Diameter Overload Control Requirements
draft-ietf-dime-overload-reqs-03
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Network Working Group E. McMurry
Internet-Draft B. Campbell
Intended status: Standards Track Tekelec
Expires: July 19, 2013 January 15, 2013
Diameter Overload Control Requirements
draft-ietf-dime-overload-reqs-03
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
Diameter mechanisms, listed in Section 3 are not sufficient for this
purpose. This document describes the limitations of the existing
mechanisms in Section 4. Requirements for new overload management
mechanisms are provided in Section 7.
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
Task Force (IETF). Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on July 19, 2013.
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
carefully, as they describe your rights and restrictions with respect
McMurry & Campbell Expires July 19, 2013 [Page 1]
Internet-Draft Diameter Overload Control Requirements January 2013
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
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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. Extensibility and Application Independence . . . . . . . . . . 18
7. Solution Requirements . . . . . . . . . . . . . . . . . . . . 19
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 24
9. Security Considerations . . . . . . . . . . . . . . . . . . . 24
9.1. Access Control . . . . . . . . . . . . . . . . . . . . . . 24
9.2. Denial-of-Service Attacks . . . . . . . . . . . . . . . . 24
9.3. Replay Attacks . . . . . . . . . . . . . . . . . . . . . . 25
9.4. Man-in-the-Middle Attacks . . . . . . . . . . . . . . . . 25
9.5. Compromised Hosts . . . . . . . . . . . . . . . . . . . . 25
10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.1. Normative References . . . . . . . . . . . . . . . . . . . 26
10.2. Informative References . . . . . . . . . . . . . . . . . . 26
Appendix A. Contributors . . . . . . . . . . . . . . . . . . . . 27
Appendix B. Acknowledgements . . . . . . . . . . . . . . . . . . 27
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 27
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