Off-Path Signaling Protocol for Service Function Chaining

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Last updated 2017-06-04 (latest revision 2016-12-01)
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This document illustrates a reference protocol able to discover deployed instances of Service Functions (SFs), which can be located also off-path with respect to the IP datapath between flow source and flow destination. It is an application protocol organized in two layers: signaling transport, which deal lower layer signaling transport, and signaling application, which directly interfaces with the intended SF. Discovery of SFs is a primary step to for implementing Service Function Chaining (SFC).


Mauro Femminella (
Gianluca Reali (
Dario Valocchi (

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