Patent ID: 11881986
Assignee: ARISTA NETWORKS, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A method for managing traffic flow between a first router and a second router coupled to each other via a first path containing a first set of one or more switches and via a second path containing a second set of one or more switches, the method comprising:
initiating, by the first router, bidirectional forwarding detection (BFD) on the first path by periodically sending messages for BFD from the first router to the second router via the first path and expecting reception of a corresponding response from the second router to each message in the sent messages;
detecting after the initiating, by the first router, that the corresponding response to a given message in the sent messages has not been received within a period of time, the corresponding response not being received within the period of time indicating that at least a portion of the first path has failed; and
in response to the detecting, updating one or more portions of network device hardware in the first router to redirect packets from the first router to the second router to take the second path instead of the first path.