CN104780081B - A kind of network connectivity fai_lure detection device and method - Google Patents
A kind of network connectivity fai_lure detection device and method Download PDFInfo
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Abstract
The present invention discloses a kind of network connectivity fai_lure detection device and method, the device includes parsing module, control module and display module, wherein parsing module, for receiving and parsing the network diagnosis message broadcasted in network, the first control parameter carried in network diagnosis message is parsed, the first control parameter parsed is sent to control module；Control module generates control signal, control display module is shown according to the first control parameter according to the first control parameter received.The present invention discloses specific implementations, apparatus and method using the present invention can rapidly and efficiently investigate out network failure on the premise of hardly hardware cost is increased, which item or which section link failure can be quickly oriented on the premise of existing system operation is not influenced.
Description
Technical field
The invention belongs to network equipment failure detection technique fields, and in particular to a kind of network connectivity fai_lure detection device and
Method.
Background technology
Being currently based on the video monitoring system of IP network is just progressively becoming the mainstream in safety monitoring market, with video monitoring
The continuous extension of business, based on flexible IP networking technologys and abundant Internet resources, video monitoring system construction continues to develop,
Substantial amounts of head end video collecting device is deployed to each corner of society.It is increasingly extensive with deployment, network failure (such as
Cable failure, crystal head failure) potential incidence it is also increasing, cause video monitoring system operational support be faced with it is all
More problems.Such as most of user or engineering construction personnel, when pinpointing the problems failure, generally seek help without technical background
Professional, efficiency are low and of high cost.
On the other hand, as shown in Figure 1, web camera IPC is not man-to-man to be connected to network video recorder NVR
On (Network Video Recorder), this point connects with digital video recorder DVR (Digital Video Recorder)
Analog video camera difference is connect, analog video camera is a coaxial snap-fit connector BNC being directly connected on DVR
On (Bayonet Nut Connector) interface, there are many bnc interfaces on DVR, be one-to-one relation, a BNC connects
The corresponding analog video camera of mouth, so being easily found corresponding analog video camera on DVR.And it is currently based on IP network
In the IPC connection NVR epoch, NVR is upper general just only there are one RJ45 interfaces, can not pass through the correspondence of one IPC of an interface correspondence
Relation determines the relation of IPC.IPC1~IPC3 is connected to NVR by interchanger in Fig. 1, and IPC4~IPC6 is connected to exchange
It is connected to the interchanger of NVR connections after machine by optical fiber again.
Interchanger in Fig. 1 and on the connectivity port of web camera it is general all can there are two LED light, be respectively Link and
Act, wherein, Link lamps be show current interface whether UP/DOWN states, and ACT shows currently whether have data receiving and dispatching,
The frequency of ACT lamps flicker is directly proportional to the frequency of forwarding data packets.Under this network environment, even if when intermediate optical fiber breaks
After opening, the indicator light on all interchangers and web cam device is also all bright, and user is difficult to investigate the reason that goes wrong,
Let alone problem of fixing a breakdown.
Scene is safeguarded in installation, and engineering staff investigates network link situation, it usually needs artificial side is used on to equipment
Method is detected with instrument, and operation is inconvenient.The Link Layer Discovery Protocol LLDP for being additionally useful for neighbouring discovery is ethernet network
Equipment can announce itself by other nodes as interchanger, router and wireless local network connecting point define one kind into network
Existing method, can be used for judging the communication conditions of link.But LLDP interaction protocols are complicated, interactive result must lead to
Channel as crossing web or order line is shown, and is not easy to intuitively observe.
The content of the invention
The object of the present invention is to provide a kind of network connectivity fai_lure detection device and methods, can actively pass through network diagnosis
Message is responded to trigger the network equipment, so as to avoid the prior art that from can not carrying out effective and visual inspection in failure
The technical issues of.
