CN101729307A - Failure detecting method, communication equipment and network system - Google Patents
Failure detecting method, communication equipment and network system Download PDFInfo
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- CN101729307A CN101729307A CN200810218715A CN200810218715A CN101729307A CN 101729307 A CN101729307 A CN 101729307A CN 200810218715 A CN200810218715 A CN 200810218715A CN 200810218715 A CN200810218715 A CN 200810218715A CN 101729307 A CN101729307 A CN 101729307A
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Abstract
The embodiment of the invention discloses a failure detecting method, communication equipment and a network system. The method comprises the following steps: current maintenance terminal point receives a communication detecting message transmitted by other maintenance terminal points in a network and detects and obtains a maintenance terminal point which breaks down according to the overtime condition of other maintenance terminal points for transmitting the communication detecting message; the first communication detecting message is generated and carries failure terminal point information; and the first communication detecting message is transmitted to maintenance terminal points in the network, except the current maintenance terminal point, so that other maintenance terminal points in the network extract and report the failure terminal point information from the first communication detecting message. By the embodiment of the invention, a receiving party of the communication detecting message can obtain and report the failure terminal point information from the communication detecting message, thereby discovering the maintenance terminal point generating single-passage failure in the network in real time, namely equipment generating transmitting passage failure and receiving passage normalization.
Description
Technical field
The present invention relates to field of network communication, relate in particular to a kind of fault detection method, communication equipment and network system.
Background technology
Because the existence of the business of Operations, Administration and Maintenance etc., whether the relevant device that needs to detect in the network normally moves.At IEEE (Institute of Electrical and Electronics Engineers, IEEE-USA) Std (Standard, standard) defined a kind of mechanism of Operations, Administration and Maintenance one set of network devices in the 802.1ag agreement, this mechanism relates to path discovery, fault detect, failure proof and isolation, signalling trouble and fault restoration.
As shown in Figure 1, suppose to need in the network to safeguard one group of (totally 4) equipment, these equipment link to each other by some intermediary network device, and these intermediary network device have correct forwarding communication with detection message (ContinuityCheck Message, CCM) ability of message.Maintaining end point of configuration in every equipment that needs to safeguard (Maintenance End Point, MEP).Disposed after the MEP, these equipment begin periodically to send the CCM message, and come detection failure by receiving the CCM message that other equipment send over.
And the equipment of judging other equipment faults can be used for other equipment transmissions in network to represent to have in the network equipment sign of fault to occur.
But, in realizing process of the present invention, the inventor finds in the prior art, above-mentioned sign can only represent whether there is faulty equipment in the network, when receiver equipment generation sendaisle fault, but during the normal situation of receive path, though this receiver equipment can be received above-mentioned sign, this receiver equipment can't know in real time that fault has taken place for self, cause to locate out of order particular location in real time, particularly occur to receive the single-channel fault equipment that message can not send message.
Summary of the invention
The embodiment of the invention is, a kind of fault detection method, communication equipment and network system are provided, and can find to occur in the network maintaining end point of single channel fault in real time, the sendaisle fault promptly takes place and the normal equipment of receive path.
For this reason, on the one hand, embodiments of the invention provide a kind of fault detection method, comprise: current maintaining end point receives the communication with detection message that other maintaining end points are sent in the network, and the overtime situation that sends communication with detection message according to described other maintaining end points detects the maintaining end point that obtains breaking down; Generate the first communication with detection message, the described first communication with detection message carries the fault terminal point information; Other maintaining end points send the described first communication with detection message except that current maintaining end point in network, make other maintaining end points in the network extract the fault terminal point information from this first communication with detection message and report.
On the other hand, embodiments of the invention provide a kind of communication equipment, comprising: receiving element is used for receiving the communication with detection message that the network maintaining end point sends; Detecting unit, the overtime situation that is used for the communication with detection message sent according to the network maintaining end point detects the maintaining end point that obtains breaking down in the network; Generation unit is used for generating the first communication with detection message according to the testing result of described detecting unit, comprises the fault terminal point information in the described first communication with detection message; Transmitting element is used for sending the described first communication with detection message to each maintaining end point of network, and feasible each maintaining end point that receives the described first communication with detection message extracts the fault terminal point information and reports from the described first communication with detection message.
Embodiments of the invention have also comprised a kind of network system, described system comprises first maintaining end point and second maintaining end point, wherein, described first maintaining end point, the overtime situation that is used for the communication with detection message that other maintaining end points according to network system send detects the maintaining end point that obtains breaking down, generate and send the first communication with detection message to second maintaining end point, the described first communication with detection message comprises the fault terminal point information; Described second maintaining end point is used to receive the described first communication with detection message, obtains the fault terminal point information from the described first communication with detection message extraction, and reports described end points fault message.
In the technical scheme of the embodiment of the invention, when a certain maintaining end point is found faulty equipment is arranged, in the communication with detection message that sends thereafter, carry the fault terminal point information, when fault takes place to send receiver equipment, but during the normal situation of receiving function, this receiver equipment can know the information of the equipment that fault has taken place and report from the CCM message that receives, thereby can find to occur in the network maintaining end point of single channel fault in real time.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that a kind of MEP connects the situation schematic diagram in the existing network system;
Fig. 2 is an idiographic flow schematic diagram of the fault detection method in the embodiment of the invention;
Fig. 3 is the handling process schematic diagram that second maintaining end point receives the first communication with detection message described in Fig. 2 in the embodiment of the invention;
Fig. 4 is a network system schematic diagram with 7 equipment;
Fig. 5 is the simplification form schematic diagram of the CCM message that MEP1 sends among Fig. 4;
Fig. 6 is the simplification form schematic diagram of the CCM message that MEP4 sends among Fig. 4;
Fig. 7 is the composition schematic diagram of a kind of network system in the embodiment of the invention;
Fig. 8 is a kind of composition schematic diagram of first maintaining end point among Fig. 7;
Fig. 9 is a kind of composition schematic diagram of first maintaining end point among Fig. 7;
Figure 10 is a concrete composition schematic diagram of the maintaining end point in the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
As shown in Figure 2, be one of the fault detection method in the embodiment of the invention concrete schematic flow sheet, this flow process comprises:
201, current maintaining end point receives the communication with detection message that other maintaining end points are sent in the network, and the overtime situation that sends communication with detection message according to described other maintaining end points detects the maintaining end point that obtains breaking down.As, current maintaining end point (as being the MEP1 among Fig. 1) receives the communication with detection message that other maintaining end points periodically send in the network (as can be the CCM message in the 1AG agreement, in other agreements, can be the message that other realize the communication with detection function); MEP1 surpass the preset threshold value time (as, 2 times or 3.5 times of times in described cycle) after, also do not receive a certain maintaining end point (as second maintaining end point) or a plurality of maintaining end point (as second, third ... wait maintaining end point) the CCM message that sends according to described cycle, since contain in the CCM message sender identification information, MAC Address, transmit Sequence Number and other agreement relevant informations etc., therefore MEP1 can be known the information of the maintaining end point that fault has taken place according to the situation of the CCM message that receives, as maintaining end point identification information, MAC Address etc.
Wherein, maintaining end point can be configured on the multiple communication equipment, comprises network side and end side, as long as support the equipment of 1AG agreement just can dispose MEP.
202, generate the first communication with detection message, the described first communication with detection message carries the fault terminal point information, and described fault terminal point information is used to identify the described maintaining end point that breaks down; Wherein, the first communication with detection message can comprise the sign of the maintaining end point of fault, or also comprises in order to whether the remote defect indication (rdi) sign of maintaining end point fault is arranged in the marked network.Wherein, the sign of the maintaining end point of described fault comprises described other maintaining end point signs of at least one fault.The medium access control of the maintaining end point that is designated described fault of the maintaining end point of described fault (Media Access Control, MAC) the agreement relevant identifier of the maintaining end point of address, IP (internet interconnection protocol, Internet Protocol) address or the described fault of other unique identifications.Should be understood that: distinguish for the communication with detection message that other maintaining end points in the network that receives with current maintaining end point are sent, the communication with detection message of Sheng Chenging is called the first communication with detection message here.
203, in network except that current maintaining end point other maintaining end points send the described first communication with detection message, make other maintaining end points in the network from this first communication with detection message, extract the fault terminal point information and report.
Should be understood that, communication with detection message can be that multicast sends, the destination address that is communication with detection message is a multicast address, makes the maintaining end point (communication equipment) that needs to safeguard in the network can receive this multicast message smoothly and be unlikely to cause broadcast storm; Also can be with clean culture, appoint and to broadcast or other modes send communication with detection message.
