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:
Dec. 03, 2019
Filed:
Apr. 16, 2018
Cisco Technology, Inc., San Jose, CA (US);
Doron Shoham, Shoham, IL;
Ilan Lisha, Hadera, IL;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
In one embodiment, efficient content-addressable memory entry integrity checking is performed that protects the accuracy of lookup operations. Single-bit position lookup operations are performed resulting in match vectors that include a match result for each of the content-addressable memory entries at the single-bit position. An error detection value is determined for the match vector, and compared to a predetermined detection code for the single-bit position to identify whether an error is detected in at least one of the content-addressable memory entries. In one embodiment, a particular cumulative entry error detection vector storing entry error detection information for each of the content-addressable memory entries is updated based on the match vector. The particular cumulative entry error detection vector is compared to a predetermined entry error detection vector to determine which, if any, of the content-addressable memory entries has an identifiable error, which is then corrected.