US 11,929,849 B1
Symmetric routing in software-defined networks
Satish Mahadevan, San Ramon, CA (US); Laxmikantha Reddy Ponnuru, San Ramon, CA (US); Samir Thoria, Saratoga, CA (US); Alfred Clarence Lindem, III, Cary, NC (US); and Arul Murugan Manickam, San Jose, CA (US)
Assigned to CISCO TECHNOLOGY, INC., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Mar. 28, 2023, as Appl. No. 18/127,507.
Int. Cl. H04L 12/46 (2006.01); H04L 45/18 (2022.01)
CPC H04L 12/462 (2013.01) [H04L 45/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, at a gateway node that facilitates communications between a first network and a second network, a gateway preference order associated with a route advertised by an edge node, the edge node associated with the first network;
determining, by the gateway node and based at least in part on the gateway preference order, that the gateway node is a more preferred gateway for the route than another gateway node;
converting, by the gateway node, the gateway preference order into a metric associated with an internet protocol (IP) routing protocol that is in use in the second network; and
distributing, by the gateway node, the route including the metric to the second network such that the gateway node is the more preferred gateway for return traffic of the route.