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Method and equipment for establishing LSP (label switched path) in MPLS (multi-protocol label switching) network

A technology for establishing a method and equipment, applied in the field of communication, can solve the problem of consuming large software and hardware resources, and achieve the effect of reducing software and hardware resources and realizing MPLS label forwarding.

Active Publication Date: 2013-01-02
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the above implementation process, in the case of a large number of routes, a large number of LSPs need to be established, thus consuming a large amount of software and hardware resources

Method used

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  • Method and equipment for establishing LSP (label switched path) in MPLS (multi-protocol label switching) network
  • Method and equipment for establishing LSP (label switched path) in MPLS (multi-protocol label switching) network
  • Method and equipment for establishing LSP (label switched path) in MPLS (multi-protocol label switching) network

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Embodiment Construction

[0045] For the networking of the MPLS network, the OSPF (Open Shortest Path First) routing protocol is usually used in the MPLS domain to learn and advertise routes, such as figure 2 As shown in the schematic diagram of the MPLS network, after using OSPF for routing calculation (such as calculation using the SPF (Shortest Path First) algorithm), the network topology is as follows image 3 shown.

[0046] against image 3 In the shown network topology, IP network 2 and IP network 1 are hung under Egress LSR, so the paths from Ingress LSR to IP network 2 and IP network 1 are respectively: Ingress LSR->T1->T2->Egress LSR-> IP network 2 and Ingress LSR->T1->T2->Egress LSR->IP network 1; that is, the paths from Ingress LSR to IP network 2 and IP network 1 are the same in the MPLS domain, so the same path can be passed in the MPLS domain. LSPs for forwarding.

[0047] Based on the above findings, the embodiments of the present invention provide a method and device for establishi...

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Abstract

The invention discloses a method and equipment for establishing an LSP (label switched path) in an MPLS (multi-protocol label switching) network. The method comprises the following steps: ingress equipment is used for computing a route to obtain a loopback interface route of egress equipment corresponding to the computed route; if the computed route is not matched with the loopback interface route, the ingress equipment checks that whether a public network common tag corresponding to the egress equipment is recorded locally; and if yes, the ingress equipment establishes an LSP corresponding to the computed route through an LSP corresponding to the loopback interface route of the egress equipment. According to the method and the equipment, the resource consumed by the LSPs can be reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and equipment for establishing an LSP (Label Switched Path) in an MPLS (Multi-protocol Label Switching, multi-protocol label switching) network. Background technique [0002] Such as figure 1 As shown, it is a schematic diagram of the networking of the MPLS network. The constituent units of the MPLS network are LSRs (Label Switching Routers, Label Switching Routers), and the network formed by the LSRs is an MPLS domain; wherein, the MPLS network includes the following parts: (1) Ingress ( Ingress node), which is the entry LER (Label Edge Router, label edge router) of the message, which is responsible for adding labels to the messages entering the MPLS domain; (2) Transit (intermediate node), which is the LSR inside the MPLS domain, which is responsible for According to the label, the message is sent to the egress LER along the LSP formed by a series of LS...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L45/50
Inventor 赵昌峰吴玲
Owner NEW H3C TECH CO LTD
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