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:
Jan. 29, 2008
Filed:
Feb. 13, 2003
Mark Savoldi, Holly Springs, NC (US);
Hong-man Wu, Raleigh, NC (US);
Kenneth H. Potter, Jr., Raleigh, NC (US);
Mark Savoldi, Holly Springs, NC (US);
Hong-Man Wu, Raleigh, NC (US);
Kenneth H. Potter, Jr., Raleigh, NC (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A technique non-disruptively recovers from a processor failure in a multi-processor flow device, such as an intermediate network node of a computer network. Data relating to a particular data flow of a processor within the node is tagged with specific information used to detect and recover from a failure of the processor without affecting data from other processors of the node. A data path management device tags the data with the specific information reflecting the processor issuing the data and a state of the processor. When the tagged data subsequently passes through the data path management device, the specific information is compared with current information for the issuing processor. If the comparison indicates that the specific information is valid, the data path management device forwards the related data flow through the node. If the comparison indicates that the specific information is invalid, the data and its related data flow are discarded and 'cleanly' purged from the node.