Browse Prior Art Database

Native ATM Support for ST2+ (RFC1946)

IP.com Disclosure Number: IPCOM000004175D
Original Publication Date: 1996-May-01
Included in the Prior Art Database: 2019-Feb-12
Document File: 21 page(s) / 31K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

S. Jackowski: AUTHOR

Related Documents

10.17487/RFC1946: DOI

Abstract

This memo describes a working implementation which enables applications to directly invoke ATM services in the following environments: ATM to internet, internet to ATM, and internet to internet across ATM. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 7% of the total text.

Network Working Group S. Jackowski Request for Comments: 1946 NetManage Incorporated Category: Informational May 1996

Native ATM Support for ST2+

Status of This Memo

This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

Abstract

As the demand for networked realtime services grows, so does the need for shared networks to provide deterministic delivery services. Such deterministic delivery services demand that both the source application and the network infrastructure have capabilities to request, setup, and enforce the delivery of the data. Collectively these services are referred to as bandwidth reservation and Quality of Service (QoS).

The IETF is currently working on an integrated services model to support realtime services on the Internet The IETF has not yet focused on the integration of ATM and its inherent QoS and bandwidth allocation mechanisms for delivery of realtime traffic over shared wires. (ATM hardware and interfaces provide the network infrastructure for the determinitic data delivery, however the host resident protocol stacks and applications need more attention.)

Current IETF efforts underway in the IP over ATM (ipatm) working group rely on intserv, rsvp and ST2 to address QoS issues for ATM. As such, RFC 1577 and the ATM Forum’s Lan Emulation do not provide direct QoS and bandwidth allocation capabilities to network applications. Without providing a mapping of reservations-style QoS to ATM signalling, ATM will remain a ’wire’ rather than a shared media infrastructure component.

This memo describes a working implementation which enables applications to directly invoke ATM services in the following environments:

- ATM to internet, - internet to ATM, and - internet to internet across ATM.

Jackowski Informational [Page 1]

RFC 1946 Native ATM Support for ST2+ May 1996

Table of Contents

1.0 Introduction...............................................2 2.0 ST-2 and ST-2+.............................................5 3.0 Implementation Issues for Reservations over ATM............6 3.1 Addressing.................................................6 3.2 Changes to Bandwidth and QoS...............................6 3.3 Multicasting...............................................7 3.4 Receiver Initiated JOIN Requests to Multicast Groups.......8 3.5 Computation of QoS Parameters..............................8 3.6 Use of HELLOs..............................................9 4.0 Reservation Signalling with ATM............................9 4.1 Embedded Reservation Signalling within Q.2931.............10 4.2 In-Band Reservation Signalling............................11 4.3 Dedicated Virtual Circuits for Reservation Signalling.....12 4.4 Reservation Signalling via IP over ATM or LAN Emulation...13 4.5 Summary of Reservation Signalling Options.................14 5.0 Mapping Reservation QoS to ATM QoS........................15 5.1 CPCS-SDU Size Co...

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