Flow engineering tunnel based data packet transmitting system

Abstract

The core idea of a method for transferring a data message on a Multi-Protocol Label Switching Traffic Engineering (MPLS TE) tunnel and a node device is to determine a switching node needed to switch the MPLS TE tunnel, to set routing forward information by which the different MPLS TE tunnels switch the tunnels at the switching node, wherein the switching node switches and transmits the data message in the different MPLS TE tunnels according to the routing forward information. By use of the invention, the sum of the whole network edge band width resource is higher than the band width resource in the core of network, the network resource is converged layer by layer, the problem of N square amount of the tunnels is effectively avoided, and a pressure on the network core node caused by a great deal of tunnels and a state renewing pressure of Resource ReSerVation Protocol-Traffic Engineering (RSVP-TE) are alleviated; the method for setting up the route forwarding information for switching the MPLS TE tunnels is simple and easy to realize; thereby realizing the requirement for the network resource converged layer by layer, improving the utilization of the band width resource and the extensibility of network.

Description

technical field [0001] The invention relates to the technical field of traffic engineering, in particular to a data message transmission method and node equipment based on an MPLS TE tunnel. Background technique [0002] MPLS TE (Multiprotocol Label Switching Traffic Engineering) technology collects link bandwidth information of the entire network by extending the IGP protocol, and uses the CSPF (Constrained Shortest Path First) algorithm to calculate an end-to-end tunnel connection that meets certain constraints, such as By specifying bandwidth information, MPLS TE technology can calculate an end-to-end tunnel that meets the bandwidth requirements and service type requirements, and reserves bandwidth resources at nodes along the tunnel. In the case of tight resources, MPLS TE can seize the bandwidth resources of low-priority LSP tunnels to meet the needs of large-bandwidth LSPs or important users. At the same time, the FRR (fast rerouting) technology based on MPLS TE can r...

AI Technical Summary

Problems solved by technology

[0007] The MPLS TE tunnel provides an end-to-end constant bandwidth tunnel, which itself has no bandwidth convergence capability. If it is deployed on the entire network, then for a network, the sum of the bandwidth resources at the edge of the entire network is the same as the network at the core of the network. Resources are equivalent or close to each other, thus, cannot meet the needs of layer-by-layer convergence of network resources

Since MPLS TE tunnels are deployed end-to-end, as the number of network nodes increases, there will be a problem of the number of tunnels being N squared. For example, if there are 100 nodes in the entire network and only one tunnel is built between any two nodes, the The number of tunnels is approximately: 100×(100-1). If the protection tunnels of TE FRR are added, the number of tunnels in the entire network will increase a lot

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