To achieve these goals, technical solution of the present invention is as follows：
A kind of network connectivity fai_lure detection device, applied to the network equipment in network, the network equipment is provided with net
Road interface, described device include parsing module, control module and display module, wherein：
The parsing module for receiving and parsing the network diagnosis message broadcasted in network, parses network diagnosis report
The first control parameter parsed is sent to control module by the first control parameter carried in text；
The control module generates control signal, control display module is shown according to the first control parameter received
Show；
The display module receives control signal, is shown according to the first control parameter.
Further, the parsing module is additionally operable to：
The broadcast address of itself network segment is periodically connected, is not operated if it can connect, is otherwise controlled default second
Parameter processed is sent to control module, and control module generates control signal, control shows mould according to the second control parameter received
Block is shown according to default second control parameter；
Or periodically detect and whether connected with the connection of other equipment in network, it is not operated if it can connect, otherwise
Default second control parameter is sent to control module, control module is according to the second control parameter received, generation control
Signal, control display module are shown according to default second control parameter.
Further, the display module be the network equipment network interface Link lamps, the network diagnosis message
The first control parameter and second control parameter carried includes the flicker frequency and duration of Link lamps, and the Link lamps connect
The control signal that control module is sent is received, according to the timely progress line flicker of the flicker frequency.
Further, the network diagnosis message is Layer 2 Multicast message, and the type of the Layer 2 Multicast message is 802.3
Be the 0x8809 of the distribution of two-layer protocol at a slow speed in agreement, the first control parameter carried in the network diagnosis message with it is described pre-
If the second control parameter in flicker frequency and duration differ.
A kind of realization method of the present invention, when the data processing chip of the network equipment in itself includes processor, institute
It states parsing module and control module is contained in the processor, i.e., parsing module is used as using the processor of the network equipment in itself
And control module.
Another realization method of the present invention, when the data processing chip of the network equipment in itself does not include processor
When, the parsing module is contained in the data processing chip, and the control module is serially connected in the parsing module and is shown with described
Between showing module, i.e., using the network equipment data processing chip in itself as parsing module, and in addition increase control module
It is controlled.
The present invention proposes a kind of network connectivity fai_lure detection method simultaneously, described applied to the network equipment in network
The network equipment is provided with display module, the method includes the steps：
The network diagnosis message broadcasted in network is received and parsed, parses the first control carried in network diagnosis message
Parameter；
According to the first control parameter received, control signal is generated, controls the display module of the network equipment according to first
Control parameter is shown.
Further, the method further includes step：
The broadcast address of itself network segment is periodically connected, is not operated if it can connect, otherwise according to default second
Control parameter generates control signal, and control display module is shown according to default second control parameter；
Or periodically detect and whether connected with the connection of other equipment in network, it is not operated if it can connect, otherwise
Control signal is generated according to default second control parameter, control display module is shown according to default second control parameter
Show.
A kind of network connectivity fai_lure detection device and method proposed by the present invention, utilize the Link of network equipment network interface
Lamp carrys out response to network and diagnoses message into line flicker, can effectively judge network connection whether failure.Can hardly it increase firmly
On the premise of part cost, network failure is rapidly and efficiently investigated out.LED light displays whether that failure is concise directly perceived, can be in not shadow
On the premise of ringing existing system operation, which item or which section link failure quickly oriented.
Description of the drawings
Fig. 1 is video monitoring system networking structure schematic diagram of the embodiment of the present invention；
Fig. 2 is inventive network connecting fault structure of the detecting device schematic diagram；
Fig. 3 is a kind of circuit diagram of the embodiment of the present invention；
Fig. 4 is another circuit diagram of the embodiment of the present invention.
Specific embodiment
In order to more specifically describe the present invention, below in conjunction with the accompanying drawings and specific embodiment is to technical scheme
It is described in detail.
The present embodiment is illustrated by taking video monitoring system as shown in Figure 1 as an example, web camera IPC1~IPC3
It is connected by interchanger 1 with NVR, IPC4~IPC6 is connected to interchanger 2, and interchanger 2 connects interchanger 1 by optical fiber, then
It is connected with NVR.In normal conditions, when optical fiber is disconnected due to failure, the indicator light on interchanger and web camera
All be it is bright, can not by indicator light come carry out breakdown judge, it is necessary to by the connection between 2 points of manual inspection judging therefore
Barrier.Core concept of the present invention is the thinking broken the normal procedure, by NVR send network diagnosis message to change interchanger, network is taken the photograph
The flicker frequency and duration of LED light on the network equipments such as camera, so as to judge whether circuit breaks down.
