US 12,170,611 B2
Control plane based enhanced TI-LFA node protection scheme for SR-TE paths
Muthurajah Sivabalan, Kanata (CA); Sami Boutros, Union City, CA (US); Tao Wang, Ottawa (CA); and Ashwath Narasimhan, San Jose, CA (US)
Assigned to Ciena Corporation, Hanover, MD (US)
Filed by Ciena Corporation, Hanover, MD (US)
Filed on Mar. 3, 2022, as Appl. No. 17/685,469.
Prior Publication US 2023/0283542 A1, Sep. 7, 2023
Int. Cl. H04L 45/28 (2022.01); H04L 45/00 (2022.01)
CPC H04L 45/28 (2013.01) [H04L 45/34 (2013.01)] 17 Claims
OG exemplary drawing
 
7. A node, in a Segment Routing network, comprising:
a plurality of ports interconnected via a switching fabric,
wherein the node is configured to
learn an adjacency Segment Identifier (SID) of a directly connected neighbor, wherein flooding of the adjacency SID is limited to the directly connected neighbor, and
program forwarding entries including a primary path and backup path associated with the adjacency SID, wherein the forwarding entries for the backup path are programmed only for the adjacency SID of the directly connected neighbor, for use as a Point of Local Repair (PLR), such that the backup path for the directly connected neighbor does not pass through the directly connected neighbor of the adjacency SID.