This document is the Document Shepherd Write-Up
for draft-irtf-sdnrg-layer-terminology-00 as required by
(1). The SDNRG is requesting that this document be published
as an Informational RFC.
(2). Document Approval Write-Up
Software-Defined Networking (SDN) can be defined as a new
approach for network programmability. Network
programmability in this context refers to the capacity to
initialize, control, change, and manage network behavior
dynamically via open interfaces as opposed to relying on
closed-box solutions and their associated proprietary
interfaces. SDN emphasizes the role of software in
running networks through the introduction of an
abstraction for the data forwarding plane and, by doing
so, separates it from the control plane. This separation
allows faster innovation cycles at both planes as
experience has already shown. However, there is
increasing confusion as to what exactly SDN is, what is
the layer structure in an SDN architecture and how do
layers interface with each other. This document
addresses these questions and provides a concise
reference for SDNRG and the wider SDN community based on
relevant peer-reviewed literature, the RFC series, and
relevant documents by other standards organizations.
Working Group Summary:
It is worth noting that while there was some minor
dissonance, there was general consensus around this
document. In addition, being an IRTF document the
requirements for consensus are looser.
(i). No protocol specified, hence no implementations
(ii). Similarily, no protocol specified so nothing for
vendors to implement.
(iii). Spencer Dawkings did a thorough (IRSG) review. In
addition, there was lively discussion/review from
(iv). No MIB Doctor, Media Type or other expert review
Document Shepherd: David Meyer
Responsible AD: Lars Eggert
(3) Document review by Shepherd
Having been one of the authors, I have been intimately
involved in the development of the document. The document
is ready for publication.
(4). No concerns about the depth or breath of reviews.
(5). Since the document is an informational document outlining
an approach to describing SDN terminology, no additional
wider reviews are required.
(6). No specific concerns with the document.
(7). The document is in full conformance with the provisions
of BCP 78 and BCP 79.
(8). No IPR disclosures required as no protocol specified.
(9). The document has good consensus (noting here again that
the requirementn for consensus in the IRTF is somewhat
less formal than in the IETF). The document includes the
The first version of this document was published in
July 2013. Subsequently, updated versions were
presented during the SDNRG meetings at IETF 88, IETF
89, and IETF 90 and have been reviewed, commented, and
discussed extensively for more than one year by the
vast majority of SDNRG members, which certainly exceeds
100 individuals. It is the consensus of SDNRG that
this document should be published in the IRTF Stream
RFC Series [RFC5743].
(10). No threatened appeals. I will say that the ONF folks
wanted to substitue their document wholesale for this
one; to that end we included the following citation:
[ONFArch] Open Networking Foundation, "SDN Architecture,
Issue 1", June 2014,
(11). Document passes id-nits and has modern/correct
(12). Since this is an Informational document and doesn't
specify a protocol, MIB, or media type, item (12) does
(13). All references have been identified as Informative
(14). Item (14) does not apply; no normative references.
(15). See (14).
(16). Publication of this document will not change the status
of any existing RFC.
(17). The document makes no requests to the IANA.
(18). See (17).
(19). No MIBs, XML, BNF (or the like) specified, so (19) does