Diameter Maintenance and M. Jones
Extensions (DIME) M. Liebsch
Internet-Draft L. Morand
Intended status: Standards Track February 15, 2014
Expires: August 19, 2014
Diameter Group Signaling
draft-ietf-dime-group-signaling-03.txt
Abstract
In large network deployments, a single Diameter peer can support over
a million concurrent Diameter sessions. Recent use cases have
revealed the need for Diameter peers to apply the same operation to a
large group of Diameter sessions concurrently. The Diameter base
protocol commands operate on a single session so these use cases
could result in many thousands of command exchanges to enforce the
same operation on each session in the group. In order to reduce
signaling, it would be desirable to enable bulk operations on all (or
part of) the sessions managed by a Diameter peer using a single or a
few command exchanges. This document specifies the Diameter protocol
extensions to achieve this signaling optimization.
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on August 19, 2014.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 6
3.1. Building and Modifying Session Groups . . . . . . . . . . 6
3.2. Issuing Group Commands . . . . . . . . . . . . . . . . . . 6
3.3. Permission Model . . . . . . . . . . . . . . . . . . . . . 7
4. Protocol Description . . . . . . . . . . . . . . . . . . . . . 8
4.1. Session Grouping . . . . . . . . . . . . . . . . . . . . . 8
4.1.1. Group assignment at session initiation . . . . . . . . 8
4.1.2. Removing a session from a session group . . . . . . . 10
4.1.3. Mid-session group assignment modifications . . . . . . 11
4.2. Session Grouping Capability Discovery . . . . . . . . . . 12
4.2.1. Implicit Capability Discovery . . . . . . . . . . . . 12
4.2.2. Explicit Capability Discovery . . . . . . . . . . . . 12
4.3. Releasing a Session Group Identifier . . . . . . . . . . . 12
4.4. Performing Group Operations . . . . . . . . . . . . . . . 13
4.4.1. Sending Group Commands . . . . . . . . . . . . . . . . 13
4.4.2. Receiving Group Commands . . . . . . . . . . . . . . . 13
4.4.3. Error Handling for Group Commands . . . . . . . . . . 14
4.4.4. Single-Session Fallback . . . . . . . . . . . . . . . 14
5. Operation with Proxies Agents . . . . . . . . . . . . . . . . 15
6. Commands Formatting . . . . . . . . . . . . . . . . . . . . . 16
6.1. Formatting Example: Group Re-Auth-Request . . . . . . . . 16
7. Attribute-Value-Pairs (AVP) . . . . . . . . . . . . . . . . . 17
7.1. Session-Group-Info AVP . . . . . . . . . . . . . . . . . . 17
7.2. Session-Group-Feature-Vector AVP . . . . . . . . . . . . . 17
7.3. Session-Group-Id AVP . . . . . . . . . . . . . . . . . . . 18
7.4. Session-Group-Action AVP . . . . . . . . . . . . . . . . . 18
8. Result-Code AVP Values . . . . . . . . . . . . . . . . . . . . 19
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