Admission control in a network device
First Claim
Patent Images
1. A network device configured to control communication of data frames between stations, comprising:
- a plurality of receive ports configured to receive data frames from the stations;
a buffer configured to store address pointers corresponding to locations in an external memory available for storing data frames;
buffer control logic configured to;
detect when a number of address pointers in the buffer reaches a threshold, andtransmit a signal to the data frame processing logic indicating that admission control is enabled when the threshold is detected; and
data frame processing logic configured to;
determine a priority associated with a received data frame,determine whether admission control is enabled, anddetermine whether to drop the received data frame based on the priority and whether admission control is enabled.
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Abstract
A network device that controls the communication of data frames between stations performs an admission control procedure to reduce congestion on the network device. The network device receives data frames from a number of receive ports and reads a portion of a received data frame to determine a priority associated with the received data frame. When admission control is enabled, the network device determines whether to drop the received data frame based on the priority or some other predetermined criteria.
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Citations
19 Claims
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1. A network device configured to control communication of data frames between stations, comprising:
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a plurality of receive ports configured to receive data frames from the stations; a buffer configured to store address pointers corresponding to locations in an external memory available for storing data frames; buffer control logic configured to; detect when a number of address pointers in the buffer reaches a threshold, and transmit a signal to the data frame processing logic indicating that admission control is enabled when the threshold is detected; and data frame processing logic configured to; determine a priority associated with a received data frame, determine whether admission control is enabled, and determine whether to drop the received data frame based on the priority and whether admission control is enabled. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a network device that controls communication of data frames between stations, a method comprising:
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receiving data frames from the stations; determining a priority associated with a received data frame; detecting a condition on the network device, the condition being associated with an amount of space available in an external memory for storing the received data frames; enabling admission control on the network device when the condition is detected; and determining, based on the priority of the received data frame and whether admission control is enabled, whether to drop the received data frame. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A network device configured to control communication of data frames in a network, comprising:
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a plurality of receive ports configured to receive data frames; a buffer configured to store pointers corresponding to locations in an external memory available for storing data frames; and processing logic configured to; detect when a number of pointers in the buffer reaches a threshold, initiate admission control when the number of pointers reaches the threshold, identify a priority associated with a received data frame, and determine, based on the priority of the received data frame, whether to drop the received data frame. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification