Diameter Agent Overload
draft-donovan-dime-agent-overload-00

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Last updated 2013-10-21
Replaced by draft-ietf-dime-agent-overload, rfc8581
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Diameter Maintenance and Extensions                           S. Donovan
(DIME)                                                            Oracle
Internet-Draft                                          October 21, 2013
Intended status: Standards Track
Expires: April 24, 2014

                        Diameter Agent Overload
                draft-donovan-dime-agent-overload-00.txt

Abstract

   This specification documents an extension to the Diameter Overload
   Control (DOC) base solution.  The extension addresses the handling of
   agent overload.

Requirements

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on April 24, 2014.

Copyright Notice

   Copyright (c) 2013 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

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   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   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
   2.  Terminology and Abbreviations  . . . . . . . . . . . . . . . .  4
   3.  Diameter Agent Overload Use Cases  . . . . . . . . . . . . . .  4
     3.1.  Single Agent . . . . . . . . . . . . . . . . . . . . . . .  4
     3.2.  Redundant Agents . . . . . . . . . . . . . . . . . . . . .  5
     3.3.  Agent Chains . . . . . . . . . . . . . . . . . . . . . . .  6
     3.4.  Interaction between agent and end-point overload . . . . .  7
   4.  Agent Overload Report  . . . . . . . . . . . . . . . . . . . .  8
     4.1.  OC-Feature-Vector AVP  . . . . . . . . . . . . . . . . . .  8
     4.2.  OC-OLR AVP . . . . . . . . . . . . . . . . . . . . . . . .  8
       4.2.1.  OC-Reporting-Node  . . . . . . . . . . . . . . . . . .  9
   5.  Agent Overload Behavior  . . . . . . . . . . . . . . . . . . .  9
     5.1.  Agent Overload Reporting Node Behavior . . . . . . . . . .  9
     5.2.  Agent Overload Reacting Node Behavior  . . . . . . . . . . 10
   6.  IANA      Considerations . . . . . . . . . . . . . . . . . . . . . 11
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 11
   8.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 11
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 12
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 12
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 12
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 12

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1.  Introduction

   This document defines the behavior of Diameter nodes when Diameter
   agents become overloaded.

   The base Diameter overload specification [I-D.docdt-dime-ovli]
   addresses the handling of overload when a Diameter endpoint (a
   Diameter Client or Diameter server as defined in [RFC6733]) becomes
   overloaded.

   In the base specification case, the goal is to react to the overload
   as close to the generator of the Diameter traffic as is feasible.
   When possible this is done at the originator of the traffic,
   generally referred to as a Diameter Client.  A Diameter agent can
   also do the overload mitigation.  For instance, a Diameter agent can
   handle Diameter overload mitigation when it knows that a Diameter
   client does not support the ability to do the mitigation.

   This document extends the base Diameter endpoint overload
   specification to address the case when Diameter agents become
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