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:
May. 03, 2011
Filed:
Jan. 05, 2009
Donnie Savage, Raleigh, NC (US);
Alvaro Retana, Raleigh, NC (US);
Russ White, Holly Springs, NC (US);
Donnie Savage, Raleigh, NC (US);
Alvaro Retana, Raleigh, NC (US);
Russ White, Holly Springs, NC (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
In one embodiment, a method includes identifying at a node, a destination for which a primary path is defined between the node and the destination, transmitting a request message to a neighbor node for routing information for a backup path between the node and the destination, receiving a reply message containing an address identifying the backup path, and building a backup tunnel to the address. The request message includes at least one node identified as a node to be avoided in the backup path and a request cost. An apparatus for building backup tunnels is also disclosed.