Multi-domain Service Function Chaining with ALTO

Document Type Expired Internet-Draft (individual)
Authors Danny Perez  , Qiao Xiang  , Christian Rothenberg  , Y. Yang 
Last updated 2021-01-14 (latest revision 2020-07-13)
Replaces draft-lachos-multi-domain-sfc-alto
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The delivery of network services often require service functions and their specific order, called a service function chain (SFC). A SFC request is usually composed by distributed resources which are expected to available across multiple domains with different technology and/or administration. This document describes different standardization activities and research projects addressing the challenges posed by SFC across multiple domains (specifically, multiple administrative domains). In addition, this document presents an initial approach to realize inter-domain service chains leveraging the Application Layer Traffic Optimization (ALTO) protocol. Finally, another important concern of this document is to initiate a discussion (ALTO, SFC as well as other WGs) regarding if, how, and under what conditions ALTO can be useful to improve the multi-domain SFC process.


Danny Perez (
Qiao Xiang (
Christian Rothenberg (
Y. Yang (

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