WO2017036165A1

WO2017036165A1 - Link fault detection method and apparatus

Info

Publication number: WO2017036165A1
Application number: PCT/CN2016/081441
Authority: WO
Inventors: 周广腾
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-08-28
Filing date: 2016-05-09
Publication date: 2017-03-09
Also published as: CN106487696A; CN106487696B

Abstract

A link fault detection method comprises: establishing a link between two nodes based on a BMP; detecting a link fault of the link between the two nodes based on a BFD; and processing, based on the BMP, the link fault detected based on the BFD. A fault in a link of the BMP can be quickly sensed by means of the BFD, and the BMP is informed of the fault, such that the problem of incapability of enabling the BMP to quickly sense an abnormity when the abnormity occurs in the link of the BMP in the related art is resolved, thereby achieving the effect of enabling a BMP to quickly sense an abnormity.

Description

Link fault detection method and device

Technical field

The present application relates to, but is not limited to, the field of communications, and in particular, to a link fault detection method and apparatus.

Background technique

The Border Gateway Protocol (BGP) monitoring protocol (BGP Monitoring Protocol, BMP for short) draft-ietf-grow-bmp-07 defines the method for establishing BMP neighbors, but for some reason, the link An exception occurs, and how to make the BMP quickly perceive this abnormality. The BGP Monitoring Protocol draft-ietf-grow-bmp-07 and its related protocol standards are not described.

There is no solution to the problem that the BMP cannot quickly perceive the abnormality when the BMP link is abnormal in the related art.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a link fault detection method and device, which can solve the problem that the BMP cannot quickly perceive the abnormality when the BMP link is abnormal in the related art.

According to an aspect of the embodiments of the present invention, a link fault detection method includes: establishing a link between two nodes based on a Border Gateway Protocol Monitoring Protocol (BMP); and performing bidirectional forwarding detection (Bidirectional Forwarding Detection, referred to as A link failure of the link between the two nodes is detected for BFD; and the link failure detected based on the BFD is processed based on the BMP.

Optionally, after the establishing the link between the two nodes based on the BMP, the method further includes: detecting, between the two nodes, based on the BFD, according to the established link triggering The link of the link is faulty.

Optionally, detecting the chain of the link between the two nodes based on the BFD After the path is faulty, the method further includes: according to the detected link failure, triggering processing, according to the BMP, the link fault detected based on the BFD.

Optionally, processing, according to the BMP, the link fault detected by the BFD includes: determining whether the BMP session states of the two nodes are all closed DOWN; if the determination result is yes, Reestablishing a link between the two nodes based on the BMP.

Optionally, after determining whether the link fault is the path fault between the two nodes, the method further includes: if the determination result is no, the BMP of the two nodes The session state is updated to turn off DOWN.

According to another aspect of the present invention, a link fault detecting apparatus is provided, including: an establishing module, configured to: establish a link between two nodes based on a Border Gateway Protocol Monitoring Protocol (BMP); and a detecting module And configured to: detect a link failure of the link between the two nodes based on the bidirectional transceiving detection (BFD); and the processing module is configured to: based on the BMP, the chain detected based on the BFD The road fault is processed.

Optionally, the foregoing apparatus further includes: a first triggering module, configured to: after the establishing module establishes the link between the two nodes based on the BMP, according to the established link triggering manner The detecting module detects a link failure of the link between the two nodes based on the BFD.

Optionally, the foregoing apparatus further includes: a second triggering module, configured to: after the detecting module detects the link fault of the link between the two nodes based on the BFD, according to the detecting And the link fault that is triggered, the processing module is triggered to process the link fault detected based on the BFD based on the BMP.

Optionally, the processing module includes: a determining unit, configured to: determine whether the BMP session states of the two nodes are both closed DOWN; and the reconstructing unit is configured to: if the determination result is yes, based on the The BMP re-establishes the link between the two nodes.

Optionally, the processing module further includes: an updating unit, configured to: after the determining unit determines whether the BMP session states of the two nodes are both closed DOWN, and if the determination result is negative, The status of both nodes is updated to turn off DOWN.

The embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented when the computer executable instructions are executed.

