WO2015149523A1 - Method and apparatus for rapid sending and detection processing of oam packet, and storage medium - Google Patents

Abstract

Disclosed is a method for rapid sending and detection processing of an operation, administration and maintenance (OAM) packet. An OAM session type is bidirectional forwarding detection (BFD) or a continuity check message (CCM). A network device stores sending parameters of a BFD packet and a CCM packet into a first random access memory (RAM) and stores detection parameters of the BFD packet and the CCM packet into a second RAM; a sending end of the network device determines a packet type according to the sending parameters and performs sending processing of the packet; and a detection end determines whether the packet arrives and performs corresponding detection processing according to the detection parameters. Also disclosed are an apparatus for sending and detection processing of a packet, and a storage medium. The apparatus comprises a packet sending module and a packet detection module.

Description

Method, device and storage medium for rapid transmission and detection processing of OAM message Technical field

The invention relates to the network operation, management & maintenance (OAM) technology, and particularly relates to a method, a device and a storage medium for quickly transmitting and detecting OAM messages.

Background technique

The OAM function has become very important in the public telecommunication network, especially for networks that need to provide service quality assurance. The OAM function performs real-time detection and status reporting of link status, performs link error management and provides fast switching capability. The OAM function can provide millisecond-level transmission and detection time, which speeds up network convergence, reduces application interruption time, and improves network reliability. The OAM function on the Ethernet switch is mainly implemented by two technologies: Bidirectional Forwarding Detection (BFD) and Connectivity Fault Management (CFM).

The BFD protocol provides a common, standardized media-independent and protocol-independent fast fault detection mechanism. BFD can quickly detect the fault of the bidirectional forwarding path between two network devices for each upper layer protocol, such as routing protocols and Multi-Protocol Label Switching (MPLS). The detection time reaches milliseconds.

CFM is a Layer 2 Ethernet OAM protocol defined by the IEEE 802.1ag standard. It can guarantee that Ethernet can also provide carrier-class requirements, including the ability to detect, recover, and manage network anomalies or abnormal problems such as downgrading and failure of some services. The Ethernet CCM packet is the most important one in the CFM packet. The detection terminal periodically sends CCM packets to advertise the connectivity of the peer link. It can also provide Remote Defect Indication (RDI).

In order to meet the requirements of fast transmission and fast detection of BFD and Ethernet CCM packets in an Ethernet switch device, the traditional device uses a multi-core CPU to specifically send and receive BFD or Ethernet CCM packets. A multi-core CPU is called a secondary CPU. The secondary CPU is used to encapsulate, send, receive, and decapsulate BFD or Ethernet CCM packets, implement packet statistics, and report detection events to the primary CPU. Nowadays, the session specifications of BFD and Ethernet CCM packets that need to be supported by 100G Ethernet switch devices are getting larger and larger. The current mainstream BFD sessions are 2K, and the local maintenance association End Point (LMEP) of the Ethernet CCM. The specification is 2K, and the Remote Maintenance Association End Point (RMEP) specification is 8K. For the implementation of the auxiliary CPU mode, the larger the session specification, the faster the CPU performance is degraded. It is difficult to satisfy the performance of 50ms failover for many time-sensitive services such as voice and video data. If you use a higher performance CPU, the cost and power consumption will be greatly improved. There is also a way to implement fast transmission and detection of BFD and Ethernet CCM messages by means of a Field Programmable Gate Array (FPGA). This method can meet the required performance of the device, but Still can't solve the problem of cost and power consumption. In addition, the traditional method is implemented separately for the transmission and detection of BFD and Ethernet CCM messages. Since BFD and Ethernet CCM transmission and detection functions may not be enabled in different network application scenarios, this Implementation will also cause idle and waste of resources.

It can be seen that the implementation of the transmission and detection processing of BFD and Ethernet CCM packets can not meet the requirements of Ethernet switch equipment without increasing cost and power consumption.

Summary of the invention

In order to solve the existing problems, the embodiments of the present invention are directed to a method, an apparatus, and a storage medium for rapidly transmitting and detecting OAM messages.

The technical solution of the embodiment of the present invention is implemented as follows:

The embodiment of the invention provides a method for rapidly transmitting and detecting OAM packets, OAM. The session type is BFD or CCM. The method includes: the network device stores the BFD packet and the CCM packet sending parameter in the first random access memory (RAM), and the BFD packet and the CCM packet. The detection parameters are stored in the second RAM;

The network device determines the packet type according to the sending parameter, and sends the packet to be processed;

The network device determines whether a message arrives, and performs corresponding detection processing according to the detection parameter.

