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A label distribution method, device and system

An allocation method and technology of allocation method, applied in the field of communication, can solve the problem of large consumption of label resources, and achieve the effect of saving label resources and flexible application.

Active Publication Date: 2016-05-25
XFUSION DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the defect of large consumption of tag resources in the prior art in CSC scenarios, cross-domain OptionB scenarios, and cross-domain OptionC scenarios, the present invention provides a tag allocation method, device and system

Method used

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  • A label distribution method, device and system
  • A label distribution method, device and system
  • A label distribution method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] like figure 1 As shown, this embodiment provides a label assignment method, which includes the following steps:

[0036] 101: Match the characteristics of the route according to the matching condition to obtain a matching result. The matching condition includes: whether the characteristic of the route is a specified characteristic and / or whether the characteristics of multiple routes are the same.

[0037] Specifically, the characteristics of the aforementioned route include: route prefix, route mask length, BGP route attribute and route VPN label.

[0038] Correspondingly, the foregoing matching conditions include: whether the length of the route mask is a specified length, whether the route prefix is ​​a specified route prefix, whether the VPN labels of multiple routes are the same, and whether the next hops of multiple routes are the same or a combination of several.

[0039] 102: Select a corresponding label assignment method for the route according to the matchin...

Embodiment 2

[0043] This embodiment uses a CSC scenario as an example to illustrate the label allocation method in the embodiment of the present invention.

[0044] The CSC scenario refers to such a networking model: in addition to directly providing VPN services to customers, some large operators will also package some network resources to some small operators for operation. That is to say, BGP / MPLSVPN services provide The user of the provider may also be a service provider, in this case, the former is called the first-level operator, and the latter is called the second-level operator.

[0045] like Figure 2a As shown, the operator corresponding to AS (Autonomous System, autonomous system): 200 is a first-level operator, and the operator corresponding to AS: 100 is a second-level operator. The CE of the first-level operator, such as CE1, only advertises the internal routes of the second-level operator to the PE of the first-level operator, such as PE1, but does not publish the routes of...

Embodiment 3

[0059] Such as Figure 3a As shown, this embodiment takes the cross-domain VPNOptionC scenario as an example to illustrate the label allocation method of the present invention. In this scenario, the ASBR does not maintain or advertise VPN-IPv4 routes. PEs in different ASs, such as AS:100 and AS:200 in the figure, are between RR-1 (Route Reflector, route reflector) and RR-2. Establish a Multihop EBGP connection between them, and directly exchange VPN-IPv4 routes. ASBRs advertise IPv4 label routes to PE devices in their respective ASs through MP-IBGP (Multi-Protocol internal BGP, multi-protocol internal border gateway protocol), and will reach the AS. The IPv4 label route of the inner PE device is notified to its ASBR peer in the peer AS. The purpose of publishing IPv4 labeled routes is to bond the tunnels in their respective domains together to form an end-to-end tunnel between PE devices in different AS domains, such as PE2 and PE4.

[0060] Since the ASBR does not maintain ...

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Abstract

Embodiments of the present invention provide a label allocation method and device, which belong to the communication field. The method includes: matching the characteristics of the route according to the matching condition to obtain a matching result, the matching condition includes: whether the characteristic of the route is a specified characteristic and / or whether the characteristics of multiple routes are the same; and according to the matching result Select a corresponding label allocation mode for the route. The device includes: a matching module and an execution module. The present invention selects a corresponding label allocation mode by matching the characteristics of the route, can effectively save label resources, and is conducive to flexibly adding new label allocation modes according to the requirements of network deployment scenarios.

Description

technical field [0001] The present invention relates to the communication field, in particular to a label allocation method, device and system. Background technique [0002] At present, BGP (Border Gateway Protocol, border gateway protocol) / MPLS (Multiprotocol Label Switch, multi-protocol label switching) VPN (Virtual Private Network, virtual private network) technology has become mature and stable, and its application is becoming more and more extensive. In this technology, data is grouped and forwarded according to labels, which involves label allocation methods. There are two existing label assignment methods: [0003] First, a route-based label distribution method, which is to assign a different label to each route learned from a CE (Customer Edge, user edge) router on a PE (Provider Edge, provider edge) router. [0004] Second, a VPN-based label distribution method, which is to assign the same label to all routes within a VPN. [0005] In the process of realizing the...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L45/50
CPCH04L45/50
Inventor 孙春霞张栋
Owner XFUSION DIGITAL TECH CO LTD
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