RFC 2381 (rfc2381) - Page 2 of 43

Interoperation of Controlled-Load Service and Guaranteed Service with ATM

RFC 2381         Interoperation of CLS and GS with ATM       August 1998


Table of Contents

1.0 Introduction ....................................................  3
    1.1 General System Architecture .................................  4
    1.2 Related Documents ...........................................  7
2.0 Major Protocol Features for Traffic Management and QoS ..........  8
    2.1 Service Category and Bearer Capability ......................  8
        2.1.1 Service Categories for Guaranteed Service .............  9
        2.1.2 Service Categories for Controlled Load ................ 10
        2.1.3 Service Categories for Best Effort .................... 11
    2.2 Cell Loss Priority Bit, Tagging and Conformance Definitions . 11
    2.3 ATM Adaptation Layer ........................................ 13
    2.4 Broadband Low Layer Information ............................. 13
    2.5 Traffic Descriptors ......................................... 13
        2.5.1 Translating Traffic Descriptors for Guaranteed Service. 15
        2.5.2 Translating Traffic Descriptors for Controlled Load
              Service  .............................................. 18
        2.5.3 Translating Traffic Descriptors for Best Effort Service 19
    2.6 QoS Classes and Parameters .................................. 19
    2.7 Additional Parameters -- Frame Discard Mode ................. 22
3.0 Additional IP-Integrated Services Protocol Features ............. 22
    3.1 Path Characterization Parameters for IP Integrated Services . 22
    3.2 Handling of Excess Traffic .................................. 24
    3.3 Use of Guaranteed Service Adspec Parameters and Slack Term .. 25
4.0 Miscellaneous Items ............................................. 26
    4.1 Units Conversion ............................................ 26
5.0 Summary of ATM VC Setup Parameters for Guaranteed Service ....... 27
    5.1 Encoding GS Using Real-Time VBR ............................. 28
    5.2 Encoding GS Using CBR ....................................... 29
    5.3 Encoding GS Using Non-Real-Time VBR ......................... 30
    5.4 Encoding GS Using ABR ....................................... 30
    5.5 Encoding GS Using UBR ....................................... 30
    5.6 Encoding GS Using UNI 3.0 and UNI 3.1. ...................... 31
6.0 Summary of ATM VC Setup Parameters for Controlled Load Service .. 32
    6.1 Encoding CLS Using Non-Real-Time VBR ........................ 32
    6.2 Encoding CLS Using ABR ...................................... 33
    6.3 Encoding CLS Using CBR ...................................... 35
    6.4 Encoding CLS Using Real-Time VBR ............................ 35
    6.5 Encoding CLS Using UBR ...................................... 35
    6.6 Encoding CLS Using UNI 3.0 and UNI 3.1. ..................... 35
7.0 Summary of ATM VC Setup Parameters for Best Effort Service ...... 36
    7.1 Encoding Best Effort Service Using UBR ...................... 37
8.0 Security Considerations ......................................... 38
9.0 Acknowledgements ................................................ 38
Appendix 1  Abbreviations ........................................... 39
References .......................................................... 40
Authors' Addresses .................................................. 42
Full Copyright Statement ............................................ 43



Garrett & Borden            Standards Track