As shown in Fig. 2, a kind of network connectivity fai_lure detection device of the present embodiment, including parsing module, control module and shows
Show module.
By taking the video monitoring system of Fig. 1 as an example, in order to detect network connectivity fai_lure, NVR sends specific network diagnosis report
Text, the network diagnosis message are sent in the form of multicast, can be flooded in double layer network, all network equipments and terminal are set
It is standby to receive this multicast message.Such as the multicast mac address of network diagnosis message can be set to be：0×0100-0CAA-
AAAA.This message is identified by specific purpose MAC in view of other network equipments, in order not to other two-layer protocol messages
Obscure, thus in the present embodiment the type of the network diagnosis message use in 802.3 for two-layer protocol at a slow speed distribution value 0 ×
8809.After other network equipments receive the message, network diagnosis message is judged as according to the type of message and is carried out subsequent
Operation.
The network connectivity fai_lure detection device of the present embodiment is set in the network device, is arranged on exchange in the present embodiment
In machine and web camera.Parsing module receives the network diagnosis message that NVR is sent, and parses what is carried in network diagnosis message
Control parameter is sent to control module, and control module controls display module to be shown according to the control parameter.
Display module is LED light in the present embodiment, on the network interface of interchanger and web camera, generally can all there is two
A LED light is Link and Act respectively.Wherein, Link lamps are to show that the state of current network interface is UP or DOWN states,
It is corresponding respectively to be always on or state of often going out, and Act lamps show currently whether have data receiving and dispatching, the frequency and forwarding that Act lamps flicker
The frequency of data message is directly proportional.Therefore usually it is used as the display of the present embodiment with the Link lamps of interchanger and web camera
Module judges whether network connection breaks down by controlling flicker frequency and the duration of Link lamps.For web camera
For, some web cameras also have infrared lamp, for carrying out the infrared illumination at night, to improve the clarity of image, because
The display module of this present embodiment can also be the infrared lamp of web camera, and the invention is not restricted to the specific shapes of display module
Formula.
In the case of display module is LED light, the control parameter carried in the present embodiment in network diagnosis message includes
The frequency and duration of LED light flicker, and if display module is loudspeaker, control parameter can be specific music, if aobvious
Show that module for screen, then can be specific picture, not repeat one by one here.The frequency that LED of the present embodiment etc. passes through flicker
It is displayed whether with duration as failure, such as：If flickered according to the frequency and duration of control parameter setting, it is judged as not having
Failure, and if being always on or often going out, then illustrate that the LED light is not set for flickering according to control parameter, it is believed that have
Failure.
In the present embodiment, video monitoring system includes NVR, interchanger and web camera, interchanger and network shooting
Machine is built-in with the device of the present embodiment, and the network diagnosis message that this NVR is sent is received on the interface for enter direction, and this is controlled to connect
The frequency (such as 3 times per second, interval repeats for 2 seconds) that Link lamps on mouth are set with control parameter carries out LED light flicker, with
Represent that the interface can receive the message of NVR, network connection is good, without failure.Since the flicker of Link lamps has no effect on actual number
According to forwarding, therefore display module is used as using Link lamps in the present embodiment, without using Act lamps.
The interchanger and web camera of the present embodiment control Link lamps into line flicker after network diagnosis message is received.
Wherein for interchanger, according to data processing chip (i.e. exchange chip) rank of interchanger, there are two types of embodiments：
Embodiment one, the exchange chip of interchanger carry control function, such as with central processor CPU.For this
Interchanger, parsing module and control module in the device of the present embodiment are all taken on by the exchange chip of the interchanger, therefore
The circuit diagram of existing switch can be directly multiplexed, the interlock circuit of specific Link lamps is as shown in figure 3, be not required hardware electricity
The variation on road.
