Inter-domain MPLS services is such a vast topic that it could fill a book on its own. This chapter focuses on an inter-domain type (Inter-AS) and a service type (IP VPN). Although this is just one piece of the entire picture, it is enough to get an idea of the challenges and techniques that are typically seen in inter-domain MPLS services.
But, before diving into Inter-AS IP VPN, let’s get an overview of what the different inter-domain MPLS services are and how they can be classified.
Given two domains, D1 and D2, there are two ways to design the border:
Two ASs are connected through a link with one device at each end, whereas two areas are connected through a network device.
In classic networking, an AS and ...