CN101035028A - Access error detection method and network device - Google Patents
Access error detection method and network device Download PDFInfo
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Abstract
This invention discloses the fault detection methods, including: ATM inverse multiplexing group sent in the field of end-to-end channel carrying byte ATM inverse multiplexing control management cell, which covers the ATM inverse multiplexing in the group receiving end-to-end channel field carrying byte ATM - to reuse control management cell, if the period of bytes received and transmitted described in the same byte, and / or if the period of bytes received and transmitted bytes referred not the same, and above ATM inverse multiplexing group of different physical link interface is not receiving the same byte, asynchronous detected above - inverse multiplexing transmission model group exists fault. Accordingly, the present invention further discloses the realization of the network fault detection equipment. This technology is based on ATM inverse multiplexing control protocol letter yuan, detection ATM inverse multiplexing to the wrong group of fault.
Description
Technical field
The present invention relates to the network measuring technology, relate in particular to asynchronous transfer mode inverse multiplexing group fault detection methods and realize the network equipment that wrong detects.
Background technology
If the network equipment adopts asynchronous transfer mode (Asynchronous Transfer Mode, ATM) carry out work, transmitting terminal and receiving terminal use asynchronous transfer mode inverse multiplexing usually, and (InverseMultiplexing for ATM, IMA) technology communicates.The IMA technology is used very extensive, such as, (Interface between the RNC and the Node B IUB) can use the IMA technology to carry out transfer of data to the interface of base station and base station controller.
Please refer to Fig. 1, be IMA group work schematic diagram.The IMA group is synthesized the virtual link that can carry upper-layer service for some physical links by certain rule set.The operation principle of IMA group is as follows, receives cell flow from the ATM layer at transmitting terminal, and cell flow is distributed on the different physical link of this IMA group; At receiving terminal, IMA recovers original atm cell stream with same sequence from physical link, and gives the ATM layer and be further processed.Two IMA groups of transmitting-receiving each other have many physical links usually and link to each other, a physical link interface of a corresponding IMA group of physical link.As can be seen from Figure 1, IMA group A links to each other by 3 physical links with IMA group B, for ease of understanding, the transfer of data of an interface is divided into reception and transmission, under the normal situation, the reception of the transmission corresponding interface B1 of interface A1, the transmission of the reception corresponding interface B1 of interface A1.According to different service needed, a network equipment can be set up a plurality of IMA groups.
IMA organizes typical misconnection type three kinds: IMA group interior section link loopback abbreviates the link loopback as in this specification; IMA group of local terminal and opposite end a plurality of IMA group butt joint abbreviate a winding as and organize more in this specification; The transmitting-receiving connection of the physical link interface of IMA group does not match, and abbreviates the transmitting-receiving connection in this specification as and does not match.
Please refer to Fig. 2, be the pattern test schematic diagram of prior art IMA group.Local terminal IMA group at first activates the pattern test function, and by the IMA Control Protocol cell, on physical link interface, test pattern is sent to the opposite end therein; In order to reach the purpose of detection, test pattern should remain unchanged in once testing.This test pattern is caught in the opposite end after receiving test pattern, on the physical link interface that links to each other with local terminal, this test pattern is sent it back local terminal.Local terminal after starting the pattern test, will be on all physics LI(link interface)s the acceptance test pattern, whether the test pattern that relatively receives consistent with the test pattern of transmission; If local terminal IMA group has been received test pattern at the physical link interface that links to each other with the opposite end, and the test pattern of receiving is consistent with the test pattern of transmission, it is normal to illustrate that the link that starts the pattern test sends, and the link that receives test pattern receives normal.
From above-mentioned prior art as can be seen to the detection scheme of misconnection fault, local terminal at first sends test pattern, the opposite end sends it back local terminal after receiving this pattern, by judging whether local terminal physical link port receives test pattern, whether whether identical with the test pattern that sends with the test pattern that receives, it is normal to analyze physical link with this; The scheme that this wrong detects realizes detecting the wrong fault of IMA based on the pattern test function of IMA.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides the fault detection methods and the network equipment, to realize detecting the wrong fault of asynchronous transfer mode inverse multiplexing group.
