I-D ACTION:draft-ietf-policy-framework-pfdl-00.txt

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This draft is a work item of the Policy Framework Working Group of the IETF.

	Title		: Policy Framework Definition Language
	Author(s)	: J. Strassner, S. Schleimer
	Filename	: draft-ietf-policy-framework-pfdl-00.txt
	Pages		: 18
	Date		: 23-Nov-98
	
Recently, the IETF has developed protocols that classify packets in
order to treat certain classes or flows of packets in a particular
way compared to other classes or flows of packets. The successful
wide-scale deployment of these protocols depends on the ability to
administer and distribute consistent policy information to different
types of network devices as well as hosts and servers that participate
in policy decision making, administration, distribution and control.
There is a clear need to develop a scalable framework for policy
administration and distribution that will enable interoperability
among multiple devices and device types that must work together to
achieve a consistent implementation of policy.
This document defines a language, called the Policy Framework
Definition Language (PFDL), that maps requirements for services to be
provided by the network as defined in a business specification (e.g.,
an SLA) to a common vendor- and device-independent intermediate form.
This enables policy information and specifications to be shared among
the heterogeneous components that comprise the policy framework, and
allows multiple vendors to use multiple devices to implement that
framework. The PFDL is the common 'currency' that is exchanged between
these heterogeneous components to enable them all to perform their
function in providing, securing, distributing, and administering
policy. The PFDL becomes the way to ensure that multiple vendors
interpret the policy the same way while enabling vendors to provide
value-added services.


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