Further, as shown in Figure 3, following flow process is arranged for other each maintaining end points (is example with second maintaining end point) that receive this first communication with detection message:
301, described second maintaining end point receives the first communication with detection message;
302, described second maintaining end point obtains the fault terminal point information from the described first communication with detection message, and this fault terminal point information may comprise the information of second maintaining end point, also may not comprise;
303, described second maintaining end point reports described fault terminal point information, as report the system manager of second maintaining end point, like this this system manager according to this fault terminal point information and equipment local preserve comprise the whole network all devices database of information, networking information, can orient the equipment that has fault in the network in real time comprehensively, and do further processing in view of the above.As, LB, LT handles, specifically be meant: in the 1AG agreement, comprise three kinds of messages: CCM message, LB message, LT message, the CCM message is used for detecting connectivity of link, and the LB message provides the function that is equivalent to PING, and the LT message provides the function that is equivalent to TRACE, be to come orientation problem in the 1AG agreement, therefore can handle the actual conditions of the equipment that has fault in the fixer network with LB, LT by LB message and LT message.
As shown in Figure 4, be a network system with 7 equipment.Comprise 7 equipment in this system, dispose MEP in 4 equipment, dispose in 3 equipment and safeguard that (Maintenance IntermediatePoint, MIP), each MEP connects and communication by corresponding MIP intermediate node.
Send the CCM message such as the periodic multicast of MEP1, these messages are through intermediary network device MIP, and MIP duplicates the CCM message of suitable number of times and transmits past different network branches according to forwarding strategy.Through repeatedly forwarding, final MEP2, MEP3 and MEP4 can both periodically receive the CCM message from MEP1.
Equally, MEP1 also can periodically receive from MEP2, the CCM message that MEP3 and MEP4 send.Occurred fault in network shown in Figure 4: single-channel fault (can receive message and can not send message) has appearred in two sections networks that connect MEP2 and MEP4 in the network, this moment, MEP2 and MEP4 and miss had this fault, still send the CCM message (still according to original CCM transmission cycle, in fact these messages since the single-channel fault of MEP in the single-pass network, in fact abandoned quietly) and receive CCM message from other MEP.
MEP1 has detected above-mentioned fault: MEP1 and has not received the CCM message that MEP2 and MEP4 send, and send all after dates at the CCM message that surpasses 3.5 times and also do not receive the CCM message that sends from MEP2 and MEP4, then MEP1 determines that fault has appearred in these two MEP, as not receiving CCM message from MEP2 because surpass 3.5 times of transmission cycles, the then overtime and alarm of report MEP2 in the MEP1 reporting information, the system manager of MEP1 suspects that at this moment fault has appearred in MEP2, so, initiate the LT test from MEP1 to MEP2, so, two MIP in the centre can produce response message to this LT, and transmission is not gone out but MEP2 can receive LT message response message.The result that system manager at the MEP1 place returns by observation concludes that fault has appearred in MEP2.To the detection of MEP4 in like manner.
After MEP1 determines that fault has appearred in MEP2 and MEP4, in the CCM message that after MEP1, sends, carry remote bug indication (Remote Defect Indication, RDI) (this identifies available 0 sign fault-free to sign, with 1 sign fault is arranged, can there be the fault recovery up to faulty equipment in this RDI sign always) and the MEP ID of MEP2 and MEP4 (as, MAC Address, IP address or other can unique this equipment of appointment the agreement relevant identifier), the simplification form of this CCM message is as shown in Figure 5.Wherein, " the Failed MEP TLV (MEP2ID) " in the CCM message and " Failed MEP TLV (MEP4ID) " have identified MEP2 and MEP4 fault respectively.Certainly, if this CCM message is not the CCM message that defines in the 802.1ag agreement,, the corresponding message of other protocol definitions indicates but then also can not comprising RDI.
Accordingly, the fault message that carries of the message of the CCM that sends of MEP3 is consistent with the fault message that MEP1 carries.MEP4 does not receive the CCM message of MEP2, can receive the CCM message of MEP1 and MEP3, therefore the CCM message of MEP4 has only carried the fault message (can infer that in like manner the CCM message that MEP2 sends only carries the fault message of MEP4) of MEP2, and the message format of its simplification as shown in Figure 6.Wherein, " the Failed MEP TLV (MEP2ID) " in the CCM message identified the MEP2 fault.
MEP2 receives the processing behind the CCM message: for MEP2, it can receive the CCM message from the form of MEP1 and MEP3 such as Fig. 5, also can receive from the form of MEP4 such as the CCM message of Fig. 6, and these messages have all indicated MEP2 fault to occur.MEP2 receives behind these CCM messages the fault information reporting in the message, as report the system manager, the system manager is by the comparative analysis to the CCM message that carries fault message, local CCM database and the networking situation that receive, the fault of certain form has appearred in the network that can judge the sending direction of MEP2, and then takes appropriate reclamation activities.
As, the system manager at the MEP2 place can receive the CCM message from MEP1, this CCM message carries the fault message that contains MEP2ID, after the system manager knows this information, generally, can attempt initiating the LT of MEP1 is tested at the MEP2 place.Because message sends and not go out, therefore two MIP and MEP1 do not have response message.According to this information, the system manager of MEP2 conclude problem go out MEP2 itself or with link that MEP2 links to each other on, after this, the system manager at MEP2 place can attempt solving this problem in two ends packet capturing that links to each other with MEP2 or equipment or the link of replacing fault.
The system manager who is in the MEP4 side equally also can infer that in conjunction with local CCM database the fault of certain form has appearred in the network of the sending direction of MEP4 according to the fault message that reports, and then takes appropriate reclamation activities.
In the technical scheme of present embodiment, when a certain maintaining end point is found faulty equipment is arranged, in the CCM message that sends thereafter, carry the fault terminal point information, make the recipient of CCM message to know that from this CCM message fault has taken place which equipment.Particularly take place to send fault when receiver equipment, but during just often situation of receiving function, this receiver equipment can report the information of faulty equipment.The system manager who obtains this receiver equipment that reports just can know in real time that fault has taken place this equipment, and handles according to fault.
As shown in Figure 7, composition schematic diagram for a kind of network system in the embodiment of the invention, described system comprises first maintaining end point 1 and second maintaining end point 2, described first maintaining end point 1 is used for detecting the maintaining end point that obtains breaking down according to the overtime situation of the communication with detection message of other maintaining end points transmissions of network system, generate and send the first communication with detection message to second maintaining end point 2, the described first communication with detection message comprises the fault terminal point information;
Described second maintaining end point 2 is used to receive the described first communication with detection message, obtains the fault terminal point information from the described first communication with detection message extraction, and reports described end points fault message.
Should be understood that: the network system of the embodiment of the invention may further include: safeguard intermediate node MIP, be used for according to the communication with detection message copy suitable number of times of forwarding strategy with reception, and transmit toward different network branches.Wherein, first maintaining end point 1 comprises:
Receiving element 10 is used for receiving the communication with detection message that the network maintaining end point sends;
Detecting unit 11, the overtime situation that is used for the communication with detection message sent according to the network maintaining end point detects the maintaining end point that obtains breaking down in the network;
Transmitting element 13 is used for sending the described first communication with detection message to each maintaining end point of network, and feasible each maintaining end point that receives the described first communication with detection message extracts the fault terminal point information and reports from the described first communication with detection message.
Under a kind of realization, this first communication with detection message comprises: fault terminal point information and in order to whether the remote bug Warning Mark of maintaining end point fault is arranged in the marked network; Described fault terminal point information comprises the maintaining end point sign of at least one fault; The sign of the maintaining end point of fault can be any one in the agreement relevant identifier of maintaining end point of MAC Address, IP address or the described fault of other unique identifications of the maintaining end point of described fault.
As shown in Figure 8, if comprise the end points fault message in the described communication with detection message that described receiving element 10 receives, first maintaining end point 1 can also comprise:
As shown in Figure 9, first maintaining end point 1 can also comprise:
Then, described detecting unit 11 is first detecting unit 110, is used for checking the record of described Database Unit 15, determines the maintaining end point of fault according to the time-out information that comprises in the record; The time-out information here can be overtime sign;
Perhaps, be used for checking the record of described Database Unit, determine the maintaining end point of fault according to described time-out information and the comparative result of preset threshold value time; The time-out information here can be time-out time.Should be understood that: by checking the record in the Database Unit 15,, and overtime sign put in this record if time-out time surpasses the preset threshold value time then is defined as the fault end points in the record.
