CN101764722A - Method for detecting link and device and system thereof - Google Patents
Method for detecting link and device and system thereof Download PDFInfo
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- CN101764722A CN101764722A CN200910258779A CN200910258779A CN101764722A CN 101764722 A CN101764722 A CN 101764722A CN 200910258779 A CN200910258779 A CN 200910258779A CN 200910258779 A CN200910258779 A CN 200910258779A CN 101764722 A CN101764722 A CN 101764722A
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Abstract
The invention discloses a method for detecting link and a device and a system thereof, wherein the method comprises the following steps: a first network element sends requests to a second network element at a predetermined time interval; the first network element determines whether a response from the second network element is received according to each sent request; the first network element, determines that a communication link between the first network element and the second network element breaks down when judging that no response from the second network element is received for predetermined times continuously. With the invention, the network communication link state can be detected through the way of request and response, thereby operating situation of the network can be easily obtained, which is helpful for fault recovery when errors occur to the network link and ensures normal operation of business.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of chain circuit detecting method, device and system.
Background technology
Along with global system for mobile communications (Global System for Mobile Communications, abbreviate GSM as) broad application, the continuing of number of users and number of services increased, especially along with third and fourth generation mobile communication technology development dataset user increase is obvious day by day, cause network and transfer resource anxiety.
The transmission network of traditional mobile cellular network generally is based on traditional time division multiplexing (TimeDivision Multiplex, abbreviate TDM as) pattern or asynchronous transfer mode (Asynchronous TransferMode, abbreviate ATM as) communicate, for example GSM technology, enhanced data rates for gsm evolution (Enhanced Data Rate for GSM Evolution, abbreviate EDGE as) technology, Universal Mobile Telecommunications System (Universal Mobile Telecommunications System abbreviates UMTS as) technology.
At present, based on the incompatible professional demand of the conventional transmission network of TDM/ATM exchange, and along with the all-IP arrival in (Internet Protocol) epoch, professional IPization can be ordered about wireless network to IPization transition.EDGE business, 3G (Third Generation) Moblie (3
RdGeneration, abbreviate 3G as) professional, IP multimedia system (IP Multimedia Subsystem, abbreviate IMS as), the network that provides of IP-based business need such as the fusion (Fixed-mobile Convergence abbreviates FMC as) of fixed network and mobile network operator possesses following characteristics: big bandwidth, be fit to IP operation carrying, high efficiency and low cost.IP is as the technology of a kind of big bandwidth, easily acquisition, high efficiency, low cost, representative future thrust, and especially in Long Term Evolution (Long Term Evolution the abbreviates LTE as) epoch, IPization leads the trend of network transformation irreversible.
In general, the IP network technology that can obtain is based on the network of ethernet technology, these networks with such as SDH (Synchronous Digital Hierarchy) (Synchronous Digital Hierarchy, abbreviate SDH as) traditional TDM transmission network difference, Ethernet lacks ripe operation management maintain (Operation, Administration, Maintenance abbreviate OAM as) mechanism.
For example, the traditional ethernet network lacks the rapid link testing mechanism, so just can't determine whether the link between the heterogeneous networks entity is unobstructed in the network, thereby can't know the function situation of network, be not easy to the eliminating of network failure, and can cause harmful effect business.
At in the correlation technique owing to can't to the traditional ethernet network carry out link detecting cause knowing network function situation, be not easy to the eliminating of network failure and can cause dysgenic problem business.
Summary of the invention
At in the correlation technique owing to can't to the traditional ethernet network carry out link detecting cause knowing network function situation, be not easy to the eliminating of network failure and can cause dysgenic problem business, whether the present invention proposes a kind of chain circuit detecting method, can break down with the link that simple mode detects in the network.
At in the correlation technique owing to can't to the traditional ethernet network carry out link detecting cause knowing network function situation, be not easy to the eliminating of network failure and can cause dysgenic problem business, whether the present invention also proposes a kind of link detecting device, can break down with the link that simple mode detects in the network.
