997. [Online]. Available: https://tools.ietf.org/html/rfc2205 14. C. Filsfils and K. Michielsen, Introduction to Segment Routing and Its Concepts, [Online]. Available: http://www.segment-routing.net/tutorials 15. J. Vasseur and J. Le Roux, RFC 5440, Path Computation Element (PCE) Communications Protocol, March 2009. [Online]. Available: https://tools.ietf.org/html/rfc5440 16. H. Gredler, J. Medved, S. Previdi, A. Farrel and S. Ray, RFC 7752, North-Bound Distribution of Link- State and Traffic Engineering (TE) Information Using BGP, March 2016. [Online]. Available: https:// tools.ietf.org/html/rfc7752 Service Platforms Paul Greendyk, Anisa Parikh, and Satyendra Tripathi CONTENTS 14.1 Introduction 14.2 New Service Design Solutions with SDN/NFV 14.2.1 Virtual Service Framework 14.2.1.1 Software-Defined Service Framework 14.2.1.2 Virtual Service Control Loop Framework 14.2.1.3 Deployment Considerations 14.3 Pivot to SDN/NFV: Methodology, Process, Skills 14.3.1 Service Creation 14.3.2 Service Design Methodology 14.3.3 Testing Methodology 14.4 Current and Virtualized Service Platform Use Cases 14.4.1 IMS Service Platform 14.4.1.1 Current Implementation 14.4.1.2 SDN/NFV Implementation 14.4.1.3 Key Design Principles Applied 14.4.1.4 Georesiliency, Topology, and Scalability 14.4.1.5 Performance 14.4.1.6 Hybrid Architecture (VNFs and PNFs) 14.4.2 Evolved Packet Core 14.4.2.1 Advantages of Virtualizing EPC 14.4.2.2 Virtual Logical Platform Architecture and Design 14.4.2.3 Network Design 14.4.2.4 Capacity and Scaling Design 14.4.2.5 Integration with ONAP 14.4.3 BVoIP Services 14.5 Topics for Future Study References This chapter discusses service platforms that support end-to-end service implementations in an IP network. Examples of these platforms include the IMS-IP Multimedia Subsystem-based plat- forms [1] that support Voice over LTE (VoLTE), Rich Communication Services (RCS) including video and messaging, consumer Voice over IP (VoIP) services, and Business VoIP (BVoIP) service platforms, which support business customers,