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Label expanding method and label expanding device for multi-protocol label switching

A multi-protocol label and label extension technology, which is applied in the direction of data exchange network, data exchange through path configuration, digital transmission system, etc., can solve the problem of insufficient global label resources and achieve the effect of solving resource shortage

Active Publication Date: 2012-10-03
XINHUASAN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, this application provides an MPLS label extension method and device, which can solve the problem of insufficient resources faced by global labels

Method used

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  • Label expanding method and label expanding device for multi-protocol label switching
  • Label expanding method and label expanding device for multi-protocol label switching
  • Label expanding method and label expanding device for multi-protocol label switching

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the solutions of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0022] An MPLS label extension method is proposed in the embodiment of the present invention, which is applied to an MPLS network. The MPLS network includes multiple routers. The method for implementing MPLS label extension for any router is: The value range of a tag is divided in the tag value space, and each tag in the tag value range is used as a first-level instance-specific tag to represent a tag space. When an FEC with no tag is identified, the first Select an unassigned label in the label space of any label in the specific label of the level instance to allocate to the FEC, establish the mapping between the FEC and the allocated label, and use the inbound label mapping (ILM) for global label forwarding ) table to add the forwardi...

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PUM

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Abstract

The invention discloses a label expanding method based on MPLS (multi-protocol label switching), which comprises the following steps: dividing a value range in overall labels, wherein each label within the value range is set as a first stage example specific label for representing a label space; identifying an FEC and then distributing an undistributed label in the label space of the first stage example specific label; adding the label operation of the specific label in the overall labels as a popping label and reorienting the popping label in an ILM (information lifecycle management) list used for transmitting the first example specific label; and informing representation of the FEC and the label and the first stage example specific label affiliating the presentation to a reciprocal body. Based on the same inventive concept, the invention also provides a device, which can solve resource shortage problem faced by the overall labels.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a method and device for label extension of Multi-Protocol Label Switching. Background technique [0002] In traditional Layer 3 (Layer 3, L3) forwarding, each packet must analyze all the information in the L3 header when it passes through each router in the network. This information is used to look up the routing and forwarding table to obtain the next hop. Usually only the destination IP address in the packet header needs to be analyzed, but in some cases, other information is required. All in all, header analysis and complex lookups must be done independently on each device. [0003] Multi-protocol Label Switching (MPLS) forwarding only needs to analyze the L3 header once, and then map the L3 header to a fixed-length and unstructured label. This label represents a forwarding equivalence class (Forwarding Equivalence Class, FEC), no matter how big the diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L29/12H04L45/50
Inventor 叶金荣
Owner XINHUASAN INFORMATION TECH CO LTD
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