RSVP Extensions for Admission Priority
RFC 6401

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Internet Engineering Task Force (IETF)                    F. Le Faucheur
Request for Comments: 6401                                       J. Polk
Category: Standards Track                                          Cisco
ISSN: 2070-1721                                              K. Carlberg
                                                                     G11
                                                            October 2011

                 RSVP Extensions for Admission Priority

Abstract

   Some applications require the ability to provide an elevated
   probability of session establishment to specific sessions in times of
   network congestion.  When supported over the Internet Protocol suite,
   this may be facilitated through a network-layer admission control
   solution that supports prioritized access to resources (e.g.,
   bandwidth).  These resources may be explicitly set aside for
   prioritized sessions, or may be shared with other sessions.  This
   document specifies extensions to the Resource reSerVation Protocol
   (RSVP) that can be used to support such an admission priority
   capability at the network layer.

   Based on current security concerns, these extensions are intended for
   use in a single administrative domain.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6401.

Copyright Notice

   Copyright (c) 2011 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of

Le Faucheur, et al.          Standards Track                    [Page 1]
RFC 6401         RSVP Extensions for Admission Priority     October 2011

   publication of this document.  Please review these documents
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   This document may contain material from IETF Documents or IETF
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   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Applicability Statement  . . . . . . . . . . . . . . . . . . .  4
   3.  Requirements Language  . . . . . . . . . . . . . . . . . . . .  4
   4.  Overview of RSVP Extensions and Operations . . . . . . . . . .  4
     4.1.  Operations of Admission Priority . . . . . . . . . . . . .  6
   5.  New Policy Elements  . . . . . . . . . . . . . . . . . . . . .  7
     5.1.  Admission Priority Policy Element  . . . . . . . . . . . .  8
       5.1.1.  Admission Priority Merging Rules . . . . . . . . . . .  9
     5.2.  Application-Level Resource Priority Policy Element . . . . 10
       5.2.1.  Application-Level Resource Priority Modifying and
               Merging Rules  . . . . . . . . . . . . . . . . . . . . 11
     5.3.  Default Handling . . . . . . . . . . . . . . . . . . . . . 12
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 12
     6.1.  Use of RSVP Authentication between RSVP Neighbors  . . . . 13
     6.2.  Use of INTEGRITY object within the POLICY_DATA Object  . . 13
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 14
   8.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 16
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 17
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 17
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 18
   Appendix A.  Examples of Bandwidth Allocation Model for