US 12,476,907 B2
BGP LU resiliency using an anycast SID and BGP driven anycast path selection
Himanshu Shah, Hopkinton, MA (US); Atul Vadera, Gurugram (IN); Jayant Kumar Bhardwaj, Gurugram (IN); and Piyush Sharma, Gurugram (IN)
Assigned to Ciena Corporation, Hanover, MD (US)
Filed by Ciena Corporation, Hanover, MD (US)
Filed on Dec. 19, 2022, as Appl. No. 18/084,106.
Application 18/084,106 is a continuation of application No. 17/366,271, filed on Jul. 2, 2021, granted, now 11,563,675.
Claims priority of application No. 202111021859 (IN), filed on May 14, 2021.
Prior Publication US 2023/0120019 A1, Apr. 20, 2023
Int. Cl. H04W 74/08 (2024.01); H04L 12/46 (2006.01); H04L 45/00 (2022.01); H04L 45/50 (2022.01); H04W 72/04 (2023.01); H04W 76/14 (2018.01)
CPC H04L 45/507 (2013.01) [H04L 12/4641 (2013.01); H04L 45/66 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A node, in a first network, comprising circuitry configured to:
determine whether a next hop as decided by Border Gateway Protocol (BGP) utilizing a BGP Path Selection Algorithm is an anycast prefix to a Route Reflector (RR) interconnecting the first network with a second network;
responsive to the next hop being the anycast prefix to the RR, identify a non-anycast loopback IP address of the RR associated with the determined anycast prefix, and create a tunnel defining an on-demand tunnel path with a destination based on the anycast prefix, wherein the on-demand tunnel path is pinned to an upstream node directly connected to the RR via the identified non-anycast loopback IP address; and
utilize the tunnel for traffic having the next hop as the anycast prefix to the RR.