[Dcpel] Purpose of a diffserv control plane

"Pulliam, Jeffrey S" <jeffrey.s.pulliam@lmco.com> Tue, 08 November 2005 11:25 UTC

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Date: Tue, 08 Nov 2005 03:25:24 -0800
From: "Pulliam, Jeffrey S" <jeffrey.s.pulliam@lmco.com>
Subject: [Dcpel] Purpose of a diffserv control plane
To: Kathleen Nichols <nichols@pollere.com>, dcpel@ietf.org
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A couple of things - 

- For those interested in follow up, I want to repeat the offer of lunch at the IETF on Tuesday November 8 at 11:30 - in the MacKenzie room.  The room is on the first floor near the meeting registration tables.   

- In hopes of starting a discussion, I would like to try out the following as a starting position for discussion:

The purpose of a diffserv control plane is to provide automated control of the diffserv domain, governed and constrained by policy.  Control functions configure the diffserv domain to deliver services in response to requests.  Requests to the control function are made by users, network operations, and  network management.  The control plane contains necessary  rules and logic to respond to the requests automatically, with resulting actions including actions to configure the network to accept (or reject) the request, and actions to respond to the requestor with status of the request.

Request can originate internal to the diffserv domain, or originate from other network domains. Actions in response to the requests are either actions affecting the internal diffserv domains, or are actions that cross domain boundaries (in the form of requests?).  A quick and dirty simple picture showing the contexts (lots of room for improvement).
                        
Requestors     Control         Actions

            ***********
User<------>*         *<----->Network Configuration
            * Control *
Net Op<---->*  Plane  *
            *         *<----->Response to Requestor
Net mgt<--->***********

What is the role, functions, and constraints of signaling within the diffserv domain?  I would like to revise (or replace) the above to accurately reflect the role of signaling within a diffserv domain.  

Suggestions?

Jeff Pulliam



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