MUMBAI, India, July 13 -- Intellectual Property India has published a patent application (202647081590 A) filed by Ciena Corporation on July 02, 2026, for Detecting Segment Expansion Changes In Segment Routing Using Dynamic Shortest Path First.

Inventors include Defilippi, Todd; and Alaettinoglu, Cengiz.

The application for the patent was published on July 10, 2026, under issue no. 28/2026.

Abstract: Systems and methods for detecting segment expansion changes in Segment Routing using Dynamic Shortest Path First (SPF) include tracking (81 ) one or more provisioned paths for one or more Segment Routing (SR) policies in a Segment Routing network (10), based on Shortest Path First (SPF) pairs associated with segments of the one or more provisioned paths; responsive (82) to routing changes in the Segment Routing network (10), determining which of the SPF pairs are affected due to their SPF trees changing based on the routing changes; and determining (83) which of the one or more SR policies have veered off of their respective provisioned path based on which of the SPF pairs are affected by the routing changes.

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