RFC 2753 (rfc2753) - Page 1 of 20

A Framework for Policy-based Admission Control

Network Working Group                                         R. Yavatkar
Request for Comments: 2753                                          Intel
Category: Informational                                     D. Pendarakis
                                                                      IBM
                                                                R. Guerin
                                                       U. Of Pennsylvania
                                                             January 2000


             A Framework for Policy-based Admission Control


Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2000).  All Rights Reserved.

1. Introduction

   The IETF working groups such as Integrated Services (called "int-
   serv") and RSVP [1] have developed extensions to the IP architecture
   and the best-effort service model so that applications or end users
   can request specific quality (or levels) of service from an
   internetwork in addition to the current IP best-effort service.
   Recent efforts in the Differentiated Services Working Group are also
   directed at the definition of mechanisms that support aggregate QoS
   services. The int-serv model for these new services requires explicit
   signaling of the QoS (Quality of Service) requirements from the end
   points and provision of admission and traffic control at Integrated
   Services routers. The proposed standards for RSVP [RFC 2205] and
   Integrated Services [RFC 2211, RFC 2212] are examples of a new
   reservation setup protocol and new service definitions respectively.
   Under the int-serv model, certain data flows receive preferential
   treatment over other flows; the admission control component only
   takes into account the requester's resource reservation request and
   available capacity to determine whether or not to accept a QoS
   request.  However, the int-serv mechanisms do not include an
   important aspect of admission control: network managers and service
   providers must be able to monitor, control, and enforce use of
   network resources and services based on policies derived from
   criteria such as the identity of users and applications,
   traffic/bandwidth requirements, security considerations, and time-




Yavatkar, et al.             Informational