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. 29, 2012
Filed:
Feb. 20, 2007
Jean-philippe Vasseur, Dunstable, MA (US);
Stefano Novello, Concord, MA (US);
Jean-Philippe Vasseur, Dunstable, MA (US);
Stefano Novello, Concord, MA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
In one embodiment, a routing node (e.g., a head-end node) determines a desire to route a selected tunnel (e.g., reroute), and computes a path for the selected tunnel. The routing node probes the path to discover information about tunnels that would be displaced by the selected tunnel if routed over the path (e.g., a number of tunnels), and correspondingly determines whether to establish the selected tunnel based on the information about the tunnels to be displaced. In another embodiment, intermediate nodes along the probed path of the selected tunnel may receive a probe (e.g., signaling message) requesting information about the tunnels that would be displaced by the selected tunnel. In response, each intermediate node inserts the information about the tunnels to be displaced at the intermediate node into the probe, and forwards the probe (e.g., toward the routing node initiating the probe).