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Multicast routing in internetworks and extended LANs

Multicast routing in internetworks and extended LANs Multicast Routing in Internetworks and Extended LANs Stephen E. Deering Computer Systems Laboratory Stanford University Abstract Multicasting is used within local-area networks to make distributed applications more robust and more efficient. The growing need to distribute applications acrossmultiple, interconnected networks, and the increasing availability of high-performance, high-capacity switching nodes and networks, lead us to consider providing LAN-style multicasting acrossan inter-network. In this paper, we propose extensions to two common internetwork routing algorithms~istance-vector routing and link-state routingto support low-delay datagram multicasting. We also suggest modifications to the single-spanning-tree routing algorithm, commonly used by link-layer bridges, to reduce the costs of multicasting in large extended LANs. Finally, we show how different link-layer and network-layer multicast routing algorithms can be combined hierarchically to support multicasting acrosslarge, heterogeneousiotemetwo*s. as being offered as a service for applications. ™ For networks in which all hosts share a common transmission channel, such as bus, ring, or satellite networks, the multicast capability is provided trivially and at the same cost to the oetwork as unicasting. When such networks are interconnected by store-and-forward packet switches, multicasting across the resulting intemetwork often requires the commitment of additional switching and traosmissioo resources, beyond those required for unicasting. However, as http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Multicast routing in internetworks and extended LANs

Association for Computing Machinery — Aug 1, 1988

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References (25)

Datasource
Association for Computing Machinery
Copyright
Copyright © 1988 by ACM Inc.
ISBN
0-89791-279-9
doi
10.1145/52324.52331
Publisher site
See Article on Publisher Site

Abstract

Multicast Routing in Internetworks and Extended LANs Stephen E. Deering Computer Systems Laboratory Stanford University Abstract Multicasting is used within local-area networks to make distributed applications more robust and more efficient. The growing need to distribute applications acrossmultiple, interconnected networks, and the increasing availability of high-performance, high-capacity switching nodes and networks, lead us to consider providing LAN-style multicasting acrossan inter-network. In this paper, we propose extensions to two common internetwork routing algorithms~istance-vector routing and link-state routingto support low-delay datagram multicasting. We also suggest modifications to the single-spanning-tree routing algorithm, commonly used by link-layer bridges, to reduce the costs of multicasting in large extended LANs. Finally, we show how different link-layer and network-layer multicast routing algorithms can be combined hierarchically to support multicasting acrosslarge, heterogeneousiotemetwo*s. as being offered as a service for applications. ™ For networks in which all hosts share a common transmission channel, such as bus, ring, or satellite networks, the multicast capability is provided trivially and at the same cost to the oetwork as unicasting. When such networks are interconnected by store-and-forward packet switches, multicasting across the resulting intemetwork often requires the commitment of additional switching and traosmissioo resources, beyond those required for unicasting. However, as

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