The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2017
Filed:
Mar. 24, 2014
Alvaro E. Retana, Raleigh, NC (US);
Alvaro E. Retana, Raleigh, NC (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
In one embodiment, non-eligible distance vector protocol paths are used as backup paths. In one embodiment, the distance vector protocol is Enhanced Interior Gateway Protocol (EIGRP) and unless a path is a feasible successor for a destination, the path is not eligible as a backup path. Therefore, if there is no feasible successor, there is no eligible backup path. One embodiment avoids an initial delay in finding a replacement path for traffic by determining and installing a non-eligible backup path (e.g., a path that is not a feasible successor) in one or more forwarding tables. In this manner, the router can immediately forward packets over this non-eligible backup path until, for example, forwarding in the network can converge in light of the primary path being no longer available.