Differentiated Service Function Chaining Framework

IP networks rely more and more on the combination of advanced functions (besides the basic routing and forwarding functions) for the delivery of added value services. This document defines a framework to enforce Service Function Chaining (SFC) with minimum requirements on the underlying network. The proposed framework allows for Differentiated Forwarding (DiffForward): packets are initially classified and marked at the entry point of an SFC-enabled domain, and are then forwarded on a per SF Map Index basis.