For solving the problems of the technologies described above, the purpose of the embodiment of the invention is achieved through the following technical solutions:
A kind of fault detection methods comprises: the asynchronous transfer mode inverse multiplexing group is sent in the asynchronous transfer mode inverse multiplexing control and management cell that carries byte in the end-to-end passage field; The asynchronous transfer mode inverse multiplexing group of received is carried the asynchronous transfer mode inverse multiplexing control and management cell of byte in end-to-end passage field; If the byte that receives is identical with the byte of transmission, then detect the asynchronous transfer mode inverse multiplexing group and have fault, if and/or the byte of byte that receives and transmission is inequality, and the byte that the different physical link interfaces of asynchronous transfer mode inverse multiplexing group receive is inequality, then detects the asynchronous transfer mode inverse multiplexing group and has fault.
A kind of network equipment of realizing that wrong detects comprises: the cell transmitting element, and the asynchronous transfer mode inverse multiplexing group that is used for the network equipment is sent in the asynchronous transfer mode inverse multiplexing control and management cell that end-to-end passage field is carried byte; The cell receiving element is used for the asynchronous transfer mode inverse multiplexing group of received is carried byte in end-to-end passage field asynchronous transfer mode inverse multiplexing control and management cell; Fault detection unit is used for detecting whether have fault, if the byte that receives is identical with the byte of transmission, then detects the asynchronous transfer mode inverse multiplexing group and has fault; If and/or the byte of byte that receives and transmission is inequality, and the byte that the different physical link interfaces of asynchronous transfer mode inverse multiplexing group receive is inequality, then detects the asynchronous transfer mode inverse multiplexing group and has fault.
As can be seen from the above technical solutions, in embodiments of the present invention, the asynchronous transfer mode inverse multiplexing group is sent in the asynchronous transfer mode inverse multiplexing control and management cell that carries byte in the end-to-end passage field, the asynchronous transfer mode inverse multiplexing group of received is carried the asynchronous transfer mode inverse multiplexing control and management cell of byte in end-to-end passage field, if the byte that receives is identical with the byte of transmission, if and/or the byte of byte that receives and transmission is inequality, and the byte that the different physical link interfaces of asynchronous transfer mode inverse multiplexing group receive is inequality, then detects the asynchronous transfer mode inverse multiplexing group and has fault; The technical program realizes detecting the wrong fault of asynchronous transfer mode inverse multiplexing group based on asynchronous transfer mode inverse multiplexing control protocol cell.
Description of drawings
Fig. 1 is the work schematic diagram of prior art IMA group;
Fig. 2 is the pattern test schematic diagram of prior art IMA group;
Fig. 3 is the method flow diagram of the embodiment of the invention;
Fig. 4 is the link loopback schematic diagram of prior art IMA group;
Fig. 5 organizes schematic diagram for a winding of prior art IMA group more;
Fig. 6 connects the schematic diagram that do not match for the transmitting-receiving of prior art IMA group;
Fig. 7 is a prior art E1 frame format schematic diagram;
Fig. 8 is the network equipment schematic diagram of the embodiment of the invention.
Embodiment
The embodiment of the invention provides fault detection methods and realizes the network equipment that wrong detects, and by the byte in the end-to-end passage field of asynchronous transfer mode inverse multiplexing control protocol cell, detects the link loopback and a winding is organized more; Further, by the far-end faulty indication of PDH (Pseudo-synchronous Digital Hierarchy), detect the transmitting-receiving connection and do not match.The asynchronous transfer mode inverse multiplexing group of local terminal is sent in the asynchronous transfer mode inverse multiplexing control and management cell that carries byte in the end-to-end passage field to the opposite end, after after a while, this asynchronous transfer mode inverse multiplexing group of received of local terminal is carried the asynchronous transfer mode inverse multiplexing control and management cell of byte in end-to-end passage field; If the byte that receives is identical with the byte of transmission, then detect this asynchronous transfer mode inverse multiplexing group and have the link loopback, if the byte that receives and the byte of transmission are inequality, and the byte that the different physical link interfaces of asynchronous transfer mode inverse multiplexing group receive is inequality, then detects this asynchronous transfer mode inverse multiplexing group and exists a winding to organize more.The physical link interface of asynchronous transfer mode inverse multiplexing group sends unusual PDH (Pseudo-synchronous Digital Hierarchy) frame, judge whether this physical link interface receives the far-end faulty indication of PDH (Pseudo-synchronous Digital Hierarchy) frame, if not, then detecting the asynchronous transfer mode inverse multiplexing group exists the transmitting-receiving connection not match.
Please refer to Fig. 3, be the method flow diagram of the embodiment of the invention.