According to the embodiment of the present invention, the link between the two nodes is established based on the BMP, and the link fault of the link between the two nodes is detected based on the BFD, and the BMP is detected based on the BFD. The method for processing the link fault can be quickly detected by the BFD session and notified to the BMP, and the problem that the BMP cannot quickly sense the abnormality when the BMP link is abnormal in the related art is solved. In turn, the BMP is quickly perceived to be abnormal.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings described herein are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

1 is a flowchart of a link failure detecting method according to an embodiment of the present invention;

2 is a block diagram showing the structure of a link failure detecting apparatus according to an embodiment of the present invention;

3 is a block diagram 1 of an optional structure of a link failure detecting apparatus according to an embodiment of the present invention;

4 is a block diagram 2 of an optional structure of a link failure detecting apparatus according to an embodiment of the present invention;

FIG. 5 is a structural block diagram 1 of a processing module 26 in a link failure detecting apparatus according to an embodiment of the present invention;

6 is a structural block diagram 2 of a processing module 26 in a link failure detecting apparatus according to an embodiment of the present invention;

7 is a schematic diagram of a BMP link and a BFD session in a link fault detection method according to an embodiment of the present invention;

8 is a flowchart of processing when a BMP link of a link failure detecting method fails in accordance with an embodiment of the present invention;

Figure 9 is a schematic diagram of a BMP link failure;

10 is a schematic flowchart of a BMP link fault processing process of a link fault detection method according to an embodiment of the present invention;

11 is a schematic diagram of a BMP establishing link according to an embodiment of the present invention.

Embodiments of the invention

The present application will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or order.

A link fault detection method is provided in this embodiment. FIG. 1 is a flowchart of a link fault detection method according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps:

Step S102, establishing a link between two nodes based on the BMP;

Step S104, detecting a link failure of the link between the two nodes based on the BFD;

Step S106: Process the link fault detected based on the BFD based on the BMP.

Among them, BFD is a network protocol for detecting faults between two forwarding points, which is described in detail in standard RFC5880.

BFD establishes a session on the two devices to monitor the bidirectional forwarding path between the two devices. It serves the upper layer protocol, such as Mutil-Protocol Label Switching (MPLS) and Open Shortest Path First (Open). Shortest Path First (referred to as OSPF), Intermediate System-to-Intermediate System (IS-IS). The BFD itself does not discover the mechanism. Instead, it is notified by the upper layer protocol of the service that it should establish a session. If the BFD control packet is not received within the detection time after the session is established, the BFD control packet is considered to be faulty. The protocol and the upper layer protocol are processed accordingly.

In this embodiment, the BMP is configured as the upper layer protocol of the BFD and the BFD is deployed on the BMP link. The BFD can quickly detect the fault of the BMP link and notify the BMP of the fault. In the technology, when the BMP link is abnormal, the BMP cannot quickly perceive the abnormality, thereby achieving the effect of quickly sensing the abnormality of the BMP.

In an optional embodiment, after step S102, the method may further include: triggering, based on the established link, a link failure of the link between the two nodes based on the BFD. For example, after establishing After the BMP link is sent, the BMP can send a message to the BFD session, or the BMP session can be set to ON. This triggers the BFD to detect the link fault of the BMP link between the two nodes.

In an optional embodiment, after the step S104, the method may further include: triggering, according to the detected link fault, the BMP-based detection of the link fault based on the BFD. For example, after detecting a link fault, the message may be sent to the BMP by the BFD, or by changing the node status of the two nodes to the DOWN state, or by setting the session state of the BFD session to DOWN. Therefore, the BMP detects the link fault detected based on the BFD.

In an optional embodiment, step S106 can be implemented by: determining whether the BMP session states of the two nodes are both closed DOWN; if the determination result is yes, re-establishing the two nodes based on the BMP The link between. In the related art, if a node failure occurs and only one node fails, that is, when one node has a node status of UP and another node has a node status of DOWN, the BMP protocol has no way to cancel the abnormality. By relying on manual intervention, the node status of both nodes is DOWN. In this embodiment, it is first determined whether the BMP session state of the two nodes where the link failure occurs is DOWN, and then, if the determination result is yes, the path failure of the generated BMP link is processed, which is efficient and fast. Save manpower.

Optionally, in another optional embodiment, if it is determined that the BMP session states of the two nodes are not all in the state of turning off the DOWN, the step S106 further includes: if the determination result is no, the The BMP session status of both nodes is updated to turn off DOWN. In this way, in the optional embodiment, the node states of the two nodes can be updated to DOWN without manual intervention, and automatic processing based on the BMP for the node failure is implemented.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM, including a number of instructions to make a terminal device (can be a mobile phone, a computer, The server, or network device, etc.) performs the methods described in various embodiments of the present application.

In the embodiment, a link fault detecting device is provided, which is used to implement the foregoing embodiments and optional embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the devices described in the following embodiments are optionally implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a block diagram showing the structure of a link failure detecting apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes an establishing module 22, a detecting module 24, and a processing module 26. The apparatus will be described below.

The establishing module 22 is configured to: establish a link between two nodes based on the BMP;

The detecting module 24 is connected to the establishing module 22, and is configured to: detect a link failure of the link between the two nodes based on the BFD;

The processing module 26 is connected to the detecting module 24 and configured to: process the link fault detected based on the BFD based on the BMP.

3 is a block diagram of an optional structure of a link fault detecting apparatus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes a first triggering module 32, in addition to all the modules shown in FIG. The device will be described.

