Hewlett-Packard Development Company, L.p.

Benjamin Dodge

Robert D Snyder

Dean T Lindsay

A data switch is configured to communicate data messages in the form of multibit data unit segmented into a plurality of multibit data subunits. The data switch includes at least two separate, parallel switching units, each having a plurality of ports to communicate the multibit data subunits. Hardwired or software implemented prioritization logic provides for the initiations of transfer of data messages between the ports in response to a category of the data messages. A memory is used to store a history of prior data message transfers so that least recently transferred message types are serviced prior to those most recently switched. So as to reestablish synchronization between the parallel switching units, such as loss of a data subunit, a controller responds to a reset condition by temporarily suspending communications between affected ones of the ports and clearing the history so to recommence lock-step operations of the units.

Algorithm for resynchronizing a bit-sliced crossbar

A system and method of mapping a network topology in a network including a plurality of nodes which communicate over dedicated links which connect pairs of the nodes, where the method consists of the steps of exchanging respective network identification information between adjacent pairs of nodes, establishing communications with another of the nodes using the network identification information, obtaining network identification information of the other node from that node, using the network identification information to establish communications with other nodes, obtaining additional network identification information from those other nodes, repeating these steps until network identification information is obtained from all of the nodes of the network and using this information determine the network topology.

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Cupertino, CA, United States of America

Benjamin Dodge