At in the correlation technique owing to can't to the traditional ethernet network carry out link detecting cause knowing network function situation, be not easy to the eliminating of network failure and can cause dysgenic problem business, whether the present invention also proposes a kind of link detecting system, can break down with the link that simple mode detects in the network.
Technical scheme of the present invention is achieved in that
A kind of chain circuit detecting method is characterized in that, comprising:
First network element sends request with predetermined time interval to second network element;
Described first network element judges whether to receive the response that second network element sends at the request of each transmission;
Described first network element determines that the communication link between described first network element and described second network element breaks down when the predetermined number contents is judged the response that does not receive the transmission of second network element continuously.
Further, said method also comprises:
Described first network element is judged and is received the response that described second network element sends, and preserves described response;
Described first network element simultaneously before described second network element sends described request or, with the described response deletion of preserving next time.
Wherein, the link between described first network element and described second network element is a wire link.
Preferably, described request is an arp request, and described response is the address resolution protocol response.
Wherein, described first network element is among the server and client side, and described second network element is another in the client and server; Perhaps,
Described first network element is in base station and the controller, and described second network element is another in controller and the base station.
A kind of link detecting device is arranged in network entity, comprising:
Timer is used to carry out timing;
Sending module is used for sending request with predetermined time interval to recipient's network entity of other network entities according to the timing of described timer;
Receiver module is used to receive the response that described recipient's network entity returns in response to each request;
Counter is used to calculate not from described recipient's network entity and receives quantity corresponding to the response of described request;
Processing module is used for determining that the communication link between described network entity and the described recipient's network entity breaks down under situation about not receiving from described recipient's network entity corresponding to the request responding that reaches predetermined quantity that sends continuously.
Preferably, described processing module also is used for after described receiver module receives response, and the value of described counter is made zero.
Further, said method also comprises:
Preserve module, be used for when described receiver module receives each response, preserving described response;
Then described processing module also is used at described sending module simultaneously before described recipient's network entity sends request or next time, with the described response deletion of preserving in the described preservation module.
Wherein, described request is an arp request, and described response is the address resolution protocol response.
Preferably, described receiver module also is used for receiving the request that the transmit leg network entity of described other network entities sends to described network entity, and described sending module also is used to respond the described request from described transmit leg entity of reception and returns response to described transmit leg network entity.
Wherein, described network entity is among the server and client side, and described recipient's network entity is another in the client and server; Perhaps,
Described network entity is in base station and the controller, and described recipient's network entity is another in controller and the base station.
A kind of link detecting system, it is characterized in that, comprise a plurality of network elements, each network element in described a plurality of network elements is used for sending request with predetermined time interval to part or all of other network elements of described a plurality of network elements, and response is returned response from the request of other network elements; In described a plurality of network elements, judge whether to receive the response of second network element transmission at the request of each transmission as first network element of request transmit leg, and judge when not receiving the response that second network element sends in continuous predetermined number contents at described first network element, determine that the communication link between described first network element and described second network element breaks down.
Wherein, described a plurality of network element link each other is a wire link.
Preferably, described request is an arp request, and described response is the address resolution protocol response.
Preferably, described first network element is among the server and client side, and described second network element is another in the client and server; Perhaps,
Described first network element is in base station and the controller, and described second network element is another in controller and the base station.
By means of technique scheme of the present invention, mode by request and response has realized detection to communication link state in the network, thereby easily know the function situation of network, help network link fault to occur carrying out when unusual and get rid of, guarantee professional normally carrying out; And, can adopt various request/response mechanism, be applied to diverse network simultaneously and detect, be with good expansibility and applicability.
Description of drawings
Fig. 1 is the flow chart according to the chain circuit detecting method of the embodiment of the invention;
Fig. 2 is that the chain circuit detecting method according to the embodiment of the invention detects the process chart under the link normal condition;
Fig. 3 is that the chain circuit detecting method according to the embodiment of the invention detects the process chart under the link abnormal conditions;
Fig. 4 is the process chart according to detection side's treatment mechanism of the embodiment of the invention;
Fig. 5 is the composition structure chart according to the link detecting device of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is described.