Wherein, if described detecting unit 11 has detected a plurality of maintaining end point faults;
Then, described transmitting element 13 is first transmitting element 130, be used for when the transmission cycle arrives, each maintaining end point cycle sends described communication with detection message in network, described communication with detection message comprises remote bug Warning Mark and corresponding a plurality of maintaining end point signs, makes each maintaining end point that receives the described first communication with detection message extract maintaining end point from described communication with detection message and identifies and report.
Report the unit for not comprising among Fig. 9, and transmitting element is the situation of first transmitting element.In the embodiment shown in Fig. 9, also can comprise reporting the unit, not shown in the figures)
Second maintaining end point 2 also can have the composition similar to first maintaining end point, does not do herein and gives unnecessary details.
As shown in figure 10, be the schematic diagram of another specific embodiment of the maintaining end point among the present invention.Maintaining end point 3 in this example can have another kind of composition form, and it comprises: receiving element 31, Database Unit 33, generation transmitting element 35, regularly detecting unit 37.
In normal flow, receive direction (shown in heavy line among the figure), receiving element 31 is handled the CCM message that receives, if receive the CCM message that certain MEP sends for the first time, then store a newly-increased record in Database Unit 33, this record can comprise the sign of this MEP, the overtime sign (or time-out time) of message; If existing corresponding record, the time-out time of the relevant MEP that then in Database Unit 33, resets.
Above-mentioned record can be saved as the form of tables of data in Database Unit 33, as shown in table 1 as can store a table in as the MEP1 in the network system among Fig. 4, should be understood that: the overtime sign in this table also can be a time-out time.
Table 1:
| ??MEP?ID | ??MAC | The place interface | The MD rank | Overtime sign |
| ??2 | ??xx-xx-xx-xx | ?ethernet0 | ??5 | ??0 |
| ??3 | ??xx-xx-xx-xx | ?ethernet0 | ??5 | ??1 |
| ??4 | ??xx-xx-xx-xx | ?ethernet0 | ??5 | ??0 |
Wherein, usually overtime to be masked as 1 o'clock sign overtime, and then this table has reflected among the MEP1 and knows by detecting the CCM message, overtimely do not receive the CCM message that MEP3 sends.
Detection module 37 regularly, timing scan Database Unit 33 (shown in thick dashed line among the figure), when scanning at every turn according to timing to each MEP, increase progressively its time-out time.Send 3.5 times of cycle if the time-out time of finding certain MEP has surpassed the CCM of this MEP, indicate that then this MEP is overtime, as, revise the list item " overtime sign " in the table 1, and produce the information of this MEP fault, and send alarm to the system manager.
Generate and send unit 35, generate and cycle multicast transmission CCM message (shown in thick chain-dotted line among the figure), when sending the CCM message at every turn, check the CCM database earlier, see if there is overtime MEP and exist, promptly whether have fault MEP to exist, if have, the sign of the RDI in the CCM message that sends superset then, and the information of overtime MEP is added to the end of CCM message with the form of TLV, promptly in the CCM message, identified the information of fault MEP with the TLV form.
If receiving element 31 receives the CCM message that carries RDI sign and fault message, then with fault information reporting system manager (among the figure shown in the fine line).The system manager infers concrete faulty equipment and takes necessary recovery measure by the fault message and the information in the CCM database, the networking situation that report are compared.
In the technical scheme of present embodiment, when a certain maintaining end point is found faulty equipment is arranged, in the CCM message that sends thereafter, carried the fault terminal point information, make the recipient of CCM message to know that from this CCM message fault has taken place which equipment.Particularly take place to send fault when receiver equipment, but during just often situation of receiving function, comprise the fault terminal point information in the CCM message that this receiver equipment receives.Receiver equipment reports the fault terminal point information, and the system manager who then obtains this fault terminal point information that reports just can know in real time that the single channel fault has taken place this equipment, and recovers to handle according to fault.
Device embodiment described above only is schematic, wherein said unit as the separating component explanation can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, promptly can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of module to realize the purpose of present embodiment scheme according to the actual needs.Those of ordinary skills promptly can understand and implement under the situation of not paying performing creative labour.
Through the above description of the embodiments, those skilled in the art can be well understood to each execution mode and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware.Based on such understanding, the part that technique scheme contributes to prior art in essence in other words can embody with the form of software product, this computer software product can be stored in the computer-readable recording medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, perhaps network equipment etc.) carry out the described method of some part of each embodiment or embodiment.
