US 11,870,684 B2
Micro-loop avoidance in networks
Sami Boutros, Union City, CA (US); Sowmya Chandran, San Jose, CA (US); Ram Parameswaran, San Jose, CA (US); Arun Prakash, Santa Clara, CA (US); and Muthurajah Sivabalan, Kanata (CA)
Assigned to Ciena Corporation, Hanover, MD (US)
Filed by Ciena Corporation, Hanover, MD (US)
Filed on Sep. 6, 2022, as Appl. No. 17/903,200.
Claims priority of provisional application 63/242,318, filed on Sep. 9, 2021.
Prior Publication US 2023/0071325 A1, Mar. 9, 2023
Int. Cl. H04L 45/28 (2022.01); H04L 45/00 (2022.01); H04L 45/023 (2022.01)
CPC H04L 45/28 (2013.01) [H04L 45/023 (2013.01); H04L 45/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A node configured for micro-loop avoidance, the node comprising:
a plurality of ports and switching circuitry configured to switch packets between the plurality of ports, and a controller configured to
detect a remote link failure in a network and identify an associated Point of Local Repair (PLR),
determine destinations in the network that are impacted due to the remote link failure, and
cause installation of a temporary tunnel to the PLR that is located adjacent to the remote link failure, wherein the temporary tunnel forwards traffic for the determined destinations to the PLR which reroutes the traffic via a loop-free backup path.