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Method and system of resiliency in cloud-delivered SD-WAN

  • US 10,523,539 B2
  • Filed: 09/11/2017
  • Issued: 12/31/2019
  • Est. Priority Date: 06/22/2017
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a first device at an edge of a branch first network;

    a second device operating as an access point to a second network; and

    at least two links between the first device and the second device, wherein (i) a tunnel is established on an active first link of the at least two links, (ii) no tunnel is established on a backup second link of the at least two links, and (iii) probe packets are used to monitor a state of the backup second link in order to ensure that the second link can become active when needed to replace the first link;

    wherein if the first link becomes inactive, a second tunnel is established on the second link and the second link becomes the active link.

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