Message processing method and label switching router

A label switching path and label switching technology, applied in the fields of methods and routers, and packet processing, can solve the problem of not being able to know the LSRs that IP packets pass through when forwarding

Active Publication Date: 2015-10-14
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides a message processing method and a label switching router

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  • Message processing method and label switching router
  • Message processing method and label switching router
  • Message processing method and label switching router

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Embodiment Construction

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] figure 1 The corresponding embodiment describes the packet processing method provided by the embodiment of the present invention from the perspective of the Ingress LSR. Such as figure 1 As shown, a method for message processing provided by the embodiment of the present invention, the method is applicable to the MPLS network of SR, and the method includes:

[...

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Abstract

The present invention provides a message processing method and a label switching router, so as to solve the problem that a current egress label switching router (LSR) can not learn about the LSRs passed by an IP message forwarded in a multi protocol label switching (MPLS) network. The method is applicable to the MPLS network of segment routing (SR) and includes the following steps: an ingress LSR of a label switching path (LSP) tunnel receives an interior gateway protocol (IGP) based notification message transmitted by an egress LSR of the LSP tunnel, wherein the notification message is used to notify the ingress LSR that the egress LSR has the capability of identifying a label history stack; after the notification message is received, an MPLS label stack is inserted into the IP message which enters into the LSP tunnel and an MPLS message is created, wherein, from the top to the bottom of the stack, the MPLS label stack includes: multiple segments, a label history identifier and a label history stack, wherein multiple segments are used to identify the LSRs passed in turn when the MPLS message is forwarded in the LSP tunnel, the label history identifier is used to identify the label history stack included in the MPLS message, and the label history stack includes multiple segments; the MPLS message is transmitted to the egress LSR through the LSP tunnel.

Description

technical field [0001] The invention relates to communication technology, in particular to a message processing method and a router. Background technique [0002] In segment routing (full English name is Segment Routing, English abbreviation is SR) technology, the control plane adopts the interior gateway protocol (English full name is Interior Gateway Protocol, English abbreviation is IGP) based on the link state, such as: intermediate system to intermediate system (English full name is Intermediate System to Intermediate System, English abbreviation is IS-IS) protocol, Open Shortest Path First (English full name is Open Shortest Path First, English abbreviation is OSPF) protocol, to distribute label switching routers (English full name is Label Switching Router, the English abbreviation is LSR) Multi-Protocol Label Switching (English abbreviation is Multi Protocol Label Switching, English abbreviation is MPLS) label, the data plane forwards MPLS packets based on the label ...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L12/46H04L45/50
CPCH04L12/4633
Inventor 郑莲淑陈国义
Owner HUAWEI TECH CO LTD
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