Enterasys Networks, Inc.

Wang Laboratories, Inc.

John B Crowther

Robert Ryan

Leon K Woo

Robert P Ryan

Robert A MacDonald

Methods and apparatus for the provision of differentiated services in a packet-based network may be provided in a communications device such as a switch or router having input ports and output ports. Each output port is associated with a set of configurable queues that store incoming data packets from one or more input ports. A scheduling mechanism retrieves data packets from individual queues in accord with a specified configuration, providing both pure priority and proportionate de-queuing to achieve a guaranteed QoS over a connectionless network.

Methods and apparatus for differentiated services over a packet-based network

Apparatus for use in a multi-CPU data processing system (10) wherein each CPU (12-18) is coupled to a common bus (20) and through the common bus to a main memory (28). The apparatus provides a program, such as an operating system, that is operating upon each of the CPUs access to a page of data within the main memory. Each of the CPUs generates a first address for identifying a memory location or locations within a page of the main memory. The first address is modified as a function of the first address and as a function of an identification of the CPU to generate a second address for identifying a memory location or locations that are either within the same page or within another page of the main memory. The modified second address is applied to the memory for accessing the memory location or locations.

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Nashua, NH, United States of America

John B Crowther