Above-described execution mode does not constitute the qualification to this technical scheme protection range.Any at above-mentioned execution mode spirit and principle within done modification, be equal to and replace and improvement etc., all should be included within the protection range of this technical scheme.
Claims (9)
1. a fault detection method is characterized in that, described method comprises:
Current maintaining end point receives the communication with detection message that other maintaining end points are sent in the network, and the overtime situation that sends communication with detection message according to described other maintaining end points detects the maintaining end point that obtains breaking down;
Generate the first communication with detection message, the described first communication with detection message carries the fault terminal point information;
Other maintaining end points send the described first communication with detection message except that current maintaining end point in network, make other maintaining end points in the network extract the fault terminal point information from this first communication with detection message and report.
2. the method for claim 1 is characterized in that, the described first communication with detection message further comprises the remote bug Warning Mark;
Wherein, described fault terminal point information comprises the maintaining end point sign of at least one fault, and whether described remote bug Warning Mark is in order to there to be the maintaining end point fault in the marked network.
3. method as claimed in claim 2 is characterized in that, the agreement relevant identifier of the maintaining end point of the MAC Address of the maintaining end point that is designated described fault of the maintaining end point of described fault, IP address or the described fault of other unique identifications.
4. as each described method in the claim 1 to 3, it is characterized in that, described current maintaining end point receives the communication with detection message that other maintaining end points are sent in the network, and the overtime situation that sends the communication with detection message according to described other maintaining end points detects the maintaining end point that obtains breaking down and comprises:
Described current maintaining end point receives the communication with detection message that other maintaining end points periodically send in the network;
Surpass preset threshold value after the time, do not receiving the communication with detection message that other maintaining end points in the network sent according to the described cycle, then determining described other maintaining end point faults.
5. a communication equipment is characterized in that, described communication equipment comprises:
Receiving element is used for receiving the communication with detection message that the network maintaining end point sends;
Detecting unit, the overtime situation that is used for the communication with detection message sent according to the network maintaining end point detects the maintaining end point that obtains breaking down in the network;
Generation unit is used for generating the first communication with detection message according to the testing result of described detecting unit, comprises the fault terminal point information in the described first communication with detection message;
Transmitting element is used for sending the described first communication with detection message to each maintaining end point of network, and feasible each maintaining end point that receives the described first communication with detection message extracts the fault terminal point information and reports from the described first communication with detection message.
6. communication equipment as claimed in claim 5 is characterized in that, if comprise the end points fault message in the described communication with detection message that described receiving element receives, described communication equipment also comprises:
Report the unit, be used for extracting the fault terminal point information, described fault terminal point information is reported from the communication with detection message of described reception.
7. as claim 5 or 6 described communication equipments, it is characterized in that described communication equipment also comprises:
Database Unit is used to store the record that is associated with the communication with detection message of receiving, described record comprises the sign and the corresponding time-out information of the maintaining end point that sends communication with detection message;
Then, described detecting unit is first detecting unit, is used for checking the record of described Database Unit, determines the maintaining end point of fault according to the time-out information that comprises in the record; Perhaps, be used for checking the record of described Database Unit, determine the maintaining end point of fault according to described time-out information and the comparative result of preset threshold value time.
8. communication equipment as claimed in claim 5 is characterized in that, if described detecting unit has detected a plurality of maintaining end point faults;
Then, described transmitting element is first transmitting element, be used for when the transmission cycle arrives, each maintaining end point cycle sends described communication with detection message in network, described communication with detection message comprises remote bug Warning Mark and corresponding a plurality of maintaining end point signs, makes each maintaining end point that receives the described first communication with detection message extract maintaining end point from described communication with detection message and identifies and report.
9. network system, described system comprises first maintaining end point and second maintaining end point, it is characterized in that,
Described first maintaining end point, the overtime situation that is used for the communication with detection message that other maintaining end points according to network system send detects the maintaining end point that obtains breaking down, generate and send the first communication with detection message to second maintaining end point, the described first communication with detection message comprises the fault terminal point information;
Described second maintaining end point is used to receive the described first communication with detection message, obtains the fault terminal point information from the described first communication with detection message extraction, and reports described end points fault message.
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