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A method for establishing static label transmitting route

A label forwarding path, static technology, applied in the direction of store-and-forward switching systems, electrical components, transmission systems, etc., can solve the problems of non-conforming static binding, unintuitive configuration, inconvenient use, etc., and achieve intuitive configuration and information. The effect of tag merging and load sharing

Inactive Publication Date: 2005-11-23
HUAWEI TECH CO LTD
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Problems solved by technology

[0018] 2. After the network topology is changed, the cross-connection is still valid, which will cause packet forwarding errors;
[0020] 1. Since LSR (Label Switching Routing) uses the label distribution protocol to dynamically learn the labels used for label switching packets, the static binding of IPv4 prefixes and labels requires LDP support, so that it cannot exist independently from the MPLS signaling protocol;
[0021] 2. Static binding does not conform to the standard concept of cross-connect and MPLS, the configuration is not intuitive, and it is inconvenient to use

Method used

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  • A method for establishing static label transmitting route

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] The invention provides a method for establishing a static LSP, which adopts a configuration method. In a specific solution, the provided static configuration LSP configuration includes ingress node configuration, intermediate node configuration and egress node configuration. In a preferred embodiment of the present invention, the ingress node and the egress node refer to border label switching routers, and the intermediate nodes refer to label switching routers (LSRs).

[0043] 1. Static LSP configuration at the ingress node

[0044] To implement a static LSP, the following information needs to be configured on the ingress node:

[0045] ◆Ingress static LSP name

[0046] ◆FEC information (destination address and address mask)

[0047] ◆Next hop / outbound interface

[0048] ◆Out label

[0049] Static LSP configuration at the ingress node needs to implement...

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Abstract

This invention provides one method to establish static LSP, which is free of dynamic order agreement and totally depends on established LSP with alignment in MPLS regulation for usage and is suitable for network topology changes. This invention also provides one method to brush the above static LSP suitable for network alignment and topology changes.

Description

technical field [0001] The invention relates to a method for establishing a static label forwarding path (LSP), in particular to a method for establishing a static label forwarding path completely dependent on configuration. Background technique [0002] MPLS (Multiprotocol Label Switching) decides forwarding based on labels. A label is a fixed-length identifier that has local effect only on a one-hop link. What the label identifies is a group of packets called a Forwarding Equivalence Class (FEC). When an unlabeled packet enters an MPLS domain, the edge LSR will analyze the destination address carried in the packet header, classify the packet into a certain FEC, add the label corresponding to the FEC to the packet, and then jump to the next step send. The intermediate LSR maintains a mapping table of incoming labels, outgoing labels, and forwarding directions. When it receives a labeled packet, it uses the incoming label carried by the packet as an index, and retrieves t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L45/50
Inventor 李振斌
Owner HUAWEI TECH CO LTD
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