Diameter Overload Control Requirements
draft-ietf-dime-overload-reqs-00

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Replaces draft-mcmurry-dime-overload-reqs
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Network Working Group                                         E. McMurry
Internet-Draft                                               B. Campbell
Intended status: Standards Track                                 Tekelec
Expires: March 25, 2013                               September 21, 2012

                 Diameter Overload Control Requirements
                    draft-ietf-dime-overload-reqs-00

Abstract

   When a Diameter server or agent becomes overloaded, it needs to be
   able to gracefully reduce its load, typically by informing clients to
   reduce sending traffic for some period of time.  Otherwise, it must
   continue to expend resources parsing and responding to Diameter
   messages, possibly resulting in congestion collapse.  The existing
   mechanisms provided by Diameter are not sufficient for this purpose.
   This document describes the limitations of the existing mechanisms,
   and provides requirements for new overload management mechanisms.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on March 25, 2013.

Copyright Notice

   Copyright (c) 2012 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
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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McMurry & Campbell       Expires March 25, 2013                 [Page 1]
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Causes of Overload . . . . . . . . . . . . . . . . . . . .  3
     1.2.  Effects of Overload  . . . . . . . . . . . . . . . . . . .  5
     1.3.  Overload vs. Network Congestion  . . . . . . . . . . . . .  5
     1.4.  Diameter Applications in a Broader Network . . . . . . . .  5
     1.5.  Documentation Conventions  . . . . . . . . . . . . . . . .  6
   2.  Overload Scenarios . . . . . . . . . . . . . . . . . . . . . .  6
     2.1.  Peer to Peer Scenarios . . . . . . . . . . . . . . . . . .  7
     2.2.  Agent Scenarios  . . . . . . . . . . . . . . . . . . . . .  9
     2.3.  Interconnect Scenario  . . . . . . . . . . . . . . . . . . 12
   3.  Existing Mechanisms  . . . . . . . . . . . . . . . . . . . . . 13
   4.  Issues with the Current Mechanisms . . . . . . . . . . . . . . 14
     4.1.  Problems with Implicit Mechanism . . . . . . . . . . . . . 15
     4.2.  Problems with Explicit Mechanisms  . . . . . . . . . . . . 15
   5.  Diameter Overload Case Studies . . . . . . . . . . . . . . . . 16
     5.1.  Overload in Mobile Data Networks . . . . . . . . . . . . . 16
     5.2.  3GPP Study on Core Network Overload  . . . . . . . . . . . 17
   6.  Solution Requirements  . . . . . . . . . . . . . . . . . . . . 17
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 22
   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 22
     8.1.  Access Control . . . . . . . . . . . . . . . . . . . . . . 23
     8.2.  Denial-of-Service Attacks  . . . . . . . . . . . . . . . . 23
     8.3.  Replay Attacks . . . . . . . . . . . . . . . . . . . . . . 23
     8.4.  Man-in-the-Middle Attacks  . . . . . . . . . . . . . . . . 24
     8.5.  Compromised Hosts  . . . . . . . . . . . . . . . . . . . . 24
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 24
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 24
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 25
   Appendix A.  Contributors  . . . . . . . . . . . . . . . . . . . . 25
   Appendix B.  Acknowledgements  . . . . . . . . . . . . . . . . . . 25
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 25

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1.  Introduction
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