Re: [DMM] I-D Action: draft-ietf-dmm-fpc-cpdp-05.txt

[Charlie Perkins <[e-mail]>]

Hello folks,

I am in the process of reviewing the FPC document.  It is an important 
document and will be foundational for subsequent work in [dmm].  I would 
like to suggest a change in terminology.  I think the way "Port" is 
currently defined in the document is very confusing, because it is not 
very intuitively related to the traditional uses of "port" as in TCP, or 
in switches.

As I understand it, "Policy" lives on the control plane side of the 
interface, and "Port" is intended to denote a concept that is important 
on the data plane side of the interface.  "Flow" is another word that is 
closely tied to the data plane, and it seems to me that as currently 
defined in the document a "Port" is a collection of flows that 
correspond to a specific Policy or Policy Group.

So, I would like to propose that the word "Port" should be replaced by 
the term "Flow Group".  Another alternative would be "Flow Policy 
Group", which could then be abbreviated FPG. However, the latter has the 
perhaps undesirable effect of tying the word "Policy" to a data-plane 
concept.

Thanks for any comments on this proposal to modify the terminology.

I think it is important to make the terminology as unambiguous and 
intuitive as we possibly can, especially because the document is 
necessarily written at a high level of abstraction.

Regards,
Charlie P.


On 10/31/2016 9:54 AM, [e-mail] wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Distributed Mobility Management of the IETF.
>
>          Title           : Protocol for Forwarding Policy Configuration (FPC) in DMM
>          Authors         : Satoru Matsushima
>                            Lyle Bertz
>                            Marco Liebsch
>                            Sri Gundavelli
>                            Danny Moses
> 	Filename        : draft-ietf-dmm-fpc-cpdp-05.txt
> 	Pages           : 153
> 	Date            : 2016-10-31
>
> Abstract:
>     This document describes the solution of data-plane separation from
>     control-plane which enables a flexible mobility management system
>     using agent and client functions.  To configure data-plane nodes and
>     functions, the data-plane is abstracted by an agent interface to the
>     client.  The data-plane abstraction model is extensible in order to
>     support many different type of mobility management systems and data-
>     plane functions.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-dmm-fpc-cpdp/
>
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-ietf-dmm-fpc-cpdp-05
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-dmm-fpc-cpdp-05
>
>
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
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