WO2012088910A1

WO2012088910A1 - Method and system for detecting connectivity fault

Info

Publication number: WO2012088910A1
Application number: PCT/CN2011/078980
Authority: WO
Inventors: 郁聪
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-12-30
Filing date: 2011-08-26
Publication date: 2012-07-05
Also published as: CN102055624A

Abstract

Disclosed are a method and system for detecting connectivity fault. The method comprises: sending CFM configuration information used for connectivity detection to a CFM function service board of a local end; the CFM function service board receiving, according to the configuration information, a CC message sent by a peer end; if the CFM function service board does not receive the CC message sent by the peer end in a predetermined period of time, the CFM function service board detecting that a connectivity fault exists between the local end and the peer end, and sending a detection result to a main control board of the local end. The present invention solves the problem of cost and resource waste caused by adopting high-performance single boards in a distributed switching system, thereby achieving the effect of reducing the device cost while effectively reducing the load of other single boards and improving the utilization of the device.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a connectivity fault detection method and system. BACKGROUND OF THE INVENTION The CFM function based on the IEEE 802. lag standard and ITU-T Y.1731 establishes an end-to-end Ethernet fault detection mechanism, and the shortest detection period can reach 3.3 ms, providing an easy and fast connectivity fault finding for the network. , detection and management functions.

The CFM functions specified in IEEE 802.1 ag and ITU-T Y.1731 include the CC (Continuity Check) function, the loopback (LB, Loopback) function, the link tracking (LT, Linktrace) function, and the packet loss measurement ( LM, Loss Measurement) function, delay measurement (DM, Delay Measurement) function, etc., CC function is the most basic and most important function of CFM function, which is the prerequisite for other functions to be realized. The CFM fault detection mechanism requires that the maintenance domain (MD, Maintenance Domains) and the corresponding maintenance association end point (MEP) of the same maintenance level be established on both ends of the link to be tested. After the CFM is enabled, the MEPs at both ends send CC messages (CCM, Continuity Check Message) according to the configuration period, and receive CCM from the peer end and perform corresponding judgment processing. If there is no 3.5 times period. If the CCM sent by the peer is received, the link is considered to be faulty. However, simply using the CPU to send and process CCM packets with a period of 3.3ms often causes the CPU to be busy and cannot handle other services. If multiple CC detection links are configured in the system, the system may not work. At present, the common practice is to implement fast CCM transmission and processing in hardware with high performance processors such as NP and FPGA. However, a distributed switch usually consists of a number of boards. The physical ports on the boards are connected to external devices. To ensure that each board can send and process fast CCMs, you need to use them on each board. High-performance hardware processors, which can result in increased equipment costs and wasted resources. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a connectivity fault detection method and system to solve the problem of cost and resource waste caused by using high-performance boards in a distributed switch system. According to an aspect of the present invention, a connectivity fault detection method is provided, which includes: transmitting CFM configuration information for connectivity detection to a CFM function service board of a local end; the CFM function service board receiving a pair according to the foregoing configuration information. The CC message sent by the terminal; if the CFM function service board does not receive the CC message sent by the peer end within a predetermined time, the CFM function service board detects the connectivity between the local end and the peer end. The fault is sent to the main control board of the local terminal. When the CFM function service board receives the CC message sent by the peer end according to the foregoing configuration information, the method further includes: sending, by the CFM function service board, the CC message to the opposite end according to the configuration information; The CC packet performs packet delay statistics and packet loss rate statistics. Before the CFM function service board receives the CC message sent by the peer end according to the configuration information, the CFM function service board of the local end is selected by the following steps: determining whether the current board receiving the message is a CFM