Building a virtual private network

This document is a fairly detailed description of the main aspects of the implementation of MPLS networks operators to provide Virtual Private Network services and derivative services. The paper discusses in detail issues related to the rationale for the choice of technology MPLS-VPN; are examples of solutions services for the construction of intranet and extranet, the issues related to the provision of external services, the Internet and network management aspects related to quality of service and traffic-engineering are the different options for access and the organization of routing. The document is aimed at engineers and technicians using or planning to use this technology in their network, network designers and consultants, whose area of \u200b\u200binterest extends to the technology MPLS. Sections 1 and 2 of the document describing the general trends in the telecommunications community, providing an overview of technology solutions and services, and a general description of the purpose of the decision may be of interest to managers and consultants who are responsible for business planning company operators.