Embodiment two, the exchange chip lower level of interchanger, without control function, i.e., without processor.At this time
It need to go here and there the control chip or microcontroller of the costs such as one before Link circuit for lamp.As shown in figure 4, the control letter of the microcontroller
Number line is connected in the controlling switch of this exchanger chip, receives and parse network diagnosis report as parsing module by exchange chip
Text controls chip or microcontroller module in order to control with increased, notifies increased microcontroller or control chip that LED is controlled to carry out
Flicker.
And for web camera, the circuit of LED light is without change, using available circuit, because existing
Web camera data processing chip generally all with CPU, using CPU as parsing module and control module, can control
The flicker frequency of LED light.But it need to be modified on software view, Link lamps flicker frequency is made to be received with duration according to it
Network diagnosis message in the control parameter that carries it is consistent.
Therefore, in diagnosis, it is which or which section is out of order to see that the flicker frequency of LED is easy to location determination to go out.
As shown in Figure 1, when carrying out network connectivity fai_lure diagnosis, if optical fiber between two fiber optical transceivers disconnects, interchanger 2 and
Web camera IP4~IP6 on connection interchanger 2 does not receive network diagnosis message, the net of their corresponding Way ins
Network interface LED light does not change, and interchanger 1 and its web camera IP1~IPC3 of connection receive network diagnosis report
Text, they flicker the network interface LED light of corresponding Way according to control parameter.Therefore it is easy to position institute of being out of order
.It should be noted that LED light flicker duration can be self-defined, be generally limited with 2 minutes, can according to actual conditions into
Row change duration.
It is easily understood that the present embodiment device is all effective to all-network equipment, it is after a kind of failure occurs, by managing
During member's investigation failure, being operated by dynamic response for network diagnosis message is sent to trigger NVR by administrator.But it sends network and examines
The equipment of disconnected message is not limited to NVR equipment, can also be sent by interchanger or web camera is sent, effect is sent with NVR
It is identical.Therefore, in different network systems, the equipment for sending network diagnosis message can be different, in principle for,
In the double layer network for needing to carry out network diagnosis, any one network equipment can initiate network diagnosis message, this implementation
Example is sent using NVR, is mainly considered that NVR can set operation interface, is operated convenient for administrator.
Further, the device of the present embodiment oneself can also actively initiate to detect and carry out alarm indication, and process is as follows：
Parsing module periodically connects the broadcast address of itself network segment, is not operated if it can connect, otherwise will be default
Control parameter be sent to control module, control module generates control signal, control shows mould according to the control parameter received
Block is shown according to default control parameter.
Or whether parsing module periodically detects and is connected with the connection of other equipment in network, if it can connect not
Otherwise default control parameter is sent to control module by operation, control module is according to the control parameter received, generation control
Signal, control display module are shown according to default control parameter.
By taking web camera as an example, judge that itself logical or obstructed method is as follows：
Whether 1. broadcasting the network segment where ping, back message can be received by seeing.Such as assume the IP address of web camera IPC
It is 10.222.100.3/24, then this web camera IPC can periodically detect ping10.222.100.255, and this is wide
Address is broadcast, sees if there is message response.Such as either with or without message respond, then illustrate this web camera IPC network failure, at this time this
Web camera IPC itself flickers infrared lamp to warn with certain frequency；
2. web camera IPC periodically goes to detect whether to communicate with the NVR that it is registered, if general rule itself is not with certain frequency
Rate flickers infrared lamp to warn this web camera IPC failures.
When web camera IPC detects itself with the surrounding network segment or NVR obstructed, with the frequency and duration of control parameter
Itself infrared lamp is flickered to warn.It should be noted that the control that the control parameter here preset at is carried with network diagnosis message
Parameter can be different, and the frequency of default control parameter manually can be triggered network diagnosis message by administrator with difference quickly
When flicker frequency difference.
