ENABLING VIRTUAL QUEUES WITH QOS AND PFC SUPPORT AND STRICT PRIORITY SCHEDULING
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United States of America Patent
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Issued Date -
May 14, 2015
app pub date -
Nov 11, 2014
filing date -
Nov 11, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
To reduce latency in a network device that buffer packets in different queues based on class of service, packets received from a network are stored in physical queues according to a class of service associated with the packets and a class of service associated with each of the physical queues. The physical queues are scheduled based quality of service requirements of their associated class of service. The physical queues are shadowed by virtual queues, and whether congestion exists in at least one of the virtual queues is determined. Packets departing from at least one of the physical queues are marked when congestion exists in at least one of the virtual queues. The service rate of the virtual queues is set to be less than or equal to a port link rate of the network device.
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