Cloud IaaS Platform

Bird View

Data Centre View

Networking inside a Rack

Tenant Network Logical View

Challenges

Examples

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Traditional Data Network

Functionality implemented in dedicated appliance or ASIC

Proprietary appliances/APIs

Individual configuration

Time consuming/error prone configuration

Automating tasks by (home-grown) scripts

Lack of communication between application & network

Slow & costly service innovation

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Definition What is OpenFlow? Advantages Disdvantages

Outline

1 Motivation

2 Software Defined Networking (SDN)

Definition

What is OpenFlow?

Advantages

Disdvantages

3 Network Virtualization

Definition

4 Use Cases

5 Deployment on University Campuses

Challenges

Stakeholders

How?

Examples

6 Cloud IaaS Platform

Bird View

Data Centre View

Networking inside a Rack

Tenant Network Logical View

Challenges

Examples

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Problem?

Nick McKeown See references.

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Definition

What is OpenFlow? Advantages Disdvantages

What is Software Defined Networking?

Separating the control plane from the forwarding plane physically.

Controlling several forwarding devices with single control plane.

Making clear the distributed systems problem.

(⇒ Solve the problem once!)

Configuring flows from global view.

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What is Software Defined Networking?

SDN is a mechanism not a solution

Provides: more control, better guarantees, NOT necessarily

simplicity

Can be combined with backup path/other decision-making process

Implementations: SANE, Ethane, OpenFlow

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Definition What is OpenFlow? Advantages Disdvantages

SDN is based on Abstraction

Forwarding Abstraction:

OpenFlow API ∼ x86 instruction set

State Distribution Abstraction:

Single state distribution mechanism, well-known convergence

properties, re-usable

_{(new protocol 9 new state distribution mech.)}

Specification Abstraction:

Interacting with network as a single device

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What is OpenFlow?

Network Operating Systems convey configuration of global network

view to actual physical devices

One possible definition of how to model the configuration of a

physical device

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Definition

What is OpenFlow?

Advantages Disdvantages

Traditional Switch

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OpenFlow Capable Switch

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Definition

What is OpenFlow?

Advantages Disdvantages

OpenFlow Capable Switches

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Distributed OpenFlow Controller

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Definition What is OpenFlow?

Advantages

Disdvantages

Pros:

Global view of network demands and fabric resource

Makes it easier to control diverse switches

Deterministic and dynamic flow placement

Efficient provisioning/releasing resources

⇒ Faster convergence

⇒ Higher utilization

⇒ More fault-tolerant

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Cons:

OpenFlow is in early stages

Controllers are not mature yet

Upgrading HW/SW is required

Flow programming is not simple/fast

Northbound APIs in controllers are not standard (Adapting the same

application to different controllers)

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Definition

Outline

1 Motivation

2 Software Defined Networking (SDN)

Definition

What is OpenFlow?

Advantages

Disdvantages

3 Network Virtualization

Definition

4 Use Cases

5 Deployment on University Campuses

Challenges

Stakeholders

How?

Examples

6 Cloud IaaS Platform

Bird View

Data Centre View

Networking inside a Rack

Tenant Network Logical View

Challenges

Examples

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What is Network Virtualization?

Faithful logical reproduction of physical network services.

Decoupling the (virtual) network services from the physical network.

Coexistence of multiple virtual networks on the same physical

substrate.

Simplifies administration.

It’s a solution.

SDN can be used for building Virtualized Networks.

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Outline

1 Motivation

2 Software Defined Networking (SDN)

Definition

What is OpenFlow?

Advantages

Disdvantages

3 Network Virtualization

Definition

4 Use Cases

5 Deployment on University Campuses

Challenges

Stakeholders

How?

Examples

6 Cloud IaaS Platform

Bird View

Data Centre View

Networking inside a Rack

Tenant Network Logical View

Challenges

Examples

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SDN/VN Use-cases

Deployment on university campuses

WAN optimization

Flexible virtualization platform

Security services

Bandwidth on demand applications

Multipath networking for higher utilization and efficiency

Network administration

Mobility

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Challenges Stakeholders How? Examples

Outline

1 Motivation

2 Software Defined Networking (SDN)

Definition

What is OpenFlow?

Advantages

Disdvantages

3 Network Virtualization

Definition

4 Use Cases

5 Deployment on University Campuses

Challenges

Stakeholders

How?