function service board; if yes, The board that receives the current packet is configured as the CFM function service board of the local end; if not, the CFM function service board with the smallest slot number of the current CFM function service board is selected as the CFM function service board of the local end. Or, an online CFM function service board is specified as the CFM function service board of the local end. When the CFM function service board is offline, perform the steps of selecting the CFM function service board of the local device. The step of receiving, by the CFM function service board, the CC message sent by the peer end according to the configuration information includes: receiving the CC message, determining whether the received CC message is a CFM message, and if the CFM message is a CFM message, The received CC message is redirected to the CFM function service board. The CFM function service board receives the received CC message according to the configuration information. The above redirection rule is sent to each of the ports when the CFM configuration is performed, and the CFM function service board or the CFM function service board is placed on or off the line according to the user command. The step of receiving the CC message to determine whether the received CC message is a CFM message includes: the port matching the parameters of the received CC message, where the parameter includes at least one of the following: The protocol type, the VLAN ID, the physical port number, the MD level, and the OpCode. If the parameters of the received CC message are matched successfully, it is determined whether the received CC message is a CFM message. According to another aspect of the present invention, a connectivity fault detection system is provided, including: a CFM function service board, configured to receive CFM configuration information for connectivity detection, and receive a CC sent by a peer according to the foregoing configuration information. If the CC message sent by the peer end is not received within the predetermined time, the connection between the local end and the peer end is faulty; the main control board is configured to receive the CFM function service board. The test result sent. The CFM function service board is further configured to send a CC message to the peer end according to the configuration information, and perform packet delay statistics and packet loss rate statistics on the sent CC message. The main control board includes: a judging unit configured to: before the CFM function service board receives the CC message sent by the peer end according to the configuration information, determine whether the board that receives the current message is a CFM function service board; processing unit, setting When the board that receives the packet is the CFM function service board, the board that receives the current packet is configured as the CFM function service board of the local end; the board that receives the current packet is not the CFM. For the function of the service board, select the CFM function service board with the smallest slot number in the current CFM function service board as the CFM function service board of the local end, or specify an online CFM function service board as the above-mentioned one according to the user's instruction. The CFM function business board at the end. The physical port for transmitting and receiving CC packets is located on the CFM function card or the common interface card in the connectivity fault detection system. In the present invention, the CFM function service board is used to process fast CFM packets, which solves the problem that the common single-board CPU is difficult to implement the fast CFM function, and all the high-performance boards are used, which causes cost and resource waste, and thus achieves Effectively reduce the load on other boards, improve equipment utilization, and reduce equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a preferred flow chart of a connectivity fault detection method according to an embodiment of the present invention; FIG. 2 is a block diagram showing a preferred structure of a connectivity fault detection system according to an embodiment of the present invention; Another structural block diagram of a connectivity fault detection system according to an embodiment of the present invention; FIG. 4 is a flowchart of selection of a CFM function carrier board according to a connectivity fault detection method according to an embodiment of the present invention; FIG. Flowchart of the redirection filtering CFM message of the connectivity fault detection method. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings in conjunction with the embodiments. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Embodiment 1 FIG. 1 is a preferred flowchart of a connectivity fault detection method according to an embodiment of the present invention, which includes the following steps:

S102: Send CFM configuration information for connectivity detection to the local CFM function service board.

S104, the CFM function service board receives the CC message sent by the peer end according to the configuration information; S106, if the CFM function service board does not receive the CC message sent by the peer end within a predetermined time, The CFM function service board detects that the connectivity between the local end and the peer end is faulty, and sends the detection result to the main control board of the local end. Preferably, the main control board has a CPU processing unit. In the preferred embodiment, the CFM function service board is used to process fast CFM packets, which solves the problem of cost and resource waste caused by using high-performance boards to implement fast CC packet processing. Effectively reduce the load on other boards, improve equipment utilization, and reduce equipment costs. Preferably, when the CFM function service board receives the CC message sent by the peer end according to the configuration information, the connectivity fault detection method according to the embodiment of the present invention further includes: the CFM function service board according to the configuration information. Sending a CC message to the peer end; the CFM function service board performs packet delay statistics and packet loss rate statistics on the sent CC message. In the preferred embodiment, the CFM function service board of the local end can send a CC message to the CFM function service board of the peer end, so that the CFM function service board of the peer end can also determine whether the connection occurs according to the situation of receiving the CC message. Sexual failure. Preferably, before the CFM function service board receives the CC message sent by the peer end according to the configuration information, the CFM function service board of the local end is selected by the following steps: determining whether the current board receiving the message is a CFM function. The service board; if yes, the board that is currently receiving the packet is configured as the CFM function service board of the local end; if not, the CFM function service board with the smallest slot number of all the current CFM function service boards is selected. As the CFM function service board of the local end, an online CFM function service board is specified as the CFM function service board of the local end. In the preferred embodiment, the most suitable CFM function service board can be selected by the specific selection method described above. Preferably, when the CFM function service board is offline, the step of selecting the CFM function service board of the local end is performed. In the preferred embodiment, it is ensured that the new CFM function service board is continuously selected when the current CFM function service board is offline, and whether the CFM function service board needs to be updated when the new CFM function service is online is determined. Thereby ensuring the continuity of the business. Preferably, the step of the CFM function service board receiving the CC message sent by the peer end according to the configuration information includes: determining, by the port that receives the CC message, whether the received CC message is a CFM message; The CFM packet redirects the received CC message to the CFM function service board. The CFM function service board receives the received CC message according to the configuration information. In the preferred embodiment, the CC message is correctly identified and forwarded by the redirection mechanism. Preferably, the redirection rule is sent to each of the ports when performing CFM configuration, specifying a CFM function service board or a CFM function service board on or off according to a user instruction. In the preferred embodiment, the time points of the above-mentioned specific configuration redirection rules enable each port to efficiently receive and use the redirection rules. Preferably, the step of determining, by the port that receives the CC message, whether the received CC message is a CFM message comprises: the port matching the parameters of the received CC message, where the parameter includes the following At least one of the following: the protocol type of the packet, the VLAN ID, the physical port number, the MD level, and the OpCode. If the parameters of the received CC packet match, the CCC is determined to be CFM. Message. In the preferred embodiment, the CFM message can be effectively identified by the above specific judgment rule. Embodiment 2 FIG. 2 is a block diagram showing a preferred configuration of a connectivity fault detection system according to an embodiment of the present invention, which includes:

The CFM function service board 202 is configured to receive CFM configuration information for connectivity detection, and receive a CC message sent by the peer end according to the configuration information; if the CC message sent by the peer end is not received within a predetermined time If the connectivity between the local end and the peer end is faulty, the main control board 206 is configured to receive the detection result sent by the CFM function service board. In the preferred embodiment, the CFM function service board is used to process fast CFM packets, which solves the problem of cost and resource waste caused by using high-performance boards to implement fast CC packet processing. Effectively reduce the load on other boards, improve equipment utilization, and reduce equipment costs. Preferably, the connectivity fault detection system according to the embodiment of the present invention further includes: a common interface board 204, configured to provide a physical port for transmitting and receiving fast CC messages. Of course, the physical port is not limited to being located on the common interface board 204, and may also be located on the CFM function service board 202. Preferably, the CFM function service board 202 is further configured to organize a CC message according to the configuration information, and send the packet to the peer end through a real physical port, and perform packet delay statistics on the sent CC message. And packet loss rate statistics. Preferably, the physical port may be located on the CFM function service board 202 or on other common interface boards 204. Preferably, the main control board 206 may include: a determining unit, configured to determine whether the board currently receiving the message is a CFM before the CFM function service board receives the CC message sent by the opposite end according to the configuration information. a function service board, configured to: when the board that receives the current packet is the CFM function service board, set the board that currently receives the packet as the CFM function service board of the local end; When the board that receives the packet is not the CFM function service board, the CFM function service board with the smallest slot number of the current CFM function service board is selected as the CFM function service board of the local end, or An online CFM function service board is specified as the CFM function service board of the local end. In the preferred embodiment, the most suitable CFM function service board can be selected by the specific selection method described above. Preferably, when the CFM function service board is offline, the step of selecting the CFM function service board of the local end is performed. In the preferred embodiment, it is ensured that the new CFM function service board is continuously selected when the current CFM function service board is offline, and whether the CFM function service board needs to be updated when the new CFM function service is online is determined. Thereby ensuring the continuity of the business. Preferably, the step of the CFM function service board 202 receiving the CC message sent by the peer end according to the configuration information includes: determining, by the port that receives the CC message, whether the received CC message is a CFM message; For the CFM packet, the received CC message is redirected to the CFM function service board; the CFM function service board receives the received CC message according to the configuration information. In the preferred embodiment, the CC message is correctly identified and forwarded by the redirection mechanism. Preferably, the redirection rule is sent to each of the ports when performing CFM configuration, specifying a CFM function service board or a CFM function service board on or off according to a user instruction. In the preferred embodiment, the time points of the above-mentioned specific configuration redirection rules enable each port to efficiently receive and use the redirection rules. Preferably, the step of determining, by the port that receives the CC message, whether the received CC message is a CFM message according to the redirection rule comprises: the port matching the parameters of the received CC message, where The parameter includes at least one of the following: a protocol type of the packet, a VLAN ID, a physical port number, an MD level, and an OpCode. If the parameters of the received CC message match successfully, the received CC report is determined. Whether the text is a CFM message. In the preferred embodiment, the CFM message can be effectively identified by the above specific judgment rule. Embodiment 3 FIG. 3 is another structural block diagram of a connectivity fault detection system according to an embodiment of the present invention, including the following components: a main control board 302, a CFM function service board 304, and a common board 306. In the embodiment, the common board 306 is composed of a CPU 3061, a switch chip 3062, and a physical interface 3063, and can implement the LB and LT functions, and implement the slow CC function, the LB function, and the LT function.

