Multi Protocol Label Switching

Carrier-Supporting-Carrier VPN Architectures: MPLS VPNs are one of the most widely deployed VPN architectures in the global Internet. However, a major pre-requisite for MPLS VPN is the support for MPLS in all the provider core routers. The situation becomes complicated when service providers themselves use a backbone carrier to bring connectivity to their networks since the ability of the backbone to support MPLS connectivity would be crucial to the service provider. MPLS-over-GRE tunnels is a new concept that has proposed to bring MPLS connectivity between networks that are connected by an IP-only network. The aim of the current work in this research area is to evaluate the performance of MPLS Carrier Supporting Carrier configuration with and without MPLS-over-GRE tunnels.

Mobile MoGRE VPN: While the usage of IPSec based VPNs for the construction and maintenance of a mobile VPN is feasible, issues related to its scalability in terms of required resources and QoS provisioning limit its practical deployment. The research work in this area explores the usage of a MPLS over GRE (MoGRE) based VPN architecture to construct a mobile VPN that would provide scalable, yet secure connections between the mobile networks and their corresponding home networks.