| 摘要 |
<p>A method, device and system for establishing a bi-directional label switched path are provided. The method inculdes: if the source node hasn't available forward LSP, the source node establishes directly the forward LSP; if the source node hasn't available backward LSP, the source node informs the sink node by peer to peer to establish the backward LSP; the sink node establishes the backward LSP. According to the said method,device and system, existent forward LSP and/or backward LSP can be utilized to provide bi-directional services, so as to improve the utility of network resources; the transmission of control message by peer to peer mitigates the processing burden of the middle nodes; and the flexibility of providing bi-directional services is improved because of the independence of forward LSP and backward LSP.</p> |