The CPM function service board 304 includes: a CPU 3041, a switch chip 3042, a physical interface 3043, an OAM hardware module 3044, and an LM hardware module 3045. When the CFM function service board 304 is present, the CCM is redirected to the CFM function service board 304 to implement the CC. Function, and at the same time can realize LB function, LT function, LM function and DM function. The common board 306 is connected to the peer device through the high-speed backplane 308, that is, the CROSS-BAR. The device is connected to the peer device through the physical interface of the CFM function service board 304 and the ordinary board 306. In the connectivity fault detection system of this embodiment, one or two main control boards 302 must be included. If the two main control boards 302 are included, the main control and the standby main control are included, and one or A plurality of ordinary boards 306 and one or more pieces of CFM function service boards 304. In this embodiment, the main control board 302 is configured to send the CFM configuration to the common board 306 and the CFM function service board 304, and receive and process the echo information of the ordinary board 306 and the CFM function service board 304. Or alarm information. Based on the above-described connectivity failure detecting system, the connectivity failure detecting process of the system will be described below with reference to the drawings. In the preferred embodiment, if multiple CFM function service boards are set, the system supports dynamic selection of the CFM function service board, and the selection process may adopt the following strategies:

1. If the board where the specified port resides is the CFM function service board, select the board as the current CFM function carrier board.

2. If the board where the specified port is located is a normal board, determine whether the user has a static board configuration. If yes, select the board to be configured as the board. If there is no static configuration, select all current online. If the CFM function card is not available in the system, the carrier card of the CFM function is the smallest. 3. If the CFM function is serviced, the service will not be affected. The service will be re-selected for the service without the CFM function carrier in the system. The principle of 2 re-selects the carrier board of the current CFM function. Preferably, the selection of the CFM function service board can be completed by the main control board management module shown in Embodiment 3. FIG. 4 is a flowchart of selecting a CFM function carrier board according to a connectivity fault detection method according to an embodiment of the present invention, which includes the following steps:

5401. The main control board detects that there is a single on-board or off-line on the device by interrupting or polling.

5402, determining whether the board of the online or offline line is a CFM function service board, if not, executing step S406; if it is a CFM function service board, executing step S403;

5403, CFM function service is on-line. The service that has selected the effective carrier board will not be affected. The service that needs to be the carrier board but does not have a valid carrier board needs to re-select the carrier board. The CFM function service board is offline. All services need to be re-selected. Carrier board

5404, if the re-selection of the carrier board is the same, the service does not perform any operation, step 406 is performed, if not, step 405 is performed;

5405, notifying the redirection module to perform a redirection operation;

5406, The CFM function carrier board selection process ends. Embodiment 4 The preferred embodiment provides a connectivity fault detection system, which includes the following components: 1. An advanced service carrier board selection module, configured to dynamically select when a board is offline according to a carrier board selection rule. The CFM function carries the board, and notifies the following packet redirection module to deliver the corresponding packet redirection rule;

2. The packet redirection module is configured to perform the packet redirection rule when the CFM is configured or the board is re-determined, and the packets received by the board are filtered according to the rules, and the CFM packet is redirected to the bearer. Board or board CPU; 3. The OAM hardware module is located on the CFM function service board. It is set to send, receive, and process the CCM according to the configured packet sending period. At the same time, the corresponding alarm is reported to the CFM software module according to the detection result, and the CC function is completed.

