Diameter Agent Overload
draft-ietf-dime-agent-overload-02

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Document Type Active Internet-Draft (dime WG)
Last updated 2015-08-31
Replaces draft-donovan-dime-agent-overload
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Diameter Maintenance and Extensions (DIME)                    S. Donovan
Internet-Draft                                                    Oracle
Intended status: Standards Track                         August 31, 2015
Expires: March 3, 2016

                        Diameter Agent Overload
                 draft-ietf-dime-agent-overload-02.txt

Abstract

   This specification documents an extension to the Diameter Overload
   Indication Conveyance (DOIC) base solution.  The extension addresses
   the handling of occurrences of overload of a Diameter agent, or more
   generally, a Diameter peer.

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 March 3, 2016.

Copyright Notice

   Copyright (c) 2015 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

Donovan                   Expires March 3, 2016                 [Page 1]
Internet-Draft           Diameter Agent Overload             August 2015

   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology and Abbreviations . . . . . . . . . . . . . . . .   4
   3.  Peer Report Use Cases . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Diameter Agent Overload Use Cases . . . . . . . . . . . .   5
       3.1.1.  Single Agent  . . . . . . . . . . . . . . . . . . . .   5
       3.1.2.  Redundant Agents  . . . . . . . . . . . . . . . . . .   6
       3.1.3.  Agent Chains  . . . . . . . . . . . . . . . . . . . .   7
     3.2.  Diameter Endpoint Use Cases . . . . . . . . . . . . . . .   8
       3.2.1.  Hop-by-hop Abatement Algorithms . . . . . . . . . . .   8
   4.  Interaction Between Host/Realm and Peer Overload Reports  . .   8
   5.  Peer Report Behavior  . . . . . . . . . . . . . . . . . . . .   8
     5.1.  Capability Announcement . . . . . . . . . . . . . . . . .   8
       5.1.1.  Reacting Node Behavior  . . . . . . . . . . . . . . .   9
       5.1.2.  Reporting Node Behavior . . . . . . . . . . . . . . .   9
     5.2.  Peer Report Overload Report Handling  . . . . . . . . . .  11
       5.2.1.  Overload Control State  . . . . . . . . . . . . . . .  11
       5.2.2.  Reporting Node Maintenance of Peer Report OCS . . . .  12
       5.2.3.  Reacting Node Maintenance of Peer Report OCS  . . . .  12
       5.2.4.  Peer Report Reporting Node Behavior . . . . . . . . .  14
       5.2.5.  Peer Report Reacting Node Behavior  . . . . . . . . .  14
   6.  Peer Report AVPs  . . . . . . . . . . . . . . . . . . . . . .  15
     6.1.  OC-Supported-Features AVP . . . . . . . . . . . . . . . .  15
       6.1.1.  OC-Feature-Vector . . . . . . . . . . . . . . . . . .  15
       6.1.2.  OC-Peer-Algo  . . . . . . . . . . . . . . . . . . . .  16
     6.2.  OC-OLR AVP  . . . . . . . . . . . . . . . . . . . . . . .  16
       6.2.1.  OC-Report-Type AVP  . . . . . . . . . . . . . . . . .  17
     6.3.  OC-SourceID . . . . . . . . . . . . . . . . . . . . . . .  17
     6.4.  Attribute Value Pair flag rules . . . . . . . . . . . . .  17
   7.  IANA  Considerations  . . . . . . . . . . . . . . . . . . . .  17
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  18
   10. Normative References  . . . . . . . . . . . . . . . . . . . .  18
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  19

1.  Introduction

   This document defines the behavior of Diameter nodes when Diameter
   agents enter an overload condition and send an overload report
   requesting a reduction of traffic.
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