Subject: RE: [Diffserv] The relation between PDB

From: Rares SERBAN <[email-masked]>
Date: Mon, 02 Apr 2001 19:07:25 +0300

Larry,

>In "Service Level Specfication and Usage Framework", by Yves T' Jones et.
>al. it states that "The specification of SLSs is out of the scope of the
>DiffServ WG. The definition of PDB's could however have an impact on the SLS
>definition.... It is important to keep in mind that in general the PDB
>definitions and their attributes are not expected to be directly visible to
>customers at the SLS level".

Service Level Specifications are defined by a Service Level Agreement between User/ISP or ISP/ISP. 

PDB defines multiple objects. With these objects we can built parameters for SLS.(instantiate)

The problem is how to establish a comon language between User/ISP, ISP/ISP ("laws")for setting parameters?
How many parameters needs one ISP and hom many another? etc.

PDB "language" describes/defines(may be managed) the objects (inside).

>
>This distinction is somewhat perplexing to me since it is not clear why the
>PDB can not be itself be used instead of the SLS formalism specified in
>those references. Can somewhat help me out with the formalism in how the two
>transport domain level specifications are intended to coexist.

Here, I can give some references because some people are working at this subject.

http://www-sop.inria.fr/rodeo/Rares.Serban/Research.html

May be is not so clear. May be you will find some articles, presentations.

Thank you,

R.

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