Multiprotocol label switching adds to the capabilities of IP networks in several ways. Despite new capabilities, MPLS technology has much in common with ordinary IP networks. In turn, the design process for MPLS networks has much in common with the design of any IP network. This article examines MPLS and IP technology with particular emphasis on what is common between them. The common design steps of MPLS networks and other IP networks are outlined briefly, and those issues specific to MPLS networks are covered in more detail. This article emphasizes MPLS point of presence design, routing design issues for MPLS, and provisioning of sufficient label space.