ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,750, issued on March 18, was assigned to Cisco Technology Inc. (San Jose, Calif.).

"Optimized intra-VLAN multicast forwarding for software-defined access architectures" was invented by Vengada Prasad Govindan (Chennai, India) and Aswin Kuppusami (Chennai, India).

According to the abstract* released by the U.S. Patent & Trademark Office: "A multicast state is generated within a Layer 2 (L2) fabric through a set of L2 tunnel router devices within the L2 fabric. The multicast state is generated without forwarding multicast traffic through Layer 3 (L3) gateways. When a data packet is received for distribution to other devices in the L2 fabric, an underlay multicast tree is defined a...