Virtualization of network services is a necessary and evolutionary step in modern networking. We virtualize servers, applications and data centres, but the network services on a larger scale are still waiting for virtualization. There are a number of technologies available to us today to enable virtualization of network functions. Just as in data centres it is possible to separate applications from the specific hardware, it is equally possibly in data communications to eliminate plenty of specialized hardware and maintain the same functionality within virtual instances.

Separation of network functions from hardware allows simplified management and faster deployment of the network based on immediate needs. Ideally, we would need a communications infrastructure which is open and easily interfaced, and in this way NFV acts as a bridge to SDN. The openness of SDN makes it an ideal platform for the implementation of virtual network services.

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Distributed Network Functions D-NFV

In connection with SDN, there is talk about applications that open network architecture brings. There is a new application interface that provides access to new applications without regional restrictions, which virtualizes networking functions. It is here that the concept of NFV (Network Virtualization Functions) becomes known. This function is essentially independent of SDN, but NFV alone can maximize the openness of the SDN interface. We need to get applications -network features- to the customer proactively, according to immediate needs. Most of these virtualised functions stay within data centres and are swiftly and efficiently allocated to customers. However, there are features that we would like to virtualize, but they would need to be closer to the customers. We need the customers to have open platform, which would allow us to dynamically add network functionality as needed; we need distributed NFV.

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IP VPN virtualzation and Carrier Ethernet access

IP VPN are for many years the only available and economical solution for connecting corporate networks. IP protocol is the unifying element in a private networks, networks of individual operators or using the public Internet. The main reason for massive expansion of private networks using IP VPN is extending IP and mainly using the public Internet. IP VPN technology allows us to connect to our private network wherever there is an Internet connection.

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