The first triggering module 32 is connected to the establishing module 22 and the detecting module 24, and is configured to: after the establishing module 22 establishes the link between the two nodes based on the BMP, according to the established link trigger detecting module 24 detecting the BFD based on the BFD The link of the link between the two nodes is faulty.

4 is a block diagram 2 of an optional structure of a link fault detecting apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes a second triggering module 42 in addition to all the modules shown in FIG. The device will be described.

The second triggering module 42 is connected to the detecting module 24 and the processing module 26, and is configured to: after detecting, by the detecting module 24, the link fault of the link between the two nodes based on the BFD, according to the detected link fault, The trigger processing module 26 processes the link fault detected based on the BFD based on the BMP.

FIG. 5 is a structural block diagram of a processing module 26 in a link failure detecting apparatus according to an embodiment of the present invention. First, as shown in FIG. 5, the processing module 26 includes a determining unit 52 and a reconstructing unit 54, which will be described below.

The determining unit 52 is configured to: determine whether the BMP session states of the two nodes are all closed DOWN;

The reconstruction unit 54, connected to the determination unit 52, is configured to re-establish the link between the two nodes based on the BMP in the case where the determination result of the determination unit 52 is YES.

FIG. 5 is merely an exemplary illustration, which may also be an example of processing module 26 in an apparatus as shown in FIG. 3, FIG. 4, or a combination thereof.

FIG. 6 is a block diagram showing the structure of the processing module 26 in the link fault detecting apparatus according to the embodiment of the present invention. As shown in FIG. 6, the processing module 26 includes an update unit 62, in addition to all the units shown in FIG. The processing module 26 will be described.

The updating unit 62 is connected to the judging unit 52, and is configured to: after the judging unit 52 judges whether the BMP session states of the two nodes are both closed DOWN, and if the judgment result of the judging unit 52 is NO, The status of each node is updated to turn off DOWN.

The embodiments of the present invention are exemplified below.

On a link that requires BMP to establish a link, a BFD protocol is set up to detect packets. This is referred to as the fast detection mechanism. In addition to BFD, other detection mechanisms can be used. The "fast detection mechanism" is associated with the upper-layer protocol BMP. When the BMP session is UP, the BMP session neighbor information is told to the "fast detection mechanism". The "fast detection mechanism" then establishes a neighbor relationship based on this information and performs a fast detection mechanism session. If there are multiple links between the two endpoints of a BMP session, a "fast detection mechanism" session can be established for each link.

The "fast detection mechanism" detects between the network nodes that establish two sessions (that is, the BMP session and the fast detection mechanism session); if the link failure occurs, the "fast detection mechanism" neighbor is removed, and the upper layer protocol BMP is immediately notified. The upper layer protocol BMP will immediately switch accordingly, that is, convert the state to DOWN; then re-initiate the chain building again.

The embodiment of the invention provides a method for quickly detecting a link abnormality of a BMP session that needs to be established. The method does not require manual intervention and is convenient to operate, and can quickly restore the link establishment in a short time to ensure timely BMP packets. Sent to the server.

FIG. 7 is a schematic diagram of a BMP link and a BFD session in a link fault detection method according to an embodiment of the present invention. As shown in FIG. 7, when the BMP link and the BFD session are working normally, the following steps are included:

Step S702, based on the BMP, initiate a connection between two nodes according to a normal process, and establish a link and a neighbor relationship between the two nodes;

Step S704, the neighbor relationship is established based on the BMP, that is, when the BMP session state is UP, the related information of the neighbor relationship of the two nodes is notified to the BFD;

In step S706, the BFD establishes a BFD neighbor relationship according to the information about the neighbor relationship of the two nodes, and performs link detection on the link between the two nodes that establish the BFD neighbor relationship and the session.

FIG. 8 is a flowchart of processing when a BMP link fails in a link fault detection method according to an embodiment of the present invention. As shown in FIG. 8, when a BMP link fails, the following steps are included:

Step S802, the links of the two nodes are faulty;

Step S804: The BFD detects that there is a link fault between the two nodes, and removes the BFD neighbor relationship.

Step S806, the BFD notifies that the local BMP link is faulty, and the fault causes the BFD neighbor to be unreachable.

Step S808: The BMP changes the BMP session state to DOWN according to the related fault information received from the BFD, and performs corresponding processing.

This ensures that the BMP session can quickly detect the link anomaly and handle it accordingly.

Figure 9 is a schematic diagram of a BMP link failure. As shown in Figure 9, the BMP does not have its own keep-alive message according to the BGP Monitoring Protocol draft-ietf-grow-bmp-07 and its related protocol standards. When the link is faulty, if the BMP session is changed from UP to DOWN, the corresponding information may be discarded due to the link failure. The status of the BMP session is abnormal, that is, the state of one end is UP and the other end is DOWN. At this time, the end that keeps the node state UP is no longer receiving the BMP link establishment request. At this time, the BMP protocol has no way to solve this abnormality. It requires manual intervention to make the state of both ends of the BMP session DOWN.

