Method, system and device for establishing and removing cross-domain LSP (Label Switching Path)
A cross-domain, purpose-based technology, which is applied in the field of establishing and dismantling cross-domain label switching paths, can solve problems such as the inability to realize the seamless integration of AN and MPLS networks, the inability to establish cross-domain LSPs, and the inability to provide flexibly, so as to reduce construction and maintenance costs , improve user experience, and reduce complexity
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[0057] The implementation process of the method for establishing a cross-domain LSP in the present invention is as follows: Figure 4 As shown, the method includes:
[0058] Step 401: LER obtains the destination address corresponding to FEC;
[0059] Step 402: If the LER finds the longest matching route of the destination address locally, it sends a label REQUEST message of the FEC to the next-hop LSR corresponding to the longest matching route;
[0060] Before the LER queries the longest matching route of the destination address locally, if the exact matching route of the FEC destination address is found locally, the operation of establishing an LSP is performed according to the regulations of RFC5036.
[0061] Before the LER locally queries the longest matching route of the FEC destination address, it will check whether the local configuration allows the longest matching route for the FEC according to the regulations of RFC5283.
[0062] After sending the label request REQ...
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