Software defined networking introduction

Guide By: Prepared By:
Prof. Ankita Desai Soni Ekta Pravinchandra
Prof. Jenis Lavji (201704101510001)
M.TECH(Computer)
3rd sem
8/23/2018 1

Outlines
 Introduction
Working of Conventional Networking
What is SDN?
 Difference between Conventional Networking and SDN
 SDN Architecture
 Network Applications
 Issues in Data Center
 Issues in SDN
 Tentative Problem Statements
 Conclusion
 Future work Plan
 References
 Acronyms
8/23/2018 2

Working of Conventional Networking
8/23/2018 3
Fig 1 [10] Fig 2 [10]
No Connection between computers Connection is possible by Plugin cables but not scalable

(cont..)
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Fig 3 [10] Fig 4 [11] Fig 5 [12]
Point to Point Topology Several host connected by Switch Several network connected by Router

(cont..)
Networks provides Box centric approach.[8]
 The control plane and the data plane are tightly coupled inside a networking devices.[3]
 CP that decides how handle network traffic.[4]
 DP that forwards traffic according to decisions made by the control plane.[4]
8/23/2018 5
Fig 6 [15]

(cont..)
 Whole structure is highly decentralized.[3]
 Network operator need to configure each individual network device separately using low-level
and often vendor-specific commands.[3]
 Main Problem in Conventional networking is
 Administrator configuring numerous individual devices.[4]
 As your network scales, it becomes more and more inflexible as more and more devices have to be
configured for every change.[4]
 The Switches does not have programmatically.
 Rules can not be changed dynamically as per our wish.
8/23/2018 6

What is SDN(Software Defined
Networking)?
 SDN introduces a new paradigm to overcome the limitation of the conventional network.
 SDN is a new network architecture that comprised different network technologies to build a
flexible, scalable, agile and easy manageable networks.[13]
 Every Vendor have different definition.[7]
 According to CISCO, SDN is Network Programmatically and Network Automation.[7]
 According to ONF, SDN is physical separation of the network control plane from the
forwarding plane and control plane controls several devices.[7]
 Centralized SDN controller directs the switches to deliver network services.[6]
8/23/2018 7

What is SDN?(cont..)
 A network engineer or administrator can shape traffic from a centralized control console
without having to touch individual switches in the network.[6]
 SDN is broadly classify into three layers that Application Layer, Control Layer, Infrastructure
Layer
8/23/2018 8

Difference between Conventional
Networking and SDN
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SDN Architecture
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Fig 7 [16]

SDN Architecture(cont..)
 SDN architecture Terminologies [3]
 Forwarding Devices
 Data Plane
 Southbound Interface
 Control Plane
 Northbound Interface
 Application Plane
8/23/2018 13

8/23/2018 14
Fig 6 [13] Fig 7 [13]
Forwarding Devices & Data Plane Control Plane

8/23/2018 15
Fig 8 [13] Fig 9[13]
Northbound Interface Southbound Interface

Finding/Observations
No. Type Title Publication
and Year
Description Observations
1 ONS –
Networking
conference
ONS
2015:Keynot
e – Amin
Vahdat
2015 Google Invention in
Software(GFS,
MapReduce, etc.)
Google Invention in
networking(B4, Jupiter,
etc.)
Know how Google move to
SDN
Issues in Data center
2. Review
Paper
Software
Defined
Networking:
A
comprehensi
ve Survey
2014 Differentiate
Conventional networking
and SDN, SDN
Architecture, Network
Application, On Going
Research Issues.
It is Hard to manage and
configure each individual device
in traditional networking.
CP and DP is separate in SDN.
In several issues Scalability is
most recent issue in data center.
8/23/2018 19

Finding/Observations(cont..)
8/23/2018 20
No. Type Title Publicatio
n and Year
3 qmonnet.g
ithub.io
Web
source
An
introduction
to SDN
2016 Limitation of
Conventional
networking,
working of and
SDN
New architecture model provides a way to
programmatically configure the switches
at runtime, and to manage the network
resources in a more efficient way.
simple switches are no longer able to meet
the industry’s requirements.
4. Udemy Introduction
to SDN and
OpenFlow
------------
What is SDN?
OpenFlow?
As per requirement different vendor have
different SDN definition.
SDN.
OpenFlow is not SDN It is popular SB
Protocol.

