INTRODUCTIONVirtualization 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.

NEED OF VITUALIZATIONWhen 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.

NETWORK VIRTUALIZATIONNetwork 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.

NV ARCHITECTURE

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.

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.

“Nicira” delivers

the first network

virtualization

platform which

enables the n/w for

cloud.

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.

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.

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)

Provide secure address space isolation between

virtual networks, the physical network and the

control plane

Take full advantage of physical network capacity

ATTRIBUTES OF NVMulti-tenant segmentation

Workload portability

Multi-site Asset Utilization

Network Abstraction from Physical to Virtual

Virtual Machine Aware

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.

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.

SECURITY PROVIDED BY NV

Isolation and Multi-Tenancy

Segmentation

Advanced security service Insertion , Chaining and

Steering

Consistent security models across Physical and

Virtual Infrastructure

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.

BENIFITSReduce 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

LIMITATIONS

Experience required for implementing or operating

virtualization

Power computers can only create virtual

environment.

FUTURE IMPACTThe 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.

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.

QUESTIONS?

THANK

YOU

simulation of network through virtualization technique

Technology