4. The LM hardware module, which is located on the CFM function service board, is set to the number of packets and time statistics required to implement the LM and DM functions, and the number and time data when the LM and DM packets pass through the module. Fill in the corresponding fields of the message;

5, CFM software module, the module is located in the CPU of each function board, set to send CFM related configuration, receive and process various alarms reported by hardware, realize LB and LT functions, complete LM and DM function calculation work, In addition, the transmission and processing of the slow (transmission period Is and above) CCM is completed without the presence of the carrier board. In the preferred embodiment, the delivery of the redirection rule can be completed by the message redirection module, which is divided into two cases:

If the CFM function is not available in the system, the CFM function is used to send the redirection rule to each physical port of each function board. This rule matches the packet protocol type. All CFM packets are required. Send the CPU to the board;

2. If a CFM function carrier is available in the system, the CFM configuration in the CFM configuration is performed on the physical port of a function board. . The redirection rule to be delivered at this time needs to match the protocol type, VLAN ID, physical port number, MD level, and OpCode of the packet. After the match is successful, it is determined whether to redirect to the bearer or send the packet according to the OpCode value of the packet. The CPU of this board, OpCode is set to determine the function type of the CFM message. The value needs to comply with the IEEE 802. lag and ITU-T Y.1731. When the OpCode display message is CCM, it is redirected to the carrier board. Other CFM The packet is sent to the CPU of the board. In this embodiment, when the CFM function service board is deployed, the following rules are applied:

1. Down-type MEP processes CFM packets from the Ethernet interface and sends and receives packet redirection rules only on the bound ports.

2. The UP-type MEP processes the CFM packets from the bridge, and sends and removes the redirection rules on the ports other than the bound ports in the virtual local area network (VLAN).

3. When a port is added to or removed from the protected VLAN where the MEP is located, the redirection rule is added or deleted on the corresponding port according to 1 and 2. 4. When the protected VLAN where the MEP resides is deleted, the redirection rules sent and received on all ports in the VLAN are deleted. 5 is a flowchart of a redirection filtering CFM message according to the connectivity fault detection method according to an embodiment of the present invention. In this embodiment, after the CFM function is enabled, the physical port receives the CFM packet and sends it to the switch chip. The packet is processed by the LM hardware module on the CFM function service board. On the switch chip, the redirection module uses the redirection rule to match the packet and redirects the packet to the carrier board or the CPU of the local board. The specific process is as follows:

5501, the switch chip receives the packet sent from the physical port, and enters the redirection module for processing;

5502, if there is a CFM packet redirection rule in the redirection rule, if there is step S503, if not, step S504 is performed;

5503. The CFM packet redirection rule is used to match the packet to determine whether it is a CFM packet.

5504: If there is no CFM packet redirection rule or the content of the packet does not match the existing CFM redirection rule, there are two cases: if it is a non-CFM packet, go to the process corresponding to the packet type; If the CFM packet is not bound to the MEP or the local device is not configured with the CFM function, the CFM packet will be used as the Layer 2 packet forwarding process.

If the CFM function carrier is not available in the system, the CCM needs to be redirected to the carrier board. Other CFM packets are sent to the local device. Board CPU;

5506: Redirecting the CFM message to the OAM hardware module of the bearer board, where the OAM hardware module is obtained according to the slot number of the bearer board and the sub-interface number of the OAM hardware module.