For convenience of control and management to IMA, defined a kind of special cell at ima protocol, this cell is called as IMA Control Protocol (IMA Control Protocol, ICP) cell, the control and the state information that have comprised each physical link interface and IMA group in the icp cell, in case IMA is set up upright, transmitting terminal will periodically send icp cell.Comprise 53 bytes in the icp cell, table 1 is the structure of this cell:
| The byte sequence number | The field implication |
| 1-5 | Header |
| 6 | The operational administrative label |
| 7 | Sequence of cells number and link index numbers |
| 8 | The ima frame sequence number |
| 9 | The icp cell skew |
| 10 | Link is filled indication |
| 11 | State and control information change indication |
| 12 | IMA group index number |
| 13 | Group state and control information |
| 14 | Transmit timing information |
| 15 | Send test control |
| 16 | The test pattern that this link sends |
| 17 | The test pattern that this link receives |
| 18-49 | The State Control information of link 0-link 31 |
| 50 | Undefined |
| 51 | End-to-end passage |
| 52-53 | Crc error control |
Table 1
In the normal transmission of IMA, the configuration parameter that carries in the icp cell can connect in order to the both sides that guarantee interconnection, this just requires IMA to organize in the icp cell that sends on all physics LI(link interface)s, the configuration parameter of the group of carrying must be consistent, and the configuration parameter of identified group and link is being set up and be constant when maintenance is connected.
In the present embodiment, the end-to-end passage field that sends of the local terminal byte of carrying is regularly to generate and be updated in the random digit of the 51st byte location of icp cell; IMA group has a plurality of physical link interfaces, and the random digit that belongs in the end-to-end passage field of icp cell that the physical link port of same IMA group sends is identical.When implementing the technical program, local terminal is sent in the icp cell that carries byte in the end-to-end passage field to the opposite end; The opposite end is sent in the icp cell that carries byte in the end-to-end passage field to local terminal, and the byte that the opposite end sends also is a random digit, and the random digit of icp cell in end-to-end passage field that whole physical link interfaces of the same IMA group in opposite end send is identical.
For comparison in the byte that realizes 303 pairs of transmissions of following steps and reception, after writing down the byte of end-to-end passage field in the icp cell when local terminal sends icp cell, through certain time length, just the minute book termination is received the byte in the end-to-end passage field of icp cell, this duration can be adjusted as the case may be, needs to guarantee that this duration comes and goes required maximum time greater than icp cell between local terminal and opposite end.
In the present embodiment, the end-to-end passage field that sends of the opposite end byte of carrying is regularly to generate and be updated in the random digit of the 51st byte location of icp cell.
If the byte of step 303. local terminal IMA group of received is identical with the byte of transmission, then detects the IMA group and have the link loopback.Concrete, the byte that receives when certain physical link interface is identical with the byte of transmission, illustrates that there is the link loopback in this physical link interface of IMA group.
Please refer to Fig. 4, be IMA group link loopback schematic diagram.The link loopback here is: handling through opposite end IMA group, reconsolidate to before the original atm cell stream, any local terminal physical link interface that can make sends data and the identical situation of reception data, when there is the loopback link in local terminal physics LI(link interface), what this interface received is the icp cell that local terminal oneself sends, and other does not have that the physical link interface of link loopback receives is the icp cell of opposite end, and interface A1 has constituted loopback among Fig. 4.
Byte by on the end-to-end passage field that receives on the contrast interface just can detect this physical link and whether have the link loopback.Table 2 record be the example of the byte that receives of 3 physical link interfaces of local terminal:
| The random digit that sends | | | | |
| The byte that receive the first time | 0x1 | 0x1 | 0x2 | 0x2 |
| The byte that receive the second time | 0x20 | 0x20 | 0x3 | 0x3 |
| The byte of Jie Shouing for the third time | 0x15 | 0x15 | 0xee | 0xee |
Table 2
As can be seen from Table 2, the byte that physical link 1 interface receives for 3 times is all identical with the random digit that sends, and illustrates that there is the link loopback in physical link 1 interface.
Because end-to-end channel word segment length is 8 bits, the probability that interconnection both sides' IMA group has sent identical random digit just is roughly 1/2
8, need to get rid of some special numbers in actual the use, so probability is slightly larger than this value; Chong Tu probability is little in theory, can satisfy the test needs.But for precision that improves detection and the influence of avoiding other accidentalia, continuous 3 times detection is carried out in suggestion, to determine last result.Continuous 3 butt joint both sides use the probability of same random number word just in end-to-end passage field probably be 1/2
24Thereby smoothly test result improves reliability.