It should be pointed out that the two ends of the link fault can be one end as shown in Figure 9, and the other end. The end is a server, and both ends can be nodes.

FIG. 10 is a schematic diagram of a BMP link fault processing process according to a link fault detection method according to an embodiment of the present invention. As shown in FIG. 10, BFD is configured on two network nodes of a BMP session, and BMP is associated, and BFD detects link fault. After that, the BMP will be notified to convert the BMP session state with the status UP to DOWN; then, the BMP chain-building process is initiated according to the normal process, as shown in FIG.

In the case of a link abnormality, the BMP session can quickly detect the link abnormality, correctly and quickly establish a BMP connection, improve efficiency, and reduce manual intervention.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

The embodiment of the invention further provides a computer readable storage medium. Optionally, in the embodiment, the computer readable storage medium may be configured to store program code for performing the following steps:

Step S1, establishing a link between two nodes based on the BMP;

Step S2, detecting a link failure of the link between the two nodes based on the BFD;

Step S3: The BMP detects the link fault detected based on the BMP.

Optionally, in this embodiment, the computer readable storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (Random Access Memory). A variety of media that can store program code, such as RAM), removable hard drives, disks, or optical disks.

Optionally, in the embodiment, the processor performs the above steps S1 to S3 according to the program code stored in the computer readable storage medium.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

Those skilled in the art will appreciate that the various modules or steps of the present application described above may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices. Alternatively, they may be executed by a computing device Implemented so that they can be stored in a storage device by a computing device, and in some cases, the steps shown or described may be performed in an order different than that herein, or separately The integrated circuit modules are implemented by making a plurality of modules or steps of them into a single integrated circuit module. Thus, the application is not limited to any particular combination of hardware and software.

The above description is only an optional embodiment of the present application, and is not intended to limit the present application, and various changes and modifications may be made to the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application are intended to be included within the scope of the present application.

Industrial applicability

The embodiment of the present invention provides a link fault detection method and device. The BFD can quickly detect the faults on the BMP link and notify the BMP. The BMP link cannot be quickly perceived when the BMP link is abnormal. The abnormal problem, in turn, achieves the effect of making the BMP quickly perceive anomalies.

Claims

A link fault detection method includes:

Establishing a link between two nodes based on the Border Gateway Protocol Monitoring Protocol BMP;

Detection of a link failure of a link between the two nodes by BFD based on two-way transceiving;

And processing, according to the BMP, the link fault detected based on the BFD.
The method of claim 1, after the establishing the link between the two nodes based on the BMP, the method further comprises:

A link failure detecting a link between the two nodes based on the BFD is triggered according to the established link.
The method of claim 1, after the detecting the link failure of the link between the two nodes based on the BFD, the method further comprises:

And detecting, according to the detected link fault, the link fault detected by the BFD based on the BMP.
The method according to any one of claims 1 to 3, wherein the processing, based on the BMP, the link failure detected based on the BFD, comprises:

Determining whether the BMP session status of the two nodes is off DOWN;

In the case where the determination result is YES, the link between the two nodes is re-established based on the BMP.
The method of claim 4, after determining whether the BMP session states of the two nodes are both DOWN, the method further includes:

If the judgment result is no, the BMP session states of the two nodes are all updated to be off DOWN.
A link failure detecting device includes:

Establish a module, set to: establish a link between two nodes based on the Border Gateway Protocol Monitoring Protocol BMP;

The detecting module is configured to: detect, according to the bidirectional transceiver, the link fault of the link between the two nodes by the BFD;

The processing module is configured to: process the link fault detected based on the BFD based on the BMP.
The apparatus of claim 6 further comprising:

a first triggering module, configured to: after the establishing module establishes the link between the two nodes based on the BMP, triggering, according to the established link, the detecting module to be based on the BFD detection A link failure of a link between two nodes.
The apparatus of claim 6 further comprising:

a second triggering module, configured to: after the detecting module detects the link fault of the link between the two nodes based on the BFD, triggering according to the detected link fault The processing module processes the link fault detected based on the BFD based on the BMP.
The apparatus according to any one of claims 6 to 8, wherein the processing module comprises:

a determining unit, configured to determine whether the BMP session states of the two nodes are all closed DOWN;

The reconstruction unit is configured to: when the determination result is yes, re-establish the link between the two nodes based on the BMP.
The apparatus of claim 9, wherein the processing module further comprises:

And an update unit, configured to: after the determining unit determines whether the BMP session states of the two nodes are both closed DOWN, and if the determination result is no, update the status of the two nodes to be closed. DOWN.