Queueing technique for multiple sources and multiple priorities
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United States of America Patent
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Jun 9, 2009
Grant Date -
Apr 20, 2006
app pub date -
Oct 18, 2004
filing date -
Oct 18, 2004
priority date (Note) -
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Abstract
A method of dealing equitably with traffic from multiple VPNs feeding into a single router utilizes the weighted fair queueing (WFQ) technique of the prior art in combination with a “service level” queue comprising a set of tokens defining the class of service (COS) with the next packet to be transmitted and a queue selector that functions to query each queue in a round robin fashion. The service level queue ensures that the higher priority traffic will be transmitted first, while the queue selector ensures that each VPN will receive similar service. The queue selector may be “weighted” in that if a particular VPN generates substantially more traffic than the other VPNS, that VPN will be selected more than once during a round robin cycle to transmit a packet (“weighted round robin” WFQ).
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