The embodiment of the present invention further provides an apparatus for rapidly transmitting and detecting OAM messages, the apparatus comprising: a first random access memory (RAM), a second RAM, a message sending module, and a message detecting module;

a first RAM configured to store a transmission parameter of a bidirectional forwarding detection (BFD) packet and a connectivity detection information (CCM) packet;

a second RAM configured to store detection parameters of the BFD packet and the CCM packet;

The packet sending module is configured to determine a packet type according to the sending parameter, and send the packet to be processed;

The packet detection module is configured to determine whether a packet arrives, and perform corresponding detection processing according to the detection parameter.

The embodiment of the invention further provides a computer storage medium, wherein the computer program is stored therein, and the computer program is used to execute the method for quickly transmitting and detecting the OAM message.

A method, a device, and a storage medium for rapidly transmitting and detecting an OAM packet according to an embodiment of the present invention. The OAM session type is a BFD or a CCM, and the network device stores the transmission parameters of the BFD packet and the CCM packet to the first random. In the access memory (RAM, Random Access Memory), the detection parameters of the BFD message and the CCM message are stored in the second RAM, and the network device determines the message type according to the transmission parameter, and sends and processes the message according to whether there is The packet arrives to detect the packet; thus, the present invention is based on the BFD packet and the CCM packet. In the common point of the sending and detecting processes, the parameter resources related to the sending and detecting processes are shared, so that the network device can not only meet the performance requirements, but also save the device resources and reduce the performance when the user flexibly configures each session according to different application scenarios. Cost and power consumption.

DRAWINGS

FIG. 1 is a schematic flowchart of a method for sending and detecting a message according to an embodiment of the present invention;

2 is a schematic structural diagram of an apparatus for sending and detecting a message according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a packet sending module and a packet detecting module according to an embodiment of the present disclosure;

4 is a schematic diagram of a packet sending process according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of a packet detection process according to an embodiment of the present invention.

detailed description

In the embodiment of the present invention, the network device stores the sending parameters of the BFD packet and the CCM packet in the first RAM, and stores the detection parameters of the BFD packet and the CCM packet in the second RAM, and the network device according to the The sending parameter determines the type of the packet, and the packet is sent and processed, and the packet is detected and processed according to whether the packet arrives.

The invention will be further described in detail below with reference to the drawings and specific embodiments.

In order to implement the method provided by the present invention, when the session type is BFD, the network device needs to establish a session first, for example, establishing a BFD session between the first network device and the second network device; when the session type is CCM, the network The method for establishing a packet in a BFD session or a CCM session is performed by using the method provided by the embodiment of the present invention;

The embodiment of the invention provides a method for sending and detecting a message. The specific process is shown in Figure 1. The method mainly includes the following steps:

Step 101: The network device stores the transmission parameters of the bidirectional forwarding detection (BFD) message and the connectivity detection information (CCM) message into the first random access memory (RAM), and the BFD The detection parameters of the message and the CCM message are stored in the second RAM;

Specifically, the network device configures the interface to send the BFD packet and the CCM packet sending parameter of the user to the sending configuration entry of the first RAM. The sending parameter includes: the session number, the sending enable, and the sending parameter. Packet sending period, packet type, and packet length. In addition, the interface is configured to configure the packet information to the external DDR3 for the network device to read the packet. The storage space occupied by the packet is smaller. In the embodiment of the present invention, the off-chip DDR3 is used to store the message, thereby saving the internal storage space of the network device sending and detecting the processing chip, and reducing the cost of the chip;

The configuration interface may be a CPU interface, or may be a data configuration interface of other main processing chips;

For the BFD packet, the sending parameter further includes: a Diagnosing Code (Diag) field; the network device also writes the current time into the sending configuration entry as the sending time of the last packet;

The Diag field uses a binary number of 0-31 to represent the last session state of the sender network device;