5507, the message is sent to the CPU of the board, and the corresponding CFM function is completed by the CFM software module. In the preferred embodiment, the OAM hardware module primarily performs CC functions, including transmission, reception, and processing of the CCM. In this embodiment, the sending of the CCM includes: each local MEP saves a SndTimer table in the OAM module, and is set as a timer for periodically transmitting CCM messages. When the CC function is enabled, the SndTimer table is initialized according to the period and starts timing. When the time is up, the CCM is sent and the initial value is restored. When the message is sent, the CCM data is read from the CC message table corresponding to the local MEP, and the MEP ID and the message sequence number are filled in. The information is broadcasted in the protected VLAN of the corresponding MA. The CCM packet format satisfies the packet requirements defined in IEEE 802. lag or ITU-T Y1731.

CCM receiving and processing: After receiving the redirected CCM, the CCM is matched with the CC message table, and the corresponding connection status is detected according to the matching result: 1. If the remote MEP is not received within 3.5 times of the transmission period When the CCM message is received, the connectivity to the MEP is detected to be lost;

2. If the period and MEP ID in the CCM are inconsistent with the configuration, an incorrect CCM is detected;

3. If the MA ID in the CCM is inconsistent with the MA ID of the receiving MEP, the cross-connection is detected.

4. If the RDI field in the CCM is 1, a remote error alarm is detected. After the CCM packet is successfully matched, the information in the packet is updated to the remote MEP data table, and the double-ended LM function is set. In the preferred embodiment, the LM hardware module mainly performs the counting function of the LM function and the DM function specified in ITU-T Y1731. To complete the LM count, the statistics table with the VLAN ID as the index is stored in the hardware. As shown in Figure 4, it is set to record the number of LM packets of different maintenance domain levels in different VLANs received by the local device. When the LM packet passes, the LM hardware module fills in the corresponding field of the packet for the local device and the remote device to calculate. To complete the DM function, the system time is synchronized to the LM hardware module when the system is initialized or the system time is modified. The LM hardware module will time according to its inherent clock frequency, and its accuracy can reach 8ns. When the DM packet passes, the LM hardware module fills in the corresponding field of the packet for use by the local device and the remote device for calculation.

The CFM software module is located in the CPU of each function board. The module saves the entries corresponding to the above hardware modules, and is set to complete the CFM configuration delivery, LB function, LT function, LM and DM function statistics, and CFM does not exist in the system. Slow CC function when functioning the board. When the LB function is enabled, the CFM software module sends or receives LB messages (LBM, LB Message) and LB recovery messages (LBR, LB Reply). The processing is in accordance with IEEE 802. lag and ITU-T Y1731. When the LT function is enabled, the CFM software module sends or receives LT messages (LTM, LT Message) and LT recovery messages (LTR, LT Reply), which are processed in accordance with IEEE 802. lag and ITU-T Yl 731. When the LM function is enabled, for the dual-end LM, the CFM software module periodically takes data from the remote MEP data table in the OAM hardware module and calculates the statistical result. For the single-ended LM, the CFM software module periodically sends or receives the LM. The message (LMM, LM Message) and the LM recovery message (LMR, LM Reply), and calculate the statistical result according to the data in the LMR, the above process conforms to the provisions of ITU-T Y1731; when the DM function is enabled, the CFM software module The DM packet is sent and received periodically, and the DM statistics are calculated according to the timestamp carried in the DM packet. The process is in accordance with the provisions of ITU-T Y1731. When the CFM function carrier does not exist in the system, it is sent periodically by the CFM software module. And receiving CCM, this process is similar to the OAM hardware module and conforms to IEEE 802. lag or ITU-T Y1731. From the above description, it can be seen that the present invention achieves the following technical effects:

1. Implemented the CC function, LB function, LT function, LM function, and DM function specified by IEEE 802. lag and ITU-T Y.1731; 2. LM and DM functions are only supported on the CFM service board, and all other functions are supported. Supported by the board, supports single-ended LM and dual-end LM on the CFM service board, and supports one-way DM and two-way DM;

3. Each switch supports at least 16 MDs specified by IEEE 802.1ag and ITU-T Y1731. Each MD supports at least 32 MAs. Each MA supports at least 512 MEPs. The whole machine supports at least 8K MEPs. 4 Each switch supports eight levels (0-7) of MDs, belonging to users, service providers, and operations.

