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:
Sep. 08, 2009
Filed:
Apr. 01, 2005
Gaetano Borgione, San Jose, CA (US);
Gaetano Borgione, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A method, system, and computer program product are presented to optimize OSI Level 2 switch forwarding of frames comprising IP addresses, 802.1 QinQ VLAN identifiers, multi-protocol label switching labels, and any other usable information meaningful to derive an L2 forwarding result on frames. In one embodiment, a 16-bit key is included as a prefix to a 48-bit OSI Level 2 address entry, thereby allowing the inclusion of a 32-bit OSI Level 3 address in the lookup table (e.g., a complete IP version 4 address). Implementations of such a solution are presented to resolve address aliasing issues experienced with multicast group destination addresses, including single source multicast. Solutions to optimizing forwarding of frames in an IEEE 802.1 QinQ environment are also presented. A result of these implementations can be reduction of the amount of unnecessary network traffic generated by a network switch incorporating such an OSI Level 2 address lookup table.