If the byte that step 304. receives and the byte of transmission are inequality, and the byte that different physical link interface receives is inequality, then detect existence one winding and organize more.
Please refer to Fig. 5, organize schematic diagram more for IMA organizes a winding.When there is the situation of the many groups of a winding in an IMA group, this IMA group can be received the icp cell of a plurality of IMA groups in opposite end simultaneously, in Fig. 5, what receive on the interface A1 of IMA group A is the icp cell that carries IMA group B parameter, and what receive on interface A2 and the interface A3 is the icp cell that carries IMA group C parameter.Because ima protocol need guarantee to connect the parameter uniqueness of both sides IMA group, one winding will cause for many groups reporting LIF (fault warning of IMA isl frame step-out) after the startup of IMA group, as can be seen from Figure 5, IMA group B and IMA group C receive only the ATM cell of the IMA group A of part, these ATM cell can't be reduced into correct cell flow, may cause the upper-layer service bandwidth to reduce even service disconnection.
In the present embodiment, whether whether the IMA of local terminal group is identical by the byte of judging different physical link interfaces and receiving in end-to-end passage field, exist a winding to organize to analyze more.Table 3 record be the example of the byte that receives of 3 physical link interfaces of local terminal:
| | | | |
| The byte that receive the first time | 0x1 | 0x2 | 0x2 |
| The byte that receive the second time | 0x20 | 0x3 | 0x3 |
| The byte of Jie Shouing for the third time | 0x15 | 0xee | 0xee |
Table 3
As can be seen from Table 3, the byte that physical link 1 interface receives is different from other physical link interface, illustrates to exist a winding to organize more.For avoiding the influence of other accidentalia, continuous 3 times detection is carried out in suggestion, to determine last result.
Need to prove that step 304 is on the byte of byte that receives and transmission basis inequality, promptly do not exist under the situation of link loopback, the comparison that the byte that different physical link interfaces are received is carried out.If there is the physical link interface of link loopback in local terminal, then when judging whether to exist the fault of the many groups of a winding, exist byte that the physical link interface of link loopback receives not as the foundation of judging; Such as, if IMA group has 3 links, having analyzed physical link 1 interface in step 303 is the link loopback, then in step 304, only relatively whether the byte received of physical link 2 interfaces and physical link 3 interfaces is identical.
Further, the technical program can also be analyzed the number of the opposite end IMA group of this IMA group connection.This IMA group has a plurality of physical link interfaces, and each interface receives a byte, at first the reception byte identical with sending byte is deleted, and then identical byte is divided into a class, and the number of the class of division equals the number that this IMA group may connect the IMA group.
The physical link interface of step 305.IMA group sends unusual PDH frame.
Please refer to Fig. 6, for the transmitting-receiving of IMA group connects the schematic diagram that do not match.As can be seen from Figure 6, the transmission of the interface A1 of IMA group A links to each other with the reception of the interface B1 of IMA group B, but the reception of the interface A1 of IMA group A but links to each other with the transmission that IMA organizes the interface B2 of B.When connection does not match, the signal on the link, frame format all with normal condition under as broad as long, link may not can produce alarm, but can't finish upper-layer service transmission.In the present embodiment, step 305 and step 306 cooperate, and (Plesiochronous Digital Hierarchy, (Remote DefectIndicate RDI) detects this misconnection fault to far-end faulty indication PDH) to use PDH (Pseudo-synchronous Digital Hierarchy).
In the ITU-T agreement, the structure relevant to the various transmission systems of PDH defines, and wherein defined RDI, when receiving terminal receives unusual PDH frame, by RDI notice transmitting terminal.For making receiving terminal feedback RDI, at first need and send unusual PDH frame at the transmitting terminal structure.
Below be example with the frame format of E1 (2048k/bps pulse modulation code communication system), illustrate that utilizing RDI to judge whether to exist transmitting-receiving to connect does not match.Please refer to Fig. 7, be E1 frame format schematic diagram.Wherein, and the even pulse modulation code (Pulse Code modulation, PCM) 0 time slot of frame is fixed as X0011011, the 2nd bit of 0 time slot of odd number PCM frame is fixed as 1, the 3rd bit is the A bit, and in order to expression far-end faulty indication, the 4-8 bit is as idle bit, the 1st bit is the X bit, its meaning of X bit is that when not using the CRC multi-frame, the X bit uses as international bit, when using the CRC multi-frame structure, the X bit is as the multi-frame check word.
