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Label switching path (LSP) aggregation method

A label switching path and aggregation method technology, applied to the application of multi-protocol label switching in Ethernet, the field of label switching path aggregation, can solve problems such as inability to solve aggregation, limited range of reliability, etc., and achieve simple and reliable implementation sex enhancing effect

Inactive Publication Date: 2008-11-26
HUAWEI TECH CO LTD
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  • Claims
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Problems solved by technology

However, the disadvantages of link aggregation are: (1) Due to its architecture in IEEE 802.3, all the advantages of link aggregation can only be based on physical links, and cannot solve some problems based on logical links. , Aggregation in units of logical ports; (2) Since link aggregation occurs between ports of adjacent devices
Therefore, the reliability advantages achieved by link aggregation can only be limited between adjacent devices, so the scope of its reliability is relatively limited

Method used

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  • Label switching path (LSP) aggregation method
  • Label switching path (LSP) aggregation method
  • Label switching path (LSP) aggregation method

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Embodiment Construction

[0050] Specific embodiments of the present invention will be described below with reference to the accompanying drawings. The present invention is a label switching path aggregation method, which adds a layer of aggregation labels in the label stack of multi-protocol label switching (MPLS), so that there are at least two labels existing between the same source aggregation device and the same sink aggregation device The switched path (LSP) forms a label switched path (LSP) aggregation group; the source aggregation device selects a path in which a message is to be forwarded in the label switched path (LSP) aggregation group as an actual label switched path; The packet is forwarded to the sink aggregation device through the actual label switching path.

[0051] LSP aggregation implements the LSP aggregation function by adding an aggregation label (Aggregation Label) to the MPLS label stack. In the example above (as in figure 2 As shown), there are two different LSPs between P1...

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Abstract

A method for aggregation path of label switching includes adding a layer of aggregation label on MPLS label stack to form a label switching path aggregation set by at least two label switching paths of aggregation device with the same source and aggregation device with the same host , selecting path of message required to be retransmitted as actual label switching path from said aggregation set of label switching path by source aggregation device according to specific LSP selection algorithm and retransmitting message to host aggregation device through actual label switching path .

Description

technical field [0001] The present invention relates to network technology, in particular to the application of multi-protocol label switching (MPLS) in Ethernet, specifically a label switching path (LSP) aggregation method. Background technique [0002] At present, the application of MPLS in Ethernet has become more and more extensive. MPLS is a method of adding a label stack in the message, so that various messages can be exchanged through various labels in the router, thereby replacing the traditional packet forwarding by parsing IP. Because, in theory, the label stack can be nested infinitely, thus providing unlimited business support capabilities. This is where the charm of MPLS technology lies. [0003] The basic structure of an MPLS network is as follows: figure 1 shown. Before the service is transmitted, the routers in the MPLS network use the Label Distribution Protocol (LDP), the Restriction-Based Routing Label Distribution Protocol (CR-LDP), and the Resource R...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/28H04L29/06H04L45/50
Inventor 钟来军李振华江健
Owner HUAWEI TECH CO LTD
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