Network Working Group G. Feher
Request for Comments: 4883 K. Nemeth
Category: Informational A. Korn
BUTE
I. Cselenyi
TeliaSonera
July 2007
Benchmarking Terminology for Resource Reservation Capable Routers
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The IETF Trust (2007).
Abstract
The primary purpose of this document is to define terminology
specific to the benchmarking of resource reservation signaling of
Integrated Services (IntServ) IP routers. These terms can be used in
additional documents that define benchmarking methodologies for
routers that support resource reservation or reporting formats for
the benchmarking measurements.
Feher, et al. Informational [Page 1]
RFC 4883 Benchmarking Terms for RR Capable Routers July 2007
Table of Contents
1. Introduction ....................................................2
2. Existing Definitions ............................................3
3. Definition of Terms .............................................4
3.1. Traffic Flow Types .........................................4
3.1.1. Data Flow ...........................................4
3.1.2. Distinguished Data Flow .............................4
3.1.3. Best-Effort Data Flow ...............................5
3.2. Resource Reservation Protocol Basics .......................5
3.2.1. QoS Session .........................................5
3.2.2. Resource Reservation Protocol .......................6
3.2.3. Resource Reservation Capable Router .................7
3.2.4. Reservation State ...................................7
3.2.5. Resource Reservation Protocol Orientation ...........8
3.3. Router Load Factors ........................................9
3.3.1. Best-Effort Traffic Load Factor .....................9
3.3.2. Distinguished Traffic Load Factor ..................10
3.3.3. Session Load Factor ................................11
3.3.4. Signaling Intensity Load Factor ....................11
3.3.5. Signaling Burst Load Factor ........................12
3.4. Performance Metrics .......................................13
3.4.1. Signaling Message Handling Time ....................13
3.4.2. Distinguished Traffic Delay ........................14
3.4.3. Best-effort Traffic Delay ..........................15
3.4.4. Signaling Message Deficit ..........................15
3.4.5. Session Maintenance Capacity .......................16
3.5. Router Load Conditions and Scalability Limit ..............17
3.5.1. Loss-Free Condition ................................17
3.5.2. Lossy Condition ....................................18
3.5.3. QoS Compliant Condition ............................19
3.5.4. Not QoS Compliant Condition ........................20
3.5.5. Scalability Limit ..................................20
4. Security Considerations ........................................21
5. Acknowledgements ...............................................21
6. References .....................................................21
6.1. Normative References ......................................21
6.2. Informative References ....................................21
1. Introduction
Signaling-based resource reservation using the IntServ paradigm [4]
is an important part of the different Quality of Service (QoS)
provisioning approaches. Therefore, network operators who are
planning to deploy signaling-based resource reservation may want to
examine the scalability limitations of reservation capable routers
and the impact of signaling on their data forwarding performance.
Feher, et al. Informational [Page 2]
RFC 4883 Benchmarking Terms for RR Capable Routers July 2007
An objective way of quantifying the scalability constraints of QoS
signaling is to perform measurements on routers that are capable of
IntServ-based resource reservation. This document defines
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