Based on above device, the present embodiment also proposed a kind of network connectivity fai_lure detection method, applied in network
The network equipment.The network equipment is provided with display module, is specially the Link lamps of network interface, the method comprising the steps of：
The network diagnosis message broadcasted in network is received and parsed, parses the first control carried in network diagnosis message
Parameter；
According to the first control parameter received, control signal is generated, controls the display module of the network equipment according to first
Control parameter is shown.
Further, this method further includes step：
The broadcast address of itself network segment is periodically connected, is not operated if it can connect, otherwise according to default second
Control parameter generates control signal, and control display module is shown according to default second control parameter；
Or periodically detect and whether connected with the connection of other equipment in network, it is not operated if it can connect, otherwise
Control signal is generated according to default second control parameter, control display module is shown according to default second control parameter
Show.
Corresponding to the device of the invention, display module is the Link lamps of network equipment network interface, and network diagnosis message is taken
First control parameter of band and second control parameter include the flicker frequency and duration of Link lamps, and Link lamps receive control
Signal processed, according to the timely progress line flicker of the flicker frequency.Network diagnosis message be Layer 2 Multicast message, Layer 2 Multicast message
Type be the first control ginseng for being carried in network diagnosis message for the 0x8809 of the distribution of two-layer protocol at a slow speed in 802.3 agreements
Number is differed with flicker frequency and duration in default second control parameter.
It is understood that the above description of the embodiments is intended to facilitate those skilled in the art and using this hair
It is bright.Person skilled in the art obviously can easily make above-described embodiment various modifications, and described herein
General Principle is applied in other embodiment without having to go through creative labor.Therefore, the invention is not restricted to above-described embodiment,
Those skilled in the art's announcement according to the present invention, the improvement made for the present invention and modification all should be in the protections of the present invention
Within the scope of.
Claims (8)
1. a kind of network connectivity fai_lure detection device, applied to the network equipment in network, the network equipment is provided with network
Interface, which is characterized in that described device includes parsing module, control module and display module, wherein：
The parsing module for receiving and parsing the network diagnosis message broadcasted in network, is parsed in network diagnosis message
The first control parameter carried, control module is sent to by the first control parameter parsed；
The control module generates control signal, control display module is shown according to the first control parameter received；
The display module receives control signal, is shown according to the first control parameter；
The parsing module is additionally operable to：The broadcast address of itself network segment is periodically connected, is not operated if it can connect, otherwise
Default second control parameter is sent to control module, control module is according to the second control parameter received, generation control
Signal, control display module are shown according to default second control parameter；
Or periodically detect and whether connected with the connection of other equipment in network, it is not operated if it can connect, it otherwise will be pre-
If the second control parameter be sent to control module, control module generates control signal according to the second control parameter received,
Control display module is shown according to default second control parameter.
2. network connectivity fai_lure detection device according to claim 1, which is characterized in that the display module is the net
The Link lamps of network device network interface, the first control parameter and second control parameter that the network diagnosis message carries are equal
Flicker frequency and duration including Link lamps, the Link lamps receive the control signal that control module is sent, according to the sudden strain of a muscle
The timely progress line flicker of bright frequency.
3. network connectivity fai_lure detection device according to claim 2, which is characterized in that the network diagnosis message is two
Layer multicast message, the type of the Layer 2 Multicast message is the 0x8809 distributed in 802.3 agreements for two-layer protocol at a slow speed, described
The first control parameter carried in network diagnosis message and flicker frequency in default second control parameter and duration not phase
Together.
4. network connectivity fai_lure detection device according to claim 1, which is characterized in that the number of the network equipment in itself
Processor is included according to processing chip, the parsing module and control module are contained in the processor.
5. network connectivity fai_lure detection device according to claim 1, which is characterized in that the number of the network equipment in itself
Processor is not included according to processing chip, the parsing module is contained in the data processing chip, and the control module is serially connected in
Between the parsing module and the display module.
