System and method for providing multiple loss and service priorities
First Claim
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1. A method for implementing service class features in a packet switch, comprising the steps of:
- (a) receiving a data packet having a header;
(b) checking an error code in an error code field of said packet header to determine if data errors occurred during transmission;
(c) determining service class parameters based on information contained in said packet header; and
(d) inserting said service class parameters in said error code field.
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Abstract
A system and method for implementing quality of service features in a packet switch calculates quality of service parameters, and inserts these parameters into the packet header before the packet reaches the switch fabric itself. When a packet is received, errorcode processing takes place and the no longer needed error code is discarded. Packet header information is used to determine, via lookup table or other means, the service class and loss priority to be assigned to the packet. These parameters are inserted in the errorcode field of the packet header before the packet is provided to the switch fabric itself.
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Citations
21 Claims
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1. A method for implementing service class features in a packet switch, comprising the steps of:
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(a) receiving a data packet having a header; (b) checking an error code in an error code field of said packet header to determine if data errors occurred during transmission; (c) determining service class parameters based on information contained in said packet header; and (d) inserting said service class parameters in said error code field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for implementing service class features in a packet switch, comprising:
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(a) means for checking an error code in an error code field of a header of a packet to determine if data errors occurred during transmission of the packet; (b) means for determining service class parameters based on information contained in said packet header; and (c) means for inserting said service class parameters in said error code field. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of implementing service class features in a packet switch, comprising the steps of:
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(a) determining service class parameters based on information contained in a header of a received packet; and (b) inserting said service class parameters in a temporarily unused error code field in said header of said received packet header before said received packet is sent through a switch fabric.
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21. A system for implementing service class features in a packet switch, comprising:
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(a) means for determining service class parameters based on information contained in a header of a received packet; and (b) means for inserting said service class parameters in a temporarily unused error code field in said header of said received packet header before said received packet is sent through a switch fabric.
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Specification