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:
Jun. 18, 2013
Filed:
Apr. 29, 2010
Yuri Tsier, Kanata, CA;
Parag Kumar Jain, Stittsville, CA;
Clarence Filsfils, Brussels, BE;
Sami Boutros, San Ramon, CA (US);
John H. W. Bettink, San Jose, CA (US);
Yuri Tsier, Kanata, CA;
Parag Kumar Jain, Stittsville, CA;
Clarence Filsfils, Brussels, BE;
Sami Boutros, San Ramon, CA (US);
John H. W. Bettink, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Disclosed are, inter alia, methods, apparatus, computer-storage media, mechanisms, and means associated with the coordinated updating of forwarding information bases (FIBs) in a multistage packet switching device, which performs at least lookup operations on multiple different FIBs in determining how to forward a packet. One embodiment uses lookup operations on two different FIBs, with these being an ingress FIB on an ingress line card and an egress FIB on an egress line card. In response to a change in the forwarding information for a stream of packets, the egress FIBs are first updated to include both the old and new forwarding information. After all egress FIBs have been updated, the ingress FIBs are updated to use the new forwarding information. This update procedure is designed to eliminate loss or duplication of packets induced during the updating of these FIBs to use the new forwarding information.