Establishing Private Network Over Public Infrastructure Using Multi Protocol Label Switching Technology over Ipv6

and ATM networks have many disadvantages in the management operation of large networks such as cost, security, scalability and flexibility. To solve this, an MPLS-based VPN networking is introduced that can work with existing deployed backbones and allow organizations to interconnect the dispersed sites and remote workers through secure links by using public internet. In this paper we tried to provide a better understanding of services provider large networks management operation; through focusing on the MPLS VPN technology. To get familiar with the MPLS VPN networks behaviour, we chose the interaction between routing protocols as a case study to evaluate the MPLS VPN networks performance. This work mainly focus on studying the effect of the interior gateway routing protocols in the MPLS VPN networks. We chose famous protocols for investigation (OSPF) and we proposed two different scenarios and simulated them by using GNS3,VPCS,,WIRESHARK, then a deep analyses of the network performance was provided. Keywords--VPN,MPLSVPN,OSPFv3,RIPn