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A device, system and method for flow-based loopback detection

A loopback detection and loopback technology, applied in the field of communication, can solve problems such as inability to apply equal-cost multi-path, inability to support loopback message transmission paths, and loopback response message transmission paths.

Active Publication Date: 2018-05-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The loopback detection function defined by the currently released IEEE 802.1ag standard is only applicable to the situation where there is only one Ethernet transmission path between the two maintenance points running this function, and cannot be applied to the situation where there is an equivalent network between the two maintenance points. The case of multipath
A loopback detection scheme in the related art can be applied to the situation where there are equal-cost multipaths between two maintenance points, but this scheme has certain limitations in practical application, that is, it can only support loopback message transmission paths The loopback detection application that shares the transmission path with the loopback response message cannot support the loopback detection that the loopback message transmission path and the loopback response message transmission path do not share the same path, and at the same time require the loopback response message to follow a specific reverse transmission path application

Method used

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  • A device, system and method for flow-based loopback detection
  • A device, system and method for flow-based loopback detection
  • A device, system and method for flow-based loopback detection

Examples

Experimental program
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Embodiment 1

[0057] This embodiment provides a flow-based source maintenance endpoint for loopback detection, such as figure 2 As shown, it includes a first sending module, a first receiving module and a judging module;

[0058] The first sending module is configured to send a loopback message to the destination maintenance point, which carries the flow identifier corresponding to the selected forward transmission path and the flow information indicating the selected reverse transmission path;

[0059] The flow information can be encapsulated in the structure of TLV (Type / type, Length / length, Value / value), and the flow information can be a direct flow identifier. At this time, the type field indicates that the type of the TLV is a flow identifier, and the length field is assigned a value It is fixed at 0x0002, indicating that the length of the value field of the flow information (namely, the flow identifier) ​​is 2 bytes (16 bits); the flow information can also be other flow information o...

Embodiment 2

[0065] This embodiment provides a purpose maintenance point for flow-based loopback detection, such as image 3 As shown, it includes a second receiving module and a second sending module;

[0066] The second receiving module is configured to receive the loopback message sent by the source maintenance endpoint;

[0067] The second sending module is configured to send a loopback response message to the source maintenance endpoint, which at least carries the flow identifier corresponding to the reverse transmission path; when the received flow information is not a direct flow identifier but other information obtained by the destination maintenance point When receiving the flow information, the second sending module also carries the flow information copied from the loopback message in the loopback response message indicating the flow identifier of the reverse transmission path.

[0068] System embodiment

[0069] This embodiment provides a flow-based loopback detection system, ...

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Abstract

The present invention provides a device, system and method for flow-based loopback detection. The method includes: a source maintenance endpoint sends a loopback message to a destination maintenance point, which carries flow information indicating a reverse transmission path; the destination maintenance point It is the destination maintenance endpoint or the destination maintenance intermediate point; after the source maintenance endpoint receives the loopback response message returned by the destination maintenance point, according to the flow identifier or flow information in the loopback response message and the loopback response message Other preset fields in the , to determine whether the loopback detection is successful. By adopting the scheme of the present invention, a loopback detection is performed on a specific path among multiple forward equivalent paths and a specific path among multiple reverse equivalent paths, thereby supporting the existence of multiple equivalent paths between two maintenance points. The application scenario of the path can be applicable to the situation that the forward transmission path and the reverse transmission path share or do not share the same path at the same time.

Description

technical field [0001] The present invention relates to the technical field of communications, and in particular to a flow-based loopback detection device, system and method. Background technique [0002] In the current Ethernet, the standard organization Institute of Electrical and Electronics Engineers (IEEE for short) has formulated a working mechanism of Ethernet operation, administration and maintenance (OAM for short), and It was officially released as the 802.1ag standard in 2007. [0003] The IEEE 802.1ag standard defines the logical entity of the OAM function in the Ethernet, including the Maintenance End Point (MEP) located at both ends of the Ethernet transmission path, and the Maintenance Intermediate Point (Maintenance Intermediate Point, MEP) located in the middle of the Ethernet transmission path. Abbreviated as MIP). Wherein, the maintenance end point and the maintenance intermediate point are collectively referred to as a maintenance point (Maintenance Poi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26H04L12/24
CPCH04L1/243
Inventor 肖敏魏月华喻敬海
Owner ZTE CORP