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Introduction to Diameter: White Paper
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HP Part Number: T1428-90011

Edition: www.docs.hp.com

Published: September 2002

© Copyright 2002 Hewlett-Packard Company.

Table of Contents

1 Introduction to Diameter
Introduction
The Case for Diameter
Limited Size of Attribute Data
Limited Number of Concurrent Pending Messages
Inability to Control Flow to Servers
Limited Server Failure Detection
Silent Discarding of Packets
Inefficient Server Fail-Over
Inefficient Use of RADIUS Servers in Proxy Environments
No Unsolicited Server Messages
Replay Attacks
Only Hop-by-Hop Security; No End-to-End Security
No Support for Vendor-Specific Commands
No Alignment Requirements
Mandatory Shared Secret
Summary of Diameter Advantages over RADIUS
Better Transport
Better Proxying
Better Session Control
Better Security
Diameter Architecture
Overview of SCTP
Types of Diameter Nodes
Client
Server
Relay Agent
Proxy Agent
Redirect Agent
Translation Agent
Diameter Messages
Diameter Message Format
Diameter AVP Format
The Diameter Identity
Diameter Message Content and Routing
Diameter Peers
Capabilities Exchange
Transport Failure Detection
Failover/Failback Procedures
Accounting
The NASREQ Application
The Mobile IPv4 Application
The CMS Security Application
References
Diameter Protocol Drafts.
Requirements Documents.
Other References.

List of Figures

1-1 Diameter Protocol Architecture
   


Chapter 1 Introduction to Diameter  
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