A kind of 6. network connectivity fai_lure detection method, applied to the network equipment in network, which is characterized in that the network equipment
Display module is provided with, the method includes the steps：
The network diagnosis message broadcasted in network is received and parsed, parses the first control ginseng carried in network diagnosis message
Number；
According to the first control parameter received, control signal is generated, controls the display module of the network equipment according to the first control
Parameter is shown；
The method further includes step：
The broadcast address of itself network segment is periodically connected, is not operated if it can connect, otherwise according to the default second control
Parameter generates control signal, and control display module is shown according to default second control parameter；
Or periodically detect and whether connected with the connection of other equipment in network, it is not operated if it can connect, otherwise basis
Default second control parameter generates control signal, and control display module is shown according to default second control parameter.
7. network connectivity fai_lure detection method according to claim 6, which is characterized in that the display module is the net
The Link lamps of network device network interface, the first control parameter and second control parameter that the network diagnosis message carries are equal
Flicker frequency and duration including Link lamps, the Link lamps receive control signal, according to the timely progress of the flicker frequency
Line flicker.
8. network connectivity fai_lure detection method according to claim 7, which is characterized in that the network diagnosis message is two
Layer multicast message, the type of the Layer 2 Multicast message is the 0x8809 distributed in 802.3 agreements for two-layer protocol at a slow speed, described
The first control parameter carried in network diagnosis message and flicker frequency in default second control parameter and duration not phase
Together.
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| CN106603323B (en) * | 2015-10-20 | 2019-06-04 | 技嘉科技股份有限公司 | Detect the detection method of jig, network interface transfers rate |
| CN106534369B (en) * | 2016-12-19 | 2019-10-18 | 浙江宇视科技有限公司 | Communication means and device |
| CN107241218B (en) * | 2017-05-26 | 2020-07-28 | 南京南瑞继保电气有限公司 | Fault detection method and device |
| CN109803301B (en) * | 2019-03-20 | 2021-11-09 | 安徽宽广科技有限公司 | Offline identification management system for wireless network |
| CN111629471B (en) * | 2020-05-09 | 2023-08-04 | 江苏利特曼照明科技有限公司 | Multifunctional lighting system |
| CN112637435B (en) * | 2020-12-14 | 2023-04-07 | 瑞斯康达科技发展股份有限公司 | Troubleshooting method and system for virtual conference telephone group |
| CN112954723A (en) * | 2021-02-23 | 2021-06-11 | 上海汉图科技有限公司 | Network diagnosis method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101072147A (en) * | 2007-06-20 | 2007-11-14 | 重庆邮电大学 | Industrial Ethernet protocol analysisand field tester |
| CN101360036A (en) * | 2007-07-31 | 2009-02-04 | 比亚迪股份有限公司 | CAN bus gateway controller and data transmission method between CAN buses |
| CN101382803A (en) * | 2008-10-17 | 2009-03-11 | 奇瑞汽车股份有限公司 | Vehicle-mounted on-line diagnose system based on SAEJ1939 |
| CN201350880Y (en) * | 2009-02-13 | 2009-11-25 | 栾天昊 | Vehicle-mounted integrated information management system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0020004D0 (en) * | 2000-08-14 | 2000-10-04 | 3Com Corp | Diagnosis of link failures in a network |
| US7743143B2 (en) * | 2002-05-03 | 2010-06-22 | Oracle America, Inc. | Diagnosability enhancements for multi-level secure operating environments |
-
2015
- 2015-04-27 CN CN201510206589.5A patent/CN104780081B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101072147A (en) * | 2007-06-20 | 2007-11-14 | 重庆邮电大学 | Industrial Ethernet protocol analysisand field tester |
| CN101360036A (en) * | 2007-07-31 | 2009-02-04 | 比亚迪股份有限公司 | CAN bus gateway controller and data transmission method between CAN buses |
| CN101382803A (en) * | 2008-10-17 | 2009-03-11 | 奇瑞汽车股份有限公司 | Vehicle-mounted on-line diagnose system based on SAEJ1939 |
| CN201350880Y (en) * | 2009-02-13 | 2009-11-25 | 栾天昊 | Vehicle-mounted integrated information management system |
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