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US 7,889,659 B2Granted
Controlling a transmission rate of packet traffic
AssigneeCisco Technology, Inc.
InventorsRafael Mantilla Montalvo, Jorge Manuel Gonzalez, Nathan Allen Mitchell, Timothy F. Masterson, Stephen Charles Hilla, Karen A. Szypulski
Life of this patent
Estimating the term…
Abstract
Controlling a transmission rate of packet traffic includes receiving packets from a network processor. The packets are stored in a buffer associated with a processor. If an occupancy level of the buffer is greater than a predetermined threshold, it is determined that the processor is congested. A message is transmitted to the network processor indicating the processor is congested.
Claims12
A method for controlling a transmission rate of packet traffic, comprising:
- receiving a plurality of packets from a network processor;
- storing the plurality of packets in a buffer associated with at least one processor;
- determining that the at least one processor is congested by establishing that an occupancy level of the buffer is greater than a first predetermined threshold;
- transmitting a first message to the network processor indicating that the at least one processor is congested, the first message comprising a priority parameter that indicates a level of priority for the first message, the priority parameter indicating a high level of priority for the first message resulting in rapid processing of the first message at the network processor;
- decreasing a transmission rate of the network processor in response to the first message, the decreased transmission rate being greater than zero;
- determining that the at least one processor is not congested by establishing that an occupancy level of the buffer is less than a second predetermined threshold;
- transmitting a second message to the network processor indicating that the at least one processor is not congested;
- and
- increasing the transmission rate of the network processor in response to the second message.
6 more elements
A system for controlling a transmission rate of packet traffic, comprising:
- a flow controller comprising a buffer associated with at least one processor, the flow controller operates to:
- receive a plurality of packets from a network processor;
- store the plurality of packets in the buffer associated with the at least one processor;
- determine that the at least one processor is congested by establishing that an occupancy level of the buffer is greater than a first predetermined threshold;
- transmit a first message to the network processor indicating that the at least one processor is congested, the first message comprising a priority parameter that indicates a level of priority for the first message, the priority parameter indicating a high level of priority for the first message resulting in rapid processing of the first message at the network processor;
- decrease a transmission rate of the network processor in response to the first message, the decreased transmission rate being greater than zero;
- determine that the at least one processor is not congested by establishing that an occupancy level of the buffer is less than a second predetermined threshold;
- transmit a second message to the network processor indicating that the at least one processor is not congested;
- and
- increase the transmission rate of the network processor in response to the second message.
7 more elements
A computer-readable storage media comprising logic for controlling a transmission rate of packet traffic, the logic operates, when executed on a processor, to:
- receive a plurality of packets from a network processor;
- store the plurality of packets in a buffer associated with at least one processor;
- determine that the at least one processor is congested by establishing that an occupancy level of the buffer is greater than a first predetermined threshold;
- transmit a first message to the network processor indicating that the at least one processor is congested, the first message comprising a priority parameter that indicates a level of priority for the first message, the priority parameter indicating a high level of priority for the first message resulting in rapid processing of the first message at the network processor;
- decrease a transmission rate of the network processor in response to the first message, the decreased transmission rate being greater than zero;
- determine that the at least one processor is not congested by establishing that an occupancy level of the buffer is less than a second predetermined threshold;
- transmit a second message to the network processor indicating that the at least one processor is not congested;
- and
- increase the transmission rate of the network processor in response to the second message.
6 more elements
Dependencies are inferred from the claim text.