Method and system for congestion control in a fibre channel switch
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United States of America Patent
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Feb 22, 2011
Issued Date -
N/A
app pub date -
Jul 20, 2004
filing date -
Jul 21, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A method and system for routing fiber channel frames using a fiber channel switch element is provided. The switch element includes logic for comparing a credit counter value with a first threshold value to enable a credit limiting feature; and a first counter that receives a signal after a frame has departed from a transmit segment and maintains a maximum value for a certain duration that is based on the first threshold value. The method includes enabling a credit limiting feature, wherein frame transmission from a certain source is delayed when the credit limiting feature is enabled. The first counter is incremented every time a frame departs and holds its maximum value based on the threshold value. When the first counter is at the maximum value, a credit-limiting signal is used to enable the credit limiting feature by setting a control bit in a control register.
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