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Proceedings Paper

Introduction to multiprotocol over ATM (MPOA)
Author(s): Andre N. Fredette
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Paper Abstract

Multiprotocol over ATM (MPOA) is a new protocol specified by the ATM Forum. MPOA provides a framework for effectively synthesizing bridging and routing with ATM in an environment of diverse protocols and network technologies. The primary goal of MPOA is the efficient transfer of inter-subnet unicast data in a LAN Emulation (LANE) environment. MPOA integrates LANE and the next hop resolution protocol (NHRP) to preserve the benefits of LAN Emulation, while allowing inter-subnet, internetwork layer protocol communication over ATM VCCs without requiring routers in the data path. It reduces latency and the internetwork layer forwarding load on backbone routers by enabling direct connectivity between ATM-attached edge devices (i.e., shortcuts). To establish these shortcuts, MPOA uses both routing and bridging information to locate the edge device closest to the addressed end station. By integrating LANE and NHRP, MPOA allows the physical separation of internetwork layer route calculation and forwarding, a technique known as virtual routing. This separation provides a number of key benefits including enhanced manageability and reduced complexity of internetwork layer capable edge devices. This paper provides an overview of MPOA that summarizes the goals, architecture, and key attributes of the protocol. In presenting this overview, the salient attributes of LANE and NHRP are described as well.

Paper Details

Date Published: 6 October 1997
PDF: 8 pages
Proc. SPIE 3233, Broadband Networking Technologies, (6 October 1997); doi: 10.1117/12.290458
Show Author Affiliations
Andre N. Fredette, Bay Networks, Inc. (United States)

Published in SPIE Proceedings Vol. 3233:
Broadband Networking Technologies
Seyhan Civanlar; Indra Widjaja, Editor(s)

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