Diameter Routing Message Priority
draft-ietf-dime-drmp-06

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Document Type Active Internet-Draft (dime WG)
Last updated 2016-05-18
Replaces draft-donovan-dime-drmp
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Diameter Maintenance and Extensions (DIME)                    S. Donovan
Internet-Draft                                                    Oracle
Intended status: Standards Track                            May 18, 2016
Expires: November 19, 2016

                   Diameter Routing Message Priority
                      draft-ietf-dime-drmp-06.txt

Abstract

   When making routing and resource allocation decisions, Diameter nodes
   currently have no generic mechanism to determine the relative
   priority of Diameter messages.  This document addresses this by
   defining a mechanism to allow Diameter endpoints to indicate the
   relative priority of Diameter transactions.  With this information
   Diameter nodes can factor that priority into routing, resource
   allocation and overload abatement decisions.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on November 19, 2016.

Copyright Notice

   Copyright (c) 2016 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
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   include Simplified BSD License text as described in Section 4.e of

Donovan                 Expires November 19, 2016               [Page 1]
Internet-Draft                    DOIC                          May 2016

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Applicability . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology and Abbreviations . . . . . . . . . . . . . . . .   4
   3.  Conventions Used in This Document . . . . . . . . . . . . . .   4
   4.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  First Responder Related Signaling . . . . . . . . . . . .   6
     5.2.  Emergency Call Related Signaling  . . . . . . . . . . . .   6
     5.3.  Differentiated Services . . . . . . . . . . . . . . . . .   6
     5.4.  Application Specific Priorities . . . . . . . . . . . . .   7
   6.  Theory of Operation . . . . . . . . . . . . . . . . . . . . .   8
   7.  Extensibility . . . . . . . . . . . . . . . . . . . . . . . .   9
   8.  Normative Behavior  . . . . . . . . . . . . . . . . . . . . .  10
   9.  Attribute Value Pairs . . . . . . . . . . . . . . . . . . . .  12
     9.1.  DRMP AVP  . . . . . . . . . . . . . . . . . . . . . . . .  12
     9.2.  Attribute Value Pair flag rules . . . . . . . . . . . . .  13
   10. Considerations When Defining Application Priorities . . . . .  13
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
     11.1.  AVP codes  . . . . . . . . . . . . . . . . . . . . . . .  14
     11.2.  New registries . . . . . . . . . . . . . . . . . . . . .  15
   12. Security Considerations . . . . . . . . . . . . . . . . . . .  15
     12.1.  Potential Threat Modes . . . . . . . . . . . . . . . . .  15
     12.2.  Denial of Service Attacks  . . . . . . . . . . . . . . .  16
     12.3.  End-to End-Security Issues . . . . . . . . . . . . . . .  16
   13. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  17
   14. References  . . . . . . . . . . . . . . . . . . . . . . . . .  17
     14.1.  Normative References . . . . . . . . . . . . . . . . . .  17
     14.2.  Informative References . . . . . . . . . . . . . . . . .  17
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   The Diameter Overload Indication Conveyance (DOIC) solution [RFC7683]
   for Diameter overload control introduces scenarios where Diameter
   routing decisions made by Diameter nodes can be influenced by the
   overload state of other Diameter nodes.  This includes the scenarios
   where Diameter endpoints and Diameter agents can throttle requests as
   a result of the target for the request being overloaded.

   With currently available mechanisms these Diameter nodes do not have
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