http://www.rfc-editor.org/rfc/rfc7665.txt
RFC 7665: Service Function Chaining (SFC) Architecture, J. Halpern, C. Pignataro2015-10-01T23:00:00-00:00This document describes an architecture for the specification, creation, and ongoing maintenance of Service Function Chains (SFCs) in a network. It includes architectural concepts, principles, and components used in the construction of composite services through deployment of SFCs, with a focus on those to be standardized in the IETF. This document does not propose solutions, protocols, or extensions to existing protocols.