After certain physics LI(link interface) of transmitting terminal sends unusual PDH frame, if can't detect the structure of this frame at receiving terminal, then the A bit is put 1, receive unusual with sign, if and this RDI is fed back to that this physical link interface of transmitting terminal received in the A bit position is 1 PCM frame, the transmission that this link is described is consistent with reception, otherwise, illustrate that the transmitting-receiving connection of this link does not match.Being understandable that certain physical link interface is not received RDI after sending unusual PDH frame, may be that link transmit-receive does not match and causes RDI to be sent to other physical link interface, also may be that equipment or line fault cause RDI to lose; This step is mainly used in judges the unmatched problem of transmitting-receiving, and historical facts or anecdotes is executed before the step 305, needs assurance equipment not have fault warning.
For example, physical link 1 port in local terminal IMA group sends unusual PDH frame, if physical link 2 ports of local terminal IMA group receive the RDI of feedback, illustrate that misconnection has taken place for physical link 2 ports and physical link 1 port, be understandable that, misconnection may be that local terminal causes, also may be that the opposite end causes.
In the present embodiment, detect following 3 class misconnection faults set by step successively: detect the link loopback, the many groups of a winding are connected with transmitting-receiving and do not match.It is pointed out that in the technical program the detection of this 3 class wrong fault is separate, can arrange their priority detection order, also can only test wherein 1 class fault or 2 class faults according to actual needs according to actual conditions.
Please refer to Fig. 8, be the network equipment schematic diagram of the embodiment of the invention.This network equipment 800 comprises:
Abnormal frame transmitting element 804 is used to produce unusual PDH (Pseudo-synchronous Digital Hierarchy) frame, and sends unusual PDH (Pseudo-synchronous Digital Hierarchy) frame at the physical link interface of asynchronous transfer mode inverse multiplexing group;
Connect the detecting unit 805 that do not match, be used to judge whether the physical link interface receives the far-end faulty indication of PDH (Pseudo-synchronous Digital Hierarchy) frame, if not, then detect the asynchronous transfer mode inverse multiplexing group and exist the transmitting-receiving connection not match.
Wherein, above-mentioned byte is a random digit.
Wherein, if the byte that receives is identical with the byte of transmission, fault detection unit 803 detected faults are the link loopback.
Wherein, if the byte of byte that receives and transmission is inequality, and the byte that the different physical link interfaces of asynchronous transfer mode inverse multiplexing group receive is inequality, and fault detection unit 803 detected faults are that a winding is organized more.
The asynchronous transfer mode inverse multiplexing group of the network equipment 800 is sent in the asynchronous transfer mode inverse multiplexing control and management cell that carries byte in the end-to-end passage field by cell transmitting element 801.This byte is a random digit.This asynchronous transfer mode inverse multiplexing group is received in the asynchronous transfer mode inverse multiplexing control and management cell that carries byte in the end-to-end passage field by cell receiving element 802.Fault detection unit 803 detects whether there is fault; If the byte that receives is identical with the byte of transmission, then detects the asynchronous transfer mode inverse multiplexing group and have the link loopback; If the byte that receives and the byte of transmission are inequality, and the byte that the different physical link interfaces of asynchronous transfer mode inverse multiplexing group receive is inequality, then detects the asynchronous transfer mode inverse multiplexing group and exists a winding to organize more.Abnormal frame transmitting element 804 produces unusual PDH (Pseudo-synchronous Digital Hierarchy) frame, and sends unusual PDH (Pseudo-synchronous Digital Hierarchy) frame at the physical link interface of asynchronous transfer mode inverse multiplexing group; Connect the detecting unit 805 that do not match, judge whether the physical link interface receives the far-end faulty indication of PDH (Pseudo-synchronous Digital Hierarchy) frame, if not, then detect the asynchronous transfer mode inverse multiplexing group and exist the transmitting-receiving connection not match.The network equipment 800 can detect following 3 class misconnection faults: detect the link loopback, the many groups of a winding do not match with receiving and dispatching to be connected; The detection that it is pointed out that this 3 class wrong fault is separate.
From the foregoing description as can be seen, the technical program realizes detecting the wrong fault of asynchronous transfer mode inverse multiplexing group based on asynchronous transfer mode inverse multiplexing control protocol cell.The technical program detects the fault of the many groups of a link loopback and a winding by the test byte of the end-to-end passage field carrying of existing icp cell; Further, by the far-end faulty indication of PDH frame, detect the transmitting-receiving connection and do not match.
