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Toshiba's Router Architecture Extensions for ATM : Overview (RFC2098)

IP.com Disclosure Number: IPCOM000002650D
Original Publication Date: 1997-Feb-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 15 page(s) / 41K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

Y. Katsube: AUTHOR [+3]

Abstract

This memo describes a new internetworking architecture which makes better use of the property of ATM. IP datagrams are transferred along hop-by-hop path via routers, but datagram assembly/disassembly and IP header processing are not necessarily carried out at individual routers in the proposed architecture. A concept of "Cell Switch Router (CSR)" is introduced as a new internetworking equipment, which has ATM cell switching capabilities in addition to conventional IP datagram forwarding. Proposed architecture can provide applications with high-throughput and low-latency ATM pipes while retaining current router-based internetworking concept. It also provides applications with specific QoS/bandwidth by cooperating with internetworking level resource reservation protocols such as RSVP.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 7% of the total text.

Network Working Group Y. Katsube

Request for Comments: 2098 K. Nagami

Category: Informational H. Esaki

Toshiba R&D Center

February 1997

Toshiba's Router Architecture Extensions for ATM : Overview

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

This memo describes a new internetworking architecture which makes

better use of the property of ATM. IP datagrams are transferred

along hop-by-hop path via routers, but datagram assembly/disassembly

and IP header processing are not necessarily carried out at

individual routers in the proposed architecture. A concept of "Cell

Switch Router (CSR)" is introduced as a new internetworking

equipment, which has ATM cell switching capabilities in addition to

conventional IP datagram forwarding. Proposed architecture can

provide applications with high-throughput and low-latency ATM pipes

while retaining current router-based internetworking concept. It

also provides applications with specific QoS/bandwidth by cooperating

with internetworking level resource reservation protocols such as

RSVP.

1. Introduction

The Internet is growing both in its size and its traffic volume. In

addition, recent applications often require guaranteed bandwidth and

QoS rather than best effort. Such changes make the current hop-by-

hop datagram forwarding paradigm inadequate, then accelerate

investigations on new internetworking architectures.

Roughly two distinct approaches can be seen as possible solutions;

the use of ATM to convey IP datagrams, and the revision of IP to

support flow concept and resource reservation. Integration or

interworking of these approaches will be necessary to provide end

hosts with high throughput and QoS guaranteed internetworking

services over any datalink platforms as well as ATM.

New internetworking architecture proposed in this draft is based on

"Cell Switch Router (CSR)" which has the following properties.

- It makes the best use of ATM's property while retaining current

router-based internetworking and routing architecture.

- It takes into account interoperability with future IP that

supports flow concept and resource reservations.

Section 2 of this draft explains background and motivations of our

proposal. Section 3 describes an overview of the proposed

internetworking architecture and its several remarkable features.

Section 4 discusses control architectures for CSR, which will need to

be further investigated.

2. Background and Motivation

It is considered that the current hop-by-hop best effort datagram

forwarding paradigm will not be adequate to suppo...