The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 06, 2002
Filed:
Apr. 10, 1998
Cary B. Robins, Newton, MA (US);
Krishna Narayanaswamy, Acton, MA (US);
Theodore L. Ross, Maynard, MA (US);
Barry A. Spinney, Wayland, MA (US);
Top Layer Networks, Inc., Westboro, MA (US);
Abstract
A process and system for switching connections of data packet flows between nodes of data processing system networks operating on diverse protocols according to the application layer information on the data packets. The process retrieves and hashes the header information to from an index into memory where a flow tag pointer is stored. The flow tag points to flow switching information that directs the forwarding of the packet. The switching information is sent along with the packet data to direct the forwarding state information about the flow is updated in the flow switching information. The hash function includes a multiplication and division by polynomials forming a hash result and a signature result. Both hash and signature are used to ensure that the information retrieved is valid. If invalid, The pre hashed header information is parsed to determine the forwarding information. This forwarding information is stored for later use and the appropriate flow tag pointer is stored in the hash result index.