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Data messag transferring method based on multi-protocol label switching network

A multi-protocol label and data message technology, applied in the field of data message forwarding based on multi-protocol label switching network, can solve the problems of increasing system impact and reducing forwarding efficiency, so as to avoid performance degradation and reduce impact Effect

Inactive Publication Date: 2005-08-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above actually went through two queries. Generally speaking, it is inevitable to query the mapping table on the inbound interface, but an extra query is added on the outbound interface only due to the shape of the device, which reduces the forwarding efficiency and increases the impact on the system

Method used

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  • Data messag transferring method based on multi-protocol label switching network
  • Data messag transferring method based on multi-protocol label switching network
  • Data messag transferring method based on multi-protocol label switching network

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Embodiment Construction

[0015] The essence of the present invention is to design a token (Token), which is equivalent to the

[0016] The essence of the present invention is to design a token (Token), which is equivalent to a local token used for inter-board communication and is only valid locally. Token is unique for each interface, and it is used to locate NHLFE on the outgoing interface.

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] figure 1 It is an embodiment flowchart of the method of the present invention. according to figure 1 First, in step 1, the main control board of the multi-protocol label switching (MPLS) device assigns a token (TOKEN) array to the interface used for multi-protocol label switching on the interface board, which is used to manage the token value of the interface and assign the next hop token forwarding An array of entries (NHLEF) used to store next-hop tag-forwarding entries by tag valu...

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PUM

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Abstract

The invention discloses a data message transferring method based on multiple protocol tag exchange network. In the method, each interface is assigned a TOKEN array and a NHLEF array. During the setup of LSP, the TOKEN value is assigned to LSP, then storing the NHLEF corresponding to the LSP in the items whose NHLEF array subscript of the interface is TOKEN, at the same time, in the mapping from ILM and FEC to NHLEF, recording the value including TOKEN, when transferring the data message, searching the corresponding mapping of ILM or FEC to NHLEF on the interface board in which the input interface locates for the input message, sending the data message storing the TOKEN value to the interface board, finding the corresponding NHLEF directly in the output interface NHLEF array according to the interface board, finally exporting the data message through the NHLEF. The method by the invention can prevent the performance reduction when the interface board seeks the NHLEF table for the second time, thus reducing the influence to the system.

Description

technical field [0001] The invention relates to a forwarding method of data messages in a multi-protocol label switching (MPLS) network. Background technique [0002] In the MPLS network, when data packets enter the MPLS network, they are first classified into different forwarding equivalence classes (FEC, Forwarding Equivalence Class, forwarding equivalence class), and then these FECs are marked with the next hop forwarding items (NHLFE, Next Hop Label ForwardingEntry) to forward data packets by label switching. A path traversed by an FEC in the MPLS network, that is, a Label Switched Path (LSP, Label Switched Path), needs to establish a connection before MPLS forwarding, that is, establish an LSP. When an unlabeled data packet enters MPLS, that is, the entry node of LSP, it first finds the corresponding FEC, finds NHLFE through the mapping from FEC to NHLFE, performs label processing and forwarding according to NHLFE, and forwards the outgoing packet is already tagged. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L45/50H04Q3/00
Inventor 范宇吕鑫曹学贵樊迟
Owner HUAWEI TECH CO LTD