RSVP Extensions for Policy Control
RFC 2750

Network Working Group                                           S. Herzog
Request for Comments: 2750                                      IPHighway
Updates: 2205                                                January 2000
Category: Standards Track

                   RSVP Extensions for Policy Control

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

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

Abstract

   This memo presents a set of extensions for supporting generic policy
   based admission control in RSVP. It should be perceived as an
   extension to the RSVP functional specifications [RSVP]

   These extensions include the standard format of POLICY_DATA objects,
   and a description of RSVP's handling of policy events.

   This document does not advocate particular policy control mechanisms;
   however, a Router/Server Policy Protocol description for these
   extensions can be found in [RAP, COPS, COPS-RSVP].

Herzog                      Standards Track                     [Page 1]
RFC 2750           RSVP Extensions for Policy Control       January 2000

Table of Contents

   1 Introduction.......................................................2
   2 A Simple Scenario..................................................3
   3 Policy Data Objects................................................3
   3.1  Base Format.....................................................4
   3.2  Options.........................................................4
   3.3  Policy Elements.................................................7
   3.4  Purging Policy State............................................7
   4 Processing Rules...................................................8
   4.1  Basic Signaling.................................................8
   4.2  Default Handling for PIN nodes..................................8
   4.3  Error Signaling.................................................9
   5 IANA Considerations................................................9
   6 Security Considerations............................................9
   7 References........................................................10
   8 Acknowledgments...................................................10
   9 Author Information................................................10
   Appendix A: Policy Error Codes......................................11
   Appendix B: INTEGRITY computation for POLICY_DATA objects...........12
   Full Copyright Statement ...........................................13

1  Introduction

   RSVP, by definition, discriminates between users, by providing some
   users with better service at the expense of others. Therefore, it is
   reasonable to expect that RSVP be accompanied by mechanisms for
   controlling and enforcing access and usage policies. Version 1 of the
   RSVP Functional Specifications [RSVP] left a placeholder for policy
   support in the form of POLICY_DATA object.

   The current RSVP Functional Specification describes the interface to
   admission (traffic) control that is based "only" on resource
   availability. In this document we describe a set of extensions to
   RSVP for supporting policy based admission control as well. The scope
   of this document is limited to these extensions and does not advocate
   specific architectures for policy based controls.

   For the purpose of this document we do not differentiate between
   Policy Decision Point (PDP) and Local Decision Point (LDPs) as
   described in [RAP]. The term PDP should be assumed to include LDP as
   well.

Herzog                      Standards Track                     [Page 2]
RFC 2750           RSVP Extensions for Policy Control       January 2000

2  A Simple Scenario

   It is generally assumed that policy enforcement (at least in its
   initial stages) is likely to concentrate on border nodes between
   autonomous systems.

   Figure 1 illustrates a simple autonomous domain with two boundary
   nodes (A, C) which represent PEPs controlled by PDPs. A core node (B)
   represents an RSVP capable policy ignorant node (PIN) with
   capabilities limited to default policy handling (Section 4.2).

                     PDP1                        PDP2
                      |                           |
                      |                           |
                    +---+         +---+         +---+
                    | A +---------+ B +---------+ C |