Method and system for managing traffic in a packet network environment
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United States of America Patent
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Aug 24, 2004
Issued Date -
N/A
app pub date -
Feb 11, 2002
filing date -
Feb 11, 2002
priority date (Note) -
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Abstract
A network switch includes a first content addressable memory (CAM), a second CAM, a binding lookup table (BLT), and a packet manager. The BLT extracts two sets of header information from ingressing packets. The first set is applied the first CAM to retrieve a service policy index. The second set of header information is applied to the second CAM to determine whether a connection already exists. If a connection exists, a flow transmission control block (fTCB) pointer is retrieved from the second CAM. Otherwise, if there is no current connection for the packet, a check is made of the service policy index to determine the level of service associated with the packet. Based on the assigned service level, a new fTCB pointer is retrieved, or alternatively, client and server TCB pointers are retrieved. The packet manager then processes the packet according to which TCB pointer is retrieved.
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