Examples

6 Cloud IaaS Platform

Bird View

Data Centre View

Networking inside a Rack

Tenant Network Logical View

Challenges

Examples

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Challenges in University Campus Network

Diverse use-cases: vending and training machines, fire alarms,

monitoring systems, BYOD, mission critical systems, innovation

infra. etc.

Diverse requirements: secure communication, openness,

virtualization, etc.

Vertical integration: Network HW, OS, and applications are tightly

integrated in a single product

Lack of open standard APIs: Inflexible home-grown scripts

High costs: WiFi, Videos, Big Data-Large Bandwidth

Mismatch between innovation pace in computing and networking

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Challenges

Stakeholders

How? Examples

Who will benefit from?

Campus Central IT: Operation efficiency

Networking Research Community: Using slices of production

network

Research Community (with huge datasets): High energy physics,

Bioinformatics, etc.

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How can you benefit from?

Virtualization: Virtual networks independent of underlying

L1/L2/L3

Advanced Forwarding

Programmability: Developing other applications on top

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Challenges Stakeholders How? Examples

Examples:

Disaster recovery

On-demand provisioning/de-provisioning of network slices

Multipath TCP (e.g. Large volume data transfer)

Compliant virtualized networks (e.g. Payment Card Industry Data

Security Standard (PCI DSS) for POS)

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Outline

1 Motivation

2 Software Defined Networking (SDN)

Definition

What is OpenFlow?

Advantages

Disdvantages

3 Network Virtualization

Definition

4 Use Cases

5 Deployment on University Campuses

Challenges

Stakeholders

How?

Examples

6 Cloud IaaS Platform

Bird View

Data Centre View

Networking inside a Rack

Tenant Network Logical View

Challenges

Examples

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Bird View

Data Centre View Networking inside a Rack Tenant Network Logical View Challenges

Examples

Multiple Cells

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Single Cell

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Bird View Data Centre View

Networking inside a Rack

Tenant Network Logical View Challenges

Examples

Inside a Rack

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Inside a Compute Node

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Bird View Data Centre View Networking inside a Rack

Tenant Network Logical View

Challenges Examples

Network Logical View

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Any Networking Challenges?

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Bird View Data Centre View Networking inside a Rack Tenant Network Logical View

Challenges

Examples

Any Networking Challenges?

Yes, lots of them :)

Deployment complexity

Maintenance cost

Tenant’s network isolation and end-to-end connectivity

Tenant’s traffic monitoring

Security enforcement

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Any Networking Challenges?

Yes, lots of them :)

Deployment complexity

Maintenance cost

Tenant’s network isolation and end-to-end connectivity

Tenant’s traffic monitoring

Security enforcement

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Bird View Data Centre View Networking inside a Rack Tenant Network Logical View Challenges

Examples

OpenFlow Enabled Cloud Infrastructure

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Cloud Infrastructure Monitoring 1

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Examples

Cloud Infrastructure Monitoring 2

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Cloud Infrastructure Quarantine Zone

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Examples

Take home!

SDN is about abstraction (Building GUI using assembly is hard)

You can think of any application (All use-cases of a programming

language?)

Watch open-source projects

(OpenVSwitch, OpenDayLight, Mininet, RouteFlow, ...)

Simulate network, Control with OFC, Move to physical lab, Move to

production

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References

http://www.sciencedirect.com/science/article/pii/S1389128609003387

http://yuba.stanford.edu/foswiki/pub/OpenFlow/Deployment/CampusMeeting06152011/Stanford_OpenFlow.pdf http://www.sdncentral.com/sdn- use- cases/

http://www.youtube.com/user/stanfordopenflow www.stanford.edu/~nikhilh/pubs/handigol-acld10.pdf http://www.openflow.org/wk/index.php/OpenFlow_Wireless https://github.com/OPENNETWORKINGLAB/flowvisor/wiki http://www.openflow.org/downloads/technicalreports/openflow- tr- 2009- 1- flowvisor.pdf https://storage.cloud.google.com/networking/SDN/GoogleSDN.pdf

http://www.sdncentral.com/sdn- use- cases/

http://www.openflowhub.org/blog/blog/2012/12/03/sdn- use- case- multipath- tcp- at- caltech- and- cern/ http://www.opennetsummit.org/pdf/2013/market_opps/sdn_valuechain.pdf

http://www.opennetsummit.org/pdf/2013/presentations/nick_mckeown.pdf An attempt to motivate and clarify Software-Defined Networking (SDN) A Case for Expanding OpenFlow/SDN DeploymentsOn University Campuses