| US 7,558,276 B2 | ||
| System and method for retrieving computed paths from a path computation element using a path key | ||
| Jean-Philippe Vasseur, Dunstable, Mass. (US); and Richard Bradford, Westford, Mass. (US) | ||
| Assigned to Cisco Technology, Inc., San Jose, Calif. (US) | ||
| Filed on Nov. 05, 2004, as Appl. No. 10/982,641. | ||
| Prior Publication US 2006/0098657 A1, May 11, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04L 12/28 (2006.01) | ||
| U.S. Cl. 370—401 [370/248; 709/238; 709/249] | 25 Claims |
| 7. A method for retrieving computed path segments across one or more domains of a computer network in accordance with a stateful
path computation element (PCE) model, the method comprising the steps of:
receiving a response to a path computation request at a first network interface, the response including a path key and a computed
path containing compressed path descriptions of the computed path segment;
generating a path reservation message, the path reservation message including the path key and an ID of a PCE caching a computed
path segment of the computed path and its associated path key; and
transmitting the path reservation message via the first or a second network interface to certain receiving nodes along the
path described by the computed path.
|