US 11,838,174 B2
Multicast fast failover handling
Tristan Lloyd Mullis, Pullman, WA (US); Steven D. Herrmann, Pullman, WA (US); and Robert Meine, Port Richey, FL (US)
Assigned to Schweitzer Engineering Laboratories, Inc., Pullman, WA (US)
Filed by Schweitzer Engineering Laboratories, Inc., Pullman, WA (US)
Filed on Feb. 24, 2022, as Appl. No. 17/679,339.
Prior Publication US 2023/0269128 A1, Aug. 24, 2023
Int. Cl. H04L 12/18 (2006.01); H04L 41/0654 (2022.01); H04L 45/00 (2022.01)
CPC H04L 41/0654 (2013.01) [H04L 12/18 (2013.01); H04L 45/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for multicast fast failover handling in a network comprising:
calculating failover meta data for each failover route of a plurality of failover routes for a network;
grouping each failover route of the plurality of failover routes into a split failover route grouping based on the failover meta data;
for all split failover route groupings, calculating one or more path segments, wherein a path segment comprises one or more connections between networking devices on the network, the one or more connections are common to the failover routes of a given split failover route grouping, and the path segment ends at a networking device where two or more failover routes of the plurality of failover routes diverge from each other;
performing collision detection between the split failover trace groupings to identify path segments that collide; and
applying route tagging operations to network failover traffic for the path segments that collide.