Finding/Observations(cont..)
No. Type Title Publication
and Year
5. Udemy What is NBI
And SBI?
--------------
Different company or
vendor or
organization have
various SDN
architecture because
they follow different
NBI-API and SBI-
Protocols.
NBI interface between the
applications and controllers.
Most popular interface of NBI
is REST.
SBI interface between
Infrastructure layer and
Control layer. Most Popular
protocol of SBI is OpenFlow.
6. Udemy SDN and
OpenFlow
Part 1: GNS3
Switching
---------------
Install GNS3 and
Practical for SDN.
How to install GNS3 and
GNS3 VM and import
different appliance for router
and Switches. Continue..
8/23/2018 21

SDN Network Applications
 Traffic Engineering
 Mobility & Wireless
 Load Balancing
 Routing Protocols
 Measurement & Monitoring
 Security & Dependability
 Data Center Networking
8/23/2018 22

Issues in Data Center
 Data center is collection of row by row switches and row by row server.[8]
 Day by day Industries are Moving to the Cloud and data is growing and that’s why need of data
center.[8]
In Previous days, the issue in data center all things done manually like adding new feature,
configure, maintain etc.
8/23/2018 23
Fig 10 [14]

Issues in Data Center(cont..)
 Another issue is find unpredictable traffic patterns in data center.[9]
 Traffic patterns have high demands for particular resources that could not meet the existing
network infrastructure.[9]
 So, they had two choices[9]
 Either scale the network infrastructure to meet peaks, which is very expensive.
 Or Build your network in such a way that it can configure itself automatically to meet appropriate
demands.
 Data Center that you can planned it, build it and configured it in a central way.[8]
 There are also software-defined applications, which perform tasks in a software-defined
networking architecture and can create flexibility, efficiency and resiliency for data centers.[1]
8/23/2018 24

Issues in SDN
 Switch Design
 Controller platforms
 High availability
 Modularity and Flexibility
 Interoperability and portability
 Resilience
 Scalability
 Performance Evaluation
 Security and Dependability
 Migration and Hybrid deployments
8/23/2018 25

Tentative Problem Statement
 Reduce overhead on the control plane in the concept of scalability.
 Load balancing.
 Increase scalability by using distributed and multi core architecture.
 Improve controller performance in terms of scalability.
 Improve Southbound APIs and Controller Placement to achieve high availability.
8/23/2018 26

Conclusion
 Conventional networks are complex and hard to manage. CP and DP are vertically integrated and
static.
 SDN created and opportunity for solving the problems.
 Some of the key ideas of SDN are the introduction of dynamic programmability in forwarding
devices through the decoupling of the control and data plane.
8/23/2018 27

Future work Plan
 Finding actual problem definition.
 Exploring tools more like mininet, wireshark, Cisco Packet tracer, GNS3.
 Finding the Research gap.
 Make Literature survey.
 Implement existing technology or topology and find problem in it.
8/23/2018 28

References
[1] https://searchdatacenter.techtarget.com/ehandbook/A-closer-look-at-SDN-vs-traditional-
networking
[2] http://www.rfwireless-world.com/Terminology/traditional-networking-vs-software-defined-
networking.html
[3] https://ieeexplore.ieee.org/abstract/document/6994333
[4] https://www.sunsetlearning.com/training-resources/sli-blogs/software-defined-networking-
sdn-work
[5] https://www.opennetworking.org/sdn-definition
[6] https://searchsdn.techtarget.com/definition/software-defined-networking-SDN
[7] https://www.udemy.com/sdn-openflow-nfv-introduction/learn/v4/t/lecture/7222140?start=0
8/23/2018 29

References(cont..)
[8] ONS 2015: Wednesday Keynote - Amin Vahdat
https://www.youtube.com/watch?v=FaAZAII2x0w
[9] https://www.youtube.com/watch?v=BNFLaY3YhxY
[10] https://www.omega.com/literature/transactions/volume2/digitalsignal3.html
[11] https://sameer9247.wordpress.com/2018/01/12/wired-network-topology
[12] http://www.iusmentis.com/technology/tcpip/networks
[13] https://ipcisco.com/sdn-architecture-components
[14] https://www.datacenterknowledge.com/archives/2015/04/08/etsy-owes-data-center-
efficiency-to-facebooks-open-source-vm
[15] https://www.researchgate.net/figure/Traditional-Network-versus-SDN_fig1_319876305
[16] https://qmonnet.github.io/whirl-offload/2016/07/08/introduction-to-sdn
8/23/2018 30

Acronyms
 SDN : Software Defined Networking
 CP : Control Plane
 DP : Data Plane
 SBI : Southbound Interface
 NBI : Northbound Interface
 FDs : Forwarding Devices
 SD-WAN : Software Defined Wide Area Networking
 ONOS : Open Network Operating System
 ASIC : Application Specific Integrated Circuit
 API : Application Program Interface
8/23/2018 31

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