MUMBAI, India, Aug. 12 -- Intellectual Property India has published a patent application (202541008244 A) filed by Ciena Corporation on January 31, 2025, for Loop Detection And Prevention In Multi-Protocol Routing Environment.
Inventors include Ghulam Mustafa; and Gagan Garg.
The application for the patent was published on August 07, 2026, under issue no. 32/2026.
Abstract: A method, implemented at a provider edge (PE) router, for detecting and preventing routing loops in a network with a multi-protocol routing environment, includes steps of defining (81) a unique loop detection route that is either unused as a route in the network (10) or has a prefix that is non-overlapping with any other route in a network (10); redistributing (82) a set of routes, including the unique loop detection route, into another routing protocol, thereby attaching loop prevention metadata to the redistributed routes; receiving (83), from a customer edge (CE) router (14), at least one route that was previously redistributed into a third routing protocol; and identifying (84), upon a match of the unique loop detection route with the at least one route, that a routing loop condition exists due to a loss of the loop prevention metadata in the third routing protocol. FIG. 5
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