Network switch enhancements directed to processing of internal operations in the network switch
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United States of America Patent
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Jun 14, 2005
Issued Date -
N/A
app pub date -
Jun 29, 2000
filing date -
Jun 28, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of processing internal operations in a network switch includes the steps of constructing a lookup table in system memory by snooping a communication channel in a network switch for lookup table information. Upon detection of lookup table information on the communication channel, the lookup table information is transmitted to a remote system memory, thereby constructing a lookup table in the remote system memory. DMA operations are performed by providing a DMA descriptor including a reload field therein. The DMA descriptor is processed, and a location of a next DMA descriptor is identified based upon a condition of the reload field. The lookup table in remote system memory enables CPU access to the lookup table without requiring communication on the communication channel. The condition of the reload field enables flexible DMA descriptor handling. A network switch also includes elements associated with this method.
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