Network virtualization involves creating virtual versions of networking hardware and resources like switches and routers through software. This allows networking services and resources to be more easily deployed and managed independently of physical infrastructure. By creating logical abstractions of physical networks, virtualization improves flexibility, scalability, and mobility of virtual machines. While gaining benefits like reduced costs and improved disaster recovery, network virtualization also faces challenges around required expertise, limited performance of virtualized resources, and difficulties virtualizing wireless networks.

2. CONTENT
Introduction
Need of Virtualization
Network Virtualization
Working
A New Proposal
Benefits
Limitations
Future impact
Conclusion

3. INTRODUCTION
 Virtualization refers to the act creating the virtual
version rather than the actual for simulating a
hardware platform such as server, storage or
network resources in software.
 The physical devices are simply responsible for the
forwarding of packets, while the virtual network
provides an intelligent abstraction that makes it easy
to deploy and manage network services and
underlying network resources.

4. NEED OF VITUALIZATION
When virtualization technique is applied to the
network, it creates a logical software-based view of
the hardware and software networking resources
such as switches, routers, etc.
 It provides solution to the problem incurred in
moving the virtual machine across different
domains.
 The idea is to apply virtualization technique on
networking to provide parallel data transmission to
achieve high speed network.

5. NETWORK VIRTUALIZATION
 Network Virtualization literally tries to create a
logical segment across the network by dividing the
network logically at flow level. It is similar to
partitioning the hard drive.
 It is accomplished by using a variety of hardware
and software and combining network.
 Network Virtualization is an overlay and it can be
said to be act like a tunnel. Instead of physically
connecting two domains in a network, NV creates a
tunnel through the existing network to connect two
domains. This runs on high performance x86
architectures.

6. NV ARCHITECTURE

7. WHY IT IS USED
 This paves a new way to virtualize the infrastructure
and make changes on top of the existing
infrastructures.
 The main goal of this concept is to allow people to
move VMs independently of their existing
infrastructure and no need of reconfiguration of
network.
 The intended result of Network Virtualization is
improved network productivity and efficiency.

8.  Physical network-while excellent at forwarding
packets-is an inflexible, complex and costly barrier
to realize the full agility required for parallel data
transmission.
 Physical network bounds to network resources and
topology. The solution to this barrier is to virtualize
the network which decouples the network services
from underlying physical n/w hardware or
resources.
 Decoupling virtual networks from the physical
hardware allows you to scale the pool of network
capacity without affecting the virtual networks
operating above it.

9. “Nicira” delivers
the first network
virtualization
platform which
enables the n/w for
cloud.

10. WORKING
 The idea behind virtual network software is to
introduce an abstraction which will decouple traffic
in physical network elements and also it creates
virtual components such as virtual network adapters
and virtual switches.
 NV requires the VLAN software on each virtualized
server as well as within the switches. Those switches
are referred as intelligent switches.
 Virtual network software provided by Citrix and
Vyatta offers a platform to create a complete
virtualized network stack for an organization.

11. When two VMs on the same server exchange data, no
traffic goes out onto the external network.
 The workloads simply exchange data between
locations in the server’s memory.
 This offers extremely fast performance for data
transferred between the workloads.
 In addition, that data does not need to go out onto the
external network, so bandwidth is freed for other
servers and tasks out on the network.

12. SEVEN KEY FEATURES ANY NETWORK VIRTUALIZATION
DELIVER
 Completely decouple virtual networks from the
underlying network hardware
 Faithfully reproduce physical network services in
the logical space
 Complement any server hypervisor platform, and
any application on any virtual or physical machine
 Allow programmatic provisioning and virtual
network control
 Enable cloud scale (>10K virtual networks)

13.  Provide secure address space isolation between
virtual networks, the physical network and the
control plane
 Take full advantage of physical network capacity
ATTRIBUTES OF NV
 Multi-tenant segmentation
Workload portability
Multi-site Asset Utilization
 Network Abstraction from Physical to Virtual
 Virtual Machine Aware

14. NETWORK SECURITY THROUGH NV
 From server
consolidation to the
cloud, virtualization is
now the dominant
computing platform
worldwide. Beyond
expanding computing
capabilities, increase
network virtualization
can also be considered
a method to increase
network security.

15.  The basic idea is to use NV to restrict n/w traffic
within physical network.
 Nodes which are configured as a part of given virtual
network can send or receive data on that virtual
networks, the traffic tends to be more secure .
 Hence the unauthorized nodes are not allowed to
access the sensitive data.

16. SECURITY PROVIDED BY NV
 Isolation and Multi-Tenancy
 Segmentation
 Advanced security service Insertion , Chaining and
Steering
 Consistent security models across Physical and
Virtual Infrastructure

18.  The idea of virtualizing wireless network is gaining
attention as it has the potential to improve spectrum
utilization and perhaps create new services.
And also data security is not up to the level of getting
in wired network.
Interference is more in wireless technologies like
Wi-Fi and there is a possibility of random signal
loss.
But the speed of transmission is more and physical
link is not required when compared to wired
network.

20. BENIFITS
 Reduce hardware cost
 Server power consumption can be reduced
 Recoverability: quick recovery from hardware
failure
 Disaster recovery
 Installation speed and simplicity
 Increased mobility and collaboration
 More Scalability

21. LIMITATIONS
 Experience required for implementing or operating
virtualization
 Power computers can only create virtual
environment.
FUTURE IMPACT
 The idea proposed is about virtualizing wireless
network since it has more scope in future.
 The challenge we are facing while virtualizing the
wireless network is assigning the physical resources
to virtual networks in an efficient manner.

22. CONCLUSION
 NV also helps in preventing destruction of data
while sending through virtual links.
 Any number of virtual links can be created which
helps in sending more packets than sending it over
the single physical network
While the journey toward a highly virtualized
infrastructure will be long, and at times arduous,
the result will bring the enterprise to new levels of
performance, reliability, agility, and efficiency.

23. QUESTIONS?

24. THANK
YOU