Toshiba's Router Architecture Extensions for ATM : Overview (RFC2098)
Original Publication Date: 1997-Feb-01
Included in the Prior Art Database: 2019-Feb-16
Internet Society Requests For Comment (RFCs)
Y. Katsube: AUTHOR [+2]
This memo describes a new internetworking architecture which makes better use of the property of ATM. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.
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.
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.
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.
Katsube, et. al. Informational [Page 1]
RFC 2098 Toshiba’s Router Extension for ATM February 1997
- 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 support future large scale Internet which accommodates huge amount of traffic with certain QoS requirements. Two major schools of investigations can be seen in IETF whose main purpose is to improve ability of the Internet w...