A Framework for Constructing Service Function Chaining Systems Based on Segment Routing

The information below is for an old version of the document
Document Type Expired Internet-Draft (individual)
Authors Cheng Li  , Ahmed El Sawaf  , Ruizhao Hu  , Zhenbin Li 
Last updated 2020-05-07 (latest revision 2019-11-04)
Stream (None)
Expired & archived
pdf htmlized bibtex
Additional Resources
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Segment Routing (SR) allows for a flexible definition of end-to-end paths by encoding paths as sequences of topological sub-paths, called "segments". Segment routing architecture can be implemented over an MPLS data plane as well as an IPv6 data plane. Service Function Chaining (SFC) provides support for the creation of composite services that consist of an ordered set of Service Functions (SF) that are to be applied to packets and/or frames selected as a result of classification. SFC can be implemented based on several technologies, such as Network Service Header (NSH) and SR. This document describes a framework for constructing SFC based on Segment Routing. The document reviews the control plane solutions for route distribution of service function instance and service function path, and steering packets into a service function chain.


Cheng Li (chengli13@huawei.com)
Ahmed El Sawaf (aelsawaf.c@stc.com.sa)
Ruizhao Hu (huruizhao@huawei.com)
Zhenbin Li (lizhenbin@huawei.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)