Fig. 1 is the flow chart of steps of the chain circuit detecting method of the embodiment of the invention, as shown in Figure 1, comprises following processing:
Step S101, first network element sends request with predetermined time interval to second network element, and wherein, the link between first network element and second network element is a wire link.
Step S102, first network element judges whether to receive the response that second network element sends at the request of each transmission, wherein, if judging, first network element receives the response that second network element sends, can preserve this response, and simultaneously before second network element sends request or, with the response deletion of preserving next time.
Step S102, first network element is when the predetermined number contents is judged the response that does not receive the transmission of second network element continuously, determine that the communication link between first network element and second network element breaks down, promptly, first network element does not receive situation corresponding to the request responding that reaches predetermined quantity that sends continuously from second network element under, determine that the communication link between first network element and second network element breaks down.
First network element is among the server and client side, and second network element is another in the client and server; Perhaps, first network element is in base station and the controller, and second network element is another in controller and the base station.Promptly, when above-mentioned first network element was server, second network element can be client, perhaps, when above-mentioned first network element is client, second network element can be server, perhaps, and when above-mentioned first network element is the base station, second network element can be controller, perhaps, when above-mentioned first network element was controller, second network element can be the base station.
By above-mentioned processing, can realize detection by the mode of request and response, thereby can easily know the function situation of network communication link state in the network, help network link to occur carrying out fault when unusual and get rid of, guarantee professional normally carrying out; And, can adopt various request/response mechanism, be applied to diverse network simultaneously and detect, be with good expansibility and applicability.
For better the present invention will be described, be address resolution protocol (Address Resolution Protocol with first network element to the request that second network element sends below, abbreviate ARP as) request, the response that second network element returns to first network element is that the address resolution protocol response describes for example, those skilled in the art as can be known, for the realization mechanism of other requests and response, the present invention can realize equally.
In the traditional IP, (carry medium access control (Media Access Control in this response by ARP request (carrying purpose IP address in this request) and arp response between network element, abbreviate MAC as) address), that is, traditional ARP agreement is the agreement by Target IP query aim MAC Address (L2 MAC Address).In the embodiment of the invention, the ARP protocol application in link detecting mechanism, is carried out the L2 link detecting, for example, under the Ethernet networking situation, the link detecting mechanism of L2.
Fig. 2 is that the chain circuit detecting method according to the embodiment of the invention detects the process chart under the link normal condition.As shown in Figure 2, comprise following processing:
Step S201, tested side (that is, second network element mentioned above) initiates the link setup request to detection side's (that is, first network element mentioned above), alternatively, in this step, also being that the detection side is to the request of tested side initiation link setup.
Step S202, the detection side returns the link setup success message to tested side, at this moment, the link establishment success between detection side and the tested side.
Step S203, the detection side sends the ARP request to tested side, carries tested side's IP address in this ARP request.
Step S204, tested direction detection side returns arp response, wherein, carry tested side's MAC Address in this arp response, after the detection side receives this arp response, can preserve tested side's IP address and tested side's the corresponding clauses and subclauses of MAC Address in detection side this locality, the detection side receives above-mentioned arp response, can be with this clauses and subclauses deletion.
Step S205, the detection side sends the ARP request to tested side, carries tested side's IP address in this ARP request.
Step S206, tested direction detection side returns arp response, wherein, carry tested side's MAC Address in this arp response, after the detection side receives this arp response, can preserve tested side's IP address and tested side's the corresponding clauses and subclauses of MAC Address in detection side this locality, the detection side receives above-mentioned arp response, can be with this clauses and subclauses deletion.
As shown in Figure 2, if detection side and tested side's link keeps normal connection status always, then, repeat no more here existing between detection side and the tested side as the interacting message between step S203 and step S204 or step S205 and the step S206.
