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. 15, 2026
Filed:
Feb. 13, 2024
Cisco Technology, Inc., San Jose, CA (US);
Raja Janardanan, Milpitas, CA (US);
Sanjay Kumar Hooda, Pleasanton, CA (US);
Prakash C. Jain, Fremont, CA (US);
Ganesh Sankaranarayanan, Cupertino, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Techniques for edge nodes of a network fabric to identify L2 broadcast messages that have been looped through connections with dual-homed, active-active endpoints. The edge nodes receive an L2 broadcast message from the network fabric, and store a source MAC address of the message in a local map-cache. The edge devices then forward the L2 broadcast message to the endpoint. The edge nodes may receive the messages that have been looped through the connections with the endpoint, and compare the source MAC address of the messages with the source MAC addresses stored in the local map-cache. If the source MAC address of the message matches to an address in the local map-cache, the edge nodes drop the message. However, if the source MAC address does not match to an address in the local map-cache, the edge nodes add the source MAC address to a source MAC address table.