Network switch having source port queuing and methods, systems and computer program products for flow level congestion control suitable for use with a network switch having source port queuing
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 3, 2004
Grant Date -
N/A
app pub date -
Jan 31, 2000
filing date -
Jan 31, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A network switch as well as methods, systems and computer program products for controlling congestion at a granularity of less than a link are provided. Such finer granularity may be provided by pausing traffic at a source port level of a network switch. The network switch which transmitted a message which resulted in congestion being detected is notified of the congestion and pauses the communications from the source port of the message while maintaining communications over the link from other source ports. Such source port level congestion control may be provided by a network switch having a sub-queue of its output queues where each sub-queue corresponds to an input port. Source port level pausing of transmissions may then be provided by pausing the sub-queue associated with a source port.
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