US 12,355,655 B2
Forwarding packets in multi-regional large scale deployments with distributed gateways
Arun Kumar Srinivasan, Waterloo (CA); Navaneeth Krishnan Ramaswamy, Chennai (IN); Sumit Mundhra, Burnaby (CA); Saravanan Kandasamy, Coimbatore (IN); and Balaji Shanmugam, Bengaluru (IN)
Assigned to VMware LLC, Palo Alto, CA (US)
Filed by VMware LLC, Palo Alto, CA (US)
Filed on Aug. 16, 2023, as Appl. No. 18/234,376.
Prior Publication US 2025/0062979 A1, Feb. 20, 2025
Int. Cl. H04L 45/122 (2022.01); H04L 45/00 (2022.01)
CPC H04L 45/122 (2013.01) [H04L 45/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for forwarding packets through an SD-WAN (software-defined wide area network), the method comprising:
at a route reflector that advertises routes to facilitate forwarding of packets from a first region of the SD-WAN to a second region of the SD-WAN, and from the second region of the SD-WAN to the first region of the SD-WAN, said first region having a first hub router forwarding packets between a first set of edge routers of a first set of sites of the first region, and said second region having a second hub router for forwarding packets between a second set of edge routers of a second set of sites of the second region:
advertising, to the first set of edge routers in the first region, a first route that identifies the first hub router as a next hop for use in initiating communications with the second set of edge routers in the second region;
advertising, to the second set of edge routers in the second region, a second route that identifies the second hub router as a next hop for use in initiating communications with the first set of edge routers in the first region;
from the second hub router, receiving a notification that the second hub router has lost connectivity to a first edge router of the first set of edge routers of the first region; and
based on the notification, advertising to the second set of edge routers a third route that identifies the first hub router as a next-hop for initiating communications with the first edge router in the first region.