Fig. 3 is that the chain circuit detecting method according to the embodiment of the invention detects the process chart under the link abnormal conditions, promptly, the L2 link that the detection side detects between itself and the tested side breaks down, and when supposing here that the detection side is continuous and not receiving arp response three times, expression detects failure.As shown in Figure 3, specifically comprise following processing:
Step S301, tested side (that is, second network element mentioned above) initiates the link setup request to detection side's (that is, first network element mentioned above), alternatively, in this step, also being that the detection side is to the request of tested side initiation link setup.
Step S302, the detection side returns the link setup success message to tested side, at this moment, the link establishment success between detection side and the tested side.
Step S303, the detection side sends the ARP request to tested side, carries tested side's IP address in this ARP request.
Step S304, tested direction detection side returns arp response, wherein, carries tested side's MAC Address in this ARP request, but this arp response loses, and the party to be detected does not receive.
Step S305, detection side continue to send the ARP request to tested side, carry tested side's IP address in this ARP request.
Step S306, tested direction detection side returns arp response, wherein, carries tested side's MAC Address in this ARP request, but this arp response loses, and the party to be detected does not receive.
Step S307, the detection side sends the ARP request to tested side, wherein, carries tested side's IP address in this ARP request.
Step S308, tested direction detection side returns arp response, carries tested side's MAC Address in this ARP request, but this arp response loses, and the party to be detected does not receive.
Step S309, detection side detect it and have sent three ARP requests continuously and all do not receive response from the party to be detected, determine the L2 link failure between detection side and the tested side.
In the specific implementation process, the detection side is in order to determine to send the opportunity of ARP request and the quantity that does not receive arp response of definite link failure time institute reference, the timer sum counter can be set in the detection side, wherein, timer is used for timing, make the detection side just to send the ARP request to tested side by every interval predetermined amount of time, counter is used to add up does not receive the quantity of arp response, the yardstick that control fault is judged continuously.Below in conjunction with Fig. 4 the treatment mechanism of detection side in the embodiment of the invention is described, as shown in Figure 4, may further comprise the steps:
Arp timer TimerARPDetect is set for step S401, detection side and ARP detects fail counter CounterARPDetectFail, and wherein, the Preset Time section of this timer is less than the ageing timer of conventional ARP, and tested side powers on the back to detection side's link setup; After the detection side receives tested side's link setup request, respond tested side's request and link setup success, tested side and detection side's communication are normal, and the detection side starts arp timer TimerARPDetect, and ARP is detected fail counter CounterARPDetectFail zero clearing.
It is overtime that step S402, detection side detect ARP detection timer TimerARPDetect, then sends the APR request to tested side, carries tested side's IP address in this request.
Step S403, the detection side detects its this locality and whether receives the APR response of asking in response to the APR among the step S402, promptly, the detection side detects its this locality and whether preserves tested side's IP address and tested side's the corresponding clauses and subclauses of MAC Address, if judged result is for being, then enter step S404, otherwise enter into step S405.
Step S404, detection side remove the APR response among the step S403,, remove the tested side's who preserves among the step SS403 IP address and tested side's the corresponding clauses and subclauses of MAC Address that is; Remove ARP and detect fail counter CounterARPDetectFail, that is, ARP is detected fail counter CounterARPDetectFail make zero, and enter into step S402.
Step S405, the detection side increases by 1 with the counting that ARP detects fail counter CounterARPDetectFail, and enters into step S406.
Step S406, whether the count value that detects among the ARP detection fail counter CounterARPDetectFail surpasses the threshold value that sets in advance, if judged result then enters into step S407 for being, otherwise enters into step S402.
Step S407, detection side determine and tested side between the L2 link failure, and report and alarm is to carry out subsequent treatment.
