Patent ID: 6895008
Filing Date: 2005-05-17
Classification: H04L

Abstract:
1. A label switching router placed at an end of an LSP set by using CRLDP comprising: a bidirectional LSP setup accepting portion for accepting an external bidirectional LSP setup request, a bidirectional LSP setup TLV preparing portion for preparing a bidirectional LSP setup TLV included in a bidirectional setup label request message transmitted in an up direction to a label switching router placed at another end of the LSP based on the bidirectional LSP setup request, a bidirectional LSP setup TLV analyzer for analyzing the bidirectional LSP setup TLV in the message when the message is received from the label switching router at the other end, a bidirectional LSP processor for performing an LSP setup request in a down direction as opposed to the up direction based on the analyzed result by the bidirectional LSP setup TLV analyzer, and an explicit route preparing portion for preparing an explicit route on which a router to be relayed in the down direction is prescribed, based on an explicit route preparing request from the bidirectional LSP processor, based on the CRLDP, and for notifying the prepared route to the bidirectional LSP processor.