00ms, ls, 10s, 60s, 600s, in this scheme and system, the CCM with a transmission period less than Is is called fast CCM, and the CCM with a transmission period of Is and above is a slow CCM. The present invention adopts a solution that uses a carrier board to process a fast CFM message CCM, and solves the problem that a common single-board CPU is difficult to implement a fast CFM function, and all high-performance boards are used, which causes cost and resource waste, and thus achieves It can effectively reduce the load on other boards and increase the utilization rate of equipment while reducing the cost of equipment. At the same time, the invention also combines the hardware and the software, the hardware counts and marks the data, and the software takes the data statistics manner, and processes the sending and receiving of the packets with the time stamp or the number of the packets, and realizes the packet delay statistics ( DM) and packet loss rate statistics (LM) capabilities. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A connectivity fault detection method, including:

Sending the CFM configuration information for the connectivity detection to the CFM function service board of the local end; the CFM function service board receives the CC message sent by the peer end according to the configuration information; if the CFM function service board is within a predetermined time If the CC message sent by the peer end is not received, the CFM function service board detects that the connectivity between the local end and the peer end is faulty, and sends the detection result to the local end. Control board.

The method according to claim 1, wherein, when the CFM function service board receives the CC message sent by the peer end according to the configuration information, the method further includes:

The CFM function service board sends a CC message to the peer according to the configuration information. The CFM function service board performs packet delay statistics and packet loss rate statistics on the sent CC message.

The method according to claim 1, wherein before the CFM function service board receives the CC message sent by the peer end according to the configuration information, the CFM function service board of the local end is selected by the following steps:

Determine whether the board that receives the current packet is a CFM function service board.

If yes, the board that is currently receiving the packet is configured as the CFM function service board of the local end; if not, the CFM function service board with the smallest slot number in all the online CFM function service boards is selected as the The CFM function service board of the local end, or an online CFM function service board is specified as the CFM function service board of the local end.

4. The method according to claim 3, wherein the step of selecting the CFM function service board of the local end is performed when the CFM function service board is offline.

The method according to claim 1, wherein the step of receiving, by the CFM function service board, the CC message sent by the opposite end according to the configuration information comprises:

The port that receives the CC message determines whether the received CC message is a CFM message; if it is a CFM message, redirects the received CC message to the CFM function service board; The function service board receives the received CC message according to the configuration information.

The method according to claim 5, wherein the redirection rule is sent to each of the ports when performing CFM configuration, specifying a CFM function service board or a CFM function service board on or off according to a user instruction.

The method according to claim 5, wherein the step of determining, by the port that receives the CC message, whether the received CC message is a CFM message comprises:

The port matches the parameters of the received CC packet, where the parameter includes at least one of the following: a protocol type, a VLAN ID, a physical port number, an MD level, and an OpCode of the packet; If the parameters of the CC message are successfully matched, it is determined whether the received CC message is a CFM message.

8. A connectivity fault detection system, comprising:

The CFM function service board is configured to receive the CFM configuration information for the connectivity detection, and receive the CC message sent by the peer end according to the configuration information; if the CC message sent by the peer end is not received within the predetermined time, And detecting that the connectivity between the local end and the opposite end is faulty;

The main control board is configured to receive the detection result sent by the CFM function service board.

The system according to claim 8, wherein the CFM function service board is further configured to send a CC message to the opposite end according to the configuration information, and perform packet delay statistics on the sent CC message. Packet loss rate statistics.

10. The system according to claim 8, wherein the main control board comprises:

The determining unit is configured to determine, before the CFM function service board receives the CC message sent by the peer end according to the configuration information, whether the board that receives the current message is a CFM function service board;

The processing unit is configured to: when the board that is currently receiving the packet is the CFM function service board, set the board that is currently receiving the packet to the CFM function service board of the local end; If the board of the packet is not the CFM function service board, select the CFM function service board with the smallest slot number in the current CFM function service board as the CFM function service board of the local end, or follow the user's instructions. An online CFM function service board is specified as the CFM function service board of the local end.

The system according to claim 8, wherein the physical port that is configured to quickly send and receive the CC message is located on the CFM function service board, or a common interface board located in the connectivity fault detection system. on.