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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

Inactive Publication Date: 2012-10-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

If end-to-end label distribution adopts DOD mode, although it can solve the problem of heavy LDP load in the aggregation domain, AN can only support static routing in order to reduce the complexity and construction and maintenance costs, and in order to reduce the load of IGP in the MPLS network. When the aggregation routing function is enabled, cross-domain LSPs cannot be established, and the seamless integration of AN and MPLS networks cannot be realized. Network operators and service providers cannot flexibly provide various services at suitable points in the network, which affects user experience

Method used

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  • Method, system and device for establishing and removing cross-domain LSP (Label Switching Path)
  • Method, system and device for establishing and removing cross-domain LSP (Label Switching Path)
  • Method, system and device for establishing and removing cross-domain LSP (Label Switching Path)

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Embodiment Construction

[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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Abstract

The invention discloses a method for establishing a cross-domain LSP (Label Switching Path). The method comprises the following steps: after a target address corresponding to a forwarding equivalence class FEC is obtained by a label edge router (LER), if a longest matching route of the target address is searched locally, transmitting label REQUEST information of FEC to a next hop of label switching router (LSR) corresponding to the longest matching route; after the label request REQUEST information of FEC is received by LSR, if a longest matching route of the target address of the FEC is searched locally, transmitting label REQUEST information of FEC to a next hop of LSR corresponding to the longest matching rout or transmitting label MAPPING information of FEC to LER or LSR for transmitting the label REQUEST information of FEC. The invention further discloses a system and a device for establishing the cross-domain LSP, and a method, a system and a device for removing the cross-domain LSP, by adopting the invention, the problem of incapability of establishing or removing the cross-domain LSP under a DOD (Downstream On Demand) label distribution mode by the conventional seamless MPLS (Multi-Protocol Label Switching) network end-to-end device.

Description

technical field [0001] The invention relates to the technical field of seamless multi-protocol label switching (MPLS), in particular to a method, system and equipment for establishing and dismantling a cross-domain label switching path (LSP) in a seamless MPLS network. Background technique [0002] Seamless (Seamless) Multi-Protocol Label Switching (MPLS, Multi-Protocol Label Switching) technology can ensure a unified control plane in the network access layer, convergence layer and core layer, it can guarantee fast detection of faults, and has network Convergence, redundancy protection, load balancing and other features meet the needs of home services, mobile backhaul (backhaul) and commercial services. [0003] Network operators and service providers can flexibly provide various services at any suitable point in the network. Take the application of seamless MPLS technology in Virtual Private Network (VPN, Virtual Private Network) as an example, such as figure 1 As shown, t...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/721
Inventor 祝沈财段方红
Owner ZTE CORP
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