US 12,489,701 B2
Systems and methods to optimize routing in BGP (Border Gateway Protocol) networks
Narayan Padi, Cedar Knolls, NJ (US); Tzuu-Yi Wang, Newtown, PA (US); Harpreet Ahluwalia, Holmdel, NJ (US); Gagan Choudhury, Jackson, NJ (US); Aswatnarayan Raghuram, Morganville, NJ (US); Alvin C. Goddard, Kendall Park, NJ (US); Manu Thannickal, Basking Ridge, NJ (US); Lynn Rivera, Leesburg, VA (US); and Sheshashailavas Chinthakayala, Chesterfield, NJ (US)
Assigned to AT&T Intellectual Property I, L.P., Atlanta, GA (US)
Filed by AT&T Intellectual Property I, L.P., Atlanta, GA (US)
Filed on Feb. 15, 2022, as Appl. No. 17/672,320.
Prior Publication US 2023/0261967 A1, Aug. 17, 2023
Int. Cl. H04L 45/12 (2022.01); H04L 12/46 (2006.01); H04L 43/0817 (2022.01); H04L 43/0882 (2022.01); H04L 45/00 (2022.01); H04L 45/42 (2022.01); H04L 47/122 (2022.01)
CPC H04L 45/123 (2013.01) [H04L 12/4641 (2013.01); H04L 43/0817 (2013.01); H04L 43/0882 (2013.01); H04L 45/22 (2013.01); H04L 45/42 (2013.01); H04L 47/122 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device comprising:
a processing system including a processor; and
a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, the operations comprising:
detecting whether a bandwidth capacity loss occurs on a first link bundle connecting one or more first core routers of a core Interior Gateway Protocol (IGP) network with one or more first provider routers, resulting in a detected capacity loss, wherein communication between the one or more first core routers of the core IGP network and the one or more first provider routers utilizes a Border Gateway Protocol (BGP), wherein a second link bundle connects one or more second core routers of the core IGP network with one or more second provider routers, and wherein communication between the one or more second core routers of the core IGP network and the one or more second provider routers utilizes the BGP, wherein the detecting monitors capacity, traffic volume and traffic direction provided by telemetry information to detect the bandwidth capacity loss;
responsive to the detected capacity loss, automatically increasing an Accumulated IGP cost on the first link bundle associated with selected network traffic that was to be carried between the one or more first provider routers and the one or more first core routers of the core IGP network, wherein the selected network traffic will instead be re-directed for communication via the second link bundle; and
causing communication via the second link bundle of the selected network traffic, wherein the communication via the second link bundle of the selected network traffic is between the one or more second provider routers and the one or more second core routers of the core IGP network.