Consider in the ICP/IP protocol stack, the ARP agreement is operated between L3 and the L2, can provide the network address to arrive the conversion of physical address, typically refer to the conversion of IP address to MAC address, by extremely processing shown in Figure 4 of Fig. 2, by introducing ARP link detecting timer and ARP link detecting fail counter, can carry out link detecting based on ARP mechanism, adopt MAC Address to obtain function and realize link detecting end to end, and regularly initiatively send the ARP request and check that whether normally the arp response of whether normally receiving tested side reaches L2 link purpose by the detection side, can effectively know the state of link in the network, be convenient to accurate fault location, the assurance business is carried out, and improve less to the network equipment, cost is lower, realization mechanism is simply effective, can effectively promote the OAM ability of network to link, and go for the link detecting of the L2 between cellular network IPization back controller and the base station, L2 link detecting when local area network (LAN) is interconnected or between client and server also is applicable to other network with similar detection scene simultaneously.
Fig. 5 is that this device can be arranged in network entity according to the composition structure chart of the link detecting device of the embodiment of the invention, and as shown in Figure 5, this link detecting device comprises:
Sending module 52 is used for sending request with predetermined time interval to recipient's network entity of other network entities according to the timing of timer 51;
Wherein, receiver module 52 also is used for receiving the request of the transmit leg network entity of other network entities to the network entity transmission, and sending module 53 also is used for returning response in response to the request from the transmit leg entity that receives to the transmit leg network entity.
Wherein, above-mentioned request can be arp request, and above-mentioned response can respond for address resolution protocol.
Wherein, network entity is among the server and client side, and recipient's network entity is another in the client and server; Perhaps, network entity is in base station and the controller, and recipient's network entity is another in controller and the base station.
According to the embodiment of the invention, a kind of link detecting system is provided, this link detecting system comprises a plurality of network elements, and each network element in a plurality of network elements is used for sending request with predetermined time interval to part or all of other network elements of a plurality of network elements, and returns response in response to the request from other network elements; In a plurality of network elements, judge whether to receive the response of second network element transmission at the request of each transmission as first network element of request transmit leg, and judge when not receiving the response that second network element sends in continuous predetermined number contents at first network element, determine that the communication link between first network element and second network element breaks down.
Wherein, above-mentioned request can be arp request, and above-mentioned response can respond for address resolution protocol.
Wherein, first network element can be among the server and client side, and second network element can be in the client and server another; Perhaps, first network element can be in base station and the controller, and second network element can be in controller and the base station another.
By said system and device, can realize detection by the mode of request and response to communication link state in the network, thereby can easily know the function situation of network, help network link fault to occur carrying out when unusual and get rid of, guarantee professional normally carrying out; And, can adopt various request/response mechanism, be applied to diverse network simultaneously and detect, be with good expansibility and applicability.
In addition, said system and device can be realized the processing shown in Fig. 1 to 4 equally, thereby realize link detecting by existing ARP mechanism, describe before its detailed process, no longer repeat here.
Therefore, by network element is introduced ARP link detecting timer and ARP link detecting fail counter, can carry out link detecting based on ARP mechanism, adopt MAC Address to obtain function and realize link detecting end to end, and regularly initiatively send the ARP request and check that whether normally the arp response of whether normally receiving tested side reaches L2 link purpose by the detection side, can effectively know the state of link in the network, be convenient to accurate fault location, the assurance business is carried out, and improve less to the network equipment, cost is lower, realization mechanism is simply effective, can effectively promote the OAM ability of network to link, and go for the link detecting of the L2 between cellular network IPization back controller and the base station, L2 link detecting when local area network (LAN) is interconnected or between client and server also is applicable to other network with similar detection scene simultaneously.
Should be noted that first network element of mentioning only is relative notion with second network element herein, second network element can be used as first network element equally other network elements is detected, and, can detect mutually between the network element.In addition, the transmit leg network entity of above mentioning and recipient's network entity are meant the network element in the network equally, and the recipient can send request to other network entities equally, to detect the communication link state between itself and other network entity.
