专利名称：Methods and apparatus for routing packets
in packet transmission networks
发明人：Israel Cidon,David W. Davenport,Jeffrey H.
Derby,John G. Dudley,Inder S. Gopal,JamesP. Janniello,Marc A. Kaplan,Francis R.Koperda,Shay Kutten,Kenneth H. Potter, Jr.
申请号：US07/900635申请日：19920618公开号：US05309433A公开日：19940503
摘要：A packet communications system provides for point-to-point packet routingand multicast packet routing to limited subsets of nodes in the network, using a routingfield in the packet header which is processed according to two different protocols. Athird protocol is provided in which a packet can be multicast to the limited subset evenwhen launched from a node which is not a member of the subset. The routing fieldincludes a first portion which contains the route labels necessary to deliver the packet tothe multicast subset. A second portion of the routing field contains the multicast subsetidentifier which can then be used to deliver the packet to all of the members of themulticast subset. Provision is made to backtrack deliver the packet to the last nodeidentified before the multicast subset if that last node is itself a member of the subset.
申请人：INTERNATIONAL BUSINESS MACHINES CORP.
代理人：Gerald R. Woods
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