More than the fault detection methods and the network equipment that the embodiment of the invention provided are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a fault detection methods is characterized in that, comprising:
The asynchronous transfer mode inverse multiplexing group is sent in the asynchronous transfer mode inverse multiplexing control and management cell that carries byte in the end-to-end passage field;
Described asynchronous transfer mode inverse multiplexing group of received is carried the asynchronous transfer mode inverse multiplexing control and management cell of byte in end-to-end passage field;
If the byte of described reception is identical with the byte of described transmission, then detects described asynchronous transfer mode inverse multiplexing group and have fault; If and/or the byte of the byte of described reception and described transmission is inequality, and the byte that the different physical link interfaces of described asynchronous transfer mode inverse multiplexing group receive is inequality, then detects described asynchronous transfer mode inverse multiplexing group and has fault.
2. method according to claim 1 is characterized in that, if the byte of described reception is identical with the byte of described transmission, described detected fault is the link loopback.
3. method according to claim 1, it is characterized in that, if the byte of the byte of described reception and described transmission is inequality, and the byte that the different physical link interfaces of described asynchronous transfer mode inverse multiplexing group receive is inequality, and described detected fault is that a winding is organized more.
4. method according to claim 1 is characterized in that, described byte is a random digit.
5. according to one of them described method of claim 1 to 4, it is characterized in that, further comprise:
The physical link interface of described asynchronous transfer mode inverse multiplexing group sends unusual PDH (Pseudo-synchronous Digital Hierarchy) frame, judge whether described physical link interface receives the far-end faulty indication of PDH (Pseudo-synchronous Digital Hierarchy) frame, if not, then detecting described asynchronous transfer mode inverse multiplexing group exists the transmitting-receiving connection not match.
6. a network equipment of realizing that wrong detects is characterized in that, comprising:
The cell transmitting element, the asynchronous transfer mode inverse multiplexing group that is used for the described network equipment is sent in the asynchronous transfer mode inverse multiplexing control and management cell that end-to-end passage field is carried byte;
The cell receiving element is used for described asynchronous transfer mode inverse multiplexing group of received is carried byte in end-to-end passage field asynchronous transfer mode inverse multiplexing control and management cell;
Fault detection unit is used for detecting whether have fault; If the byte of described reception is identical with the byte of described transmission, then detects described asynchronous transfer mode inverse multiplexing group and have fault; If and/or the byte of the byte of described reception and described transmission is inequality, and the byte that the different physical link interfaces of described asynchronous transfer mode inverse multiplexing group receive is inequality, then detects described asynchronous transfer mode inverse multiplexing group and has fault.
7. the network equipment according to claim 6 is characterized in that, if the byte of described reception is identical with the byte of described transmission, the detected fault of described fault detection unit is the link loopback.
8. the network equipment according to claim 6, it is characterized in that, if the byte of the byte of described reception and described transmission is inequality, and the byte that the different physical link interfaces of described asynchronous transfer mode inverse multiplexing group receive is inequality, and the detected fault of described fault detection unit is that a winding is organized more.
9. the network equipment according to claim 6 is characterized in that, described byte is a random digit.
10. according to one of them described network equipment of claim 6 to 9, it is characterized in that, further comprise:
The abnormal frame transmitting element is used to produce unusual PDH (Pseudo-synchronous Digital Hierarchy) frame, and sends described unusual PDH (Pseudo-synchronous Digital Hierarchy) frame at the physical link interface of described asynchronous transfer mode inverse multiplexing group,
Connect the detecting unit that do not match, be used to judge whether described physical link interface receives the far-end faulty indication of PDH (Pseudo-synchronous Digital Hierarchy) frame, if not, then detect described asynchronous transfer mode inverse multiplexing group and exist the transmitting-receiving connection not match.
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| CN111200544B (en) * | 2020-03-23 | 2022-04-26 | 北京信而泰科技股份有限公司 | Network port flow testing method and device |
| CN117527637A (en) * | 2023-12-29 | 2024-02-06 | 摩尔线程智能科技(北京)有限责任公司 | Method and device for detecting link failure, storage medium and electronic equipment |
| CN117527637B (en) * | 2023-12-29 | 2024-04-02 | 摩尔线程智能科技(北京)有限责任公司 | Method and device for detecting link failure, storage medium and electronic equipment |
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