By technique scheme of the present invention, above-mentioned processing can realize the detection of communication link in the network by increasing timer and counter based on existing traditional ARP mechanism, can effectively know the state of link, be convenient to accurate fault location, the assurance business is carried out; And less to network equipment improvement, cost is lower, and realization mechanism is simply effective, can effectively promote the OAM ability of network to link; And go for multiple network, be with good expansibility and applicability.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a chain circuit detecting method is characterized in that, comprising:
First network element sends request with predetermined time interval to second network element;
Described first network element judges whether to receive the response that second network element sends at the request of each transmission;
Described first network element determines that the communication link between described first network element and described second network element breaks down when the predetermined number contents is judged the response that does not receive the transmission of second network element continuously.
2. method according to claim 1 is characterized in that, also comprises:
Described first network element is judged and is received the response that described second network element sends, and preserves described response;
Described first network element simultaneously before described second network element sends described request or, with the described response deletion of preserving next time.
3. method according to claim 1 and 2 is characterized in that, the link between described first network element and described second network element is a wire link.
4. method according to claim 1 and 2 is characterized in that, described request is an arp request, and described response is the address resolution protocol response.
5. method according to claim 1 and 2 is characterized in that,
Described first network element is among the server and client side, and described second network element is another in the client and server; Perhaps,
Described first network element is in base station and the controller, and described second network element is another in controller and the base station.
6. a link detecting device is arranged in network entity, it is characterized in that, comprising:
Timer is used to carry out timing;
Sending module is used for sending request with predetermined time interval to recipient's network entity of other network entities according to the timing of described timer;
Receiver module is used to receive the response that described recipient's network entity returns in response to each request;
Counter is used to calculate the quantity that does not receive response from described recipient's network entity;
Processing module is used for determining that the communication link between described network entity and the described recipient's network entity breaks down when the predetermined number contents does not receive the response of described recipient's network entity transmission continuously.
7. link detecting device according to claim 6 is characterized in that, described processing module also is used for after described receiver module receives response, and the value of described counter is made zero.
8. link detecting device according to claim 6 is characterized in that, also comprises:
Preserve module, be used for when described receiver module receives each response, preserving described response;
Then described processing module also is used at described sending module simultaneously before described recipient's network entity sends request or next time, with the described response deletion of preserving in the described preservation module.
9. link detecting device according to claim 6, it is characterized in that, described receiver module also is used for receiving the request of the transmit leg network entity of described other network entities to described network entity transmission, and described sending module also is used for returning response in response to the described request from described transmit leg entity that receives to described transmit leg network entity.
10. according to each described link detecting device in the claim 6 to 9, it is characterized in that described request is an arp request, described response is the address resolution protocol response.
11. according to each described link detecting device in the claim 6 to 9, it is characterized in that,
Described network entity is among the server and client side, and described recipient's network entity is another in the client and server; Perhaps,
Described network entity is in base station and the controller, and described recipient's network entity is another in controller and the base station.
12. link detecting system, it is characterized in that, comprise a plurality of network elements, each network element in described a plurality of network elements is used for sending request with predetermined time interval to part or all of other network elements of described a plurality of network elements, and returns response in response to the request from other network elements; In described a plurality of network elements, judge whether to receive the response of second network element transmission at the request of each transmission as first network element of request transmit leg, and judge when not receiving the response that second network element sends in continuous predetermined number contents at described first network element, determine that the communication link between described first network element and described second network element breaks down.
13. system according to claim 12 is characterized in that, described request is an arp request, and described response is the address resolution protocol response.
14. according to claim 12 or 13 described systems, it is characterized in that,
Described first network element is among the server and client side, and described second network element is another in the client and server; Perhaps,
Described first network element is in base station and the controller, and described second network element is another in controller and the base station.
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| CN102447595A (en) * | 2011-12-05 | 2012-05-09 | 上海顶竹通讯技术有限公司 | Detection method for multiprocessing unit network source access |
| CN103139820A (en) * | 2013-03-12 | 2013-06-05 | 华为技术有限公司 | Link detection method and network elements |
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