Patent ID: 7436855
Filing Date: 2008-10-14
Classification: H04L

Abstract:
1. A method for establishing a path between a first node and a second node in a network in which said first node and said second node are in separate portions of said network, comprising the steps of: (a) determining, by said first node, a loose route for said path to said second node; (b) sending, by said first node to a third node, which is in a separate portion of said network than said first node and said second node, and is a part of said loose route, a path setup message that specifies said loose route and also specifies any network resources to exclude from said path; (c) determining, by said third node, a route from said third node to said second node wherein the determined route excludes said network resources to be excluded from said path; (d) modifying, by said third node, said path setup message by inserting said determined route therein; and (e) sending, by said third node, the modified path setup message to said second node, for completing establishment of said path.