Based on the implementation of the solution in the actual application, the number of configurations of the BFD packet and the CCM packet can be arbitrary, and the total number does not exceed the depth of the RAM in the network device, that is, the number of sent and configured packets does not exceed the depth of the first RAM. The number of detection configurations of the packet does not exceed the depth of the second RAM. It is not recommended to cross the transmission parameters of the BFD packet and the CCM packet. Therefore, the BFD packet and the CCM packet are configured in the DDR3. The starting address can be mapped to the session number one by one, and the same address does not correspond to different session numbers. In addition, the network device maintains a local timer for polling the network device to send configuration entries. Time base

The detection parameters of the BFD packet and the CCM packet are stored in the second RAM. The network device configures the interface to write the BFD packet and the CCM packet detection parameters. In the detection configuration entry of the second RAM, the current time is written in the configuration entry as the arrival time of the previous packet;

The detection parameters include: detection enable, packet detection period, and packet detection type;

As with the configuration of the above-mentioned transmission parameters, the detection parameters cannot be crossed during configuration; the timer of the local maintenance is also used to configure the timing of the configuration of the polling.

Step 102: The network device determines a packet type according to the sending parameter, and performs a sending process on the packet.

Specifically, the network device periodically polls the sending configuration entry of the first RAM, and when the sending enable is valid, calculates the difference between the current time of the timer and the sending time of the last packet, when the difference is greater than the report. When the packet is sent, the packet is configured as a sending instance. When the difference is smaller than the packet sending period, the packet is not processed, and the polling is continued.

For example, the network device periodically polls and sends each entry in the configuration entry. When the sending configuration in the sending configuration entry is valid, the packet sending period is 3.3 ms, the current time is 10.0 ms, and the last packet is sent. At 6ms, the difference is 4ms, and the difference is greater than the packet transmission period of 3.3ms. This means that the packet can be sent and sent, so it needs to form a transmission instance; if the last packet is sent for 8ms. , indicating that the polling operation of the next session is continued until the sending time is reached;

The component sending example is specifically: extracting the packet sending information according to the packet type, and updating the last sending time in the sending configuration entry to the current time;

The message sending information includes: a session number, a packet type, and a packet length;

For the BFD packet, the packet sending information further includes: a Diag field;

For example, if the packet is sent to the BFD, the session number, the packet type, the packet length, and the Diag field in the configuration entry are extracted as the packet sending information, and the configuration entry is sent. The sending time of the last message in the middle is updated to 0.1s in the current time, 0.3s;

After the sending of the sending instance, the packet is read, modified, and sent according to the message sending information;

The reading is specifically: obtaining a base address of the message stored in the DDR3 according to the session number, and obtaining all addresses starting from the base address of the message according to the packet length and the data bit width of the DDR3, Read the message;

For example, when the transmission parameter is configured, the storage space and the storage address occupied by the message information stored in the DDR3 corresponding to the session number in the transmission parameter are fixed. Therefore, the DDR3 report can be obtained according to the session number of the message. The base address of the file storage, such as the base address of the message storage is 0x0010, the length of the message is 128 bytes, and the data bit width of DDR3 is 128 bits. The storage address of the message in DDR3 is 0x0010 to 0x0017, and these storages are read. The content in the unit is the message;

The modification is specifically: reading the state of the corresponding session in the network device according to the packet type, and determining whether the modification is needed according to the state;

When the packet type is BFD, the status of the corresponding BFD session is read. When the status is the session interrupt, the replacement flag 1 is added to the packet.

When the packet type is CCM, the state of the corresponding CCM session is read, and when the state is a session interruption, a modification flag 1 is added to the packet;

For example, when configuring the sending parameters of each packet, one bit can be reserved as the modification flag bit. When the session state read in this step is a session interruption, the reserved modification flag bit is added with the flag 1; The modification flag may not be set in the sending parameter, may be added at the beginning or the end of the message, or may be stored in the network device in other manners, and is read when the message is sent and processed; The addition position is not limited, and the replacement mark may also be 0 or other mark, and the actual application is specifically set according to the application requirements;

The sending is specifically: when the packet type is BFD, and the replacement flag is 1, the Diag field in the packet is replaced with the Diag field in the packet sending information, and is sent according to the network device. The characteristics of the channel are assembled by sending the message into a prescribed format;

When the packet type is CCM and the modification flag is 1, the RDI field in the packet is replaced with 1, and the packet is assembled into a specified format according to the characteristics of the transmission channel of the network device;

The characteristic of the sending channel is a communication protocol established between network devices for sending a message;

The specified format is a message format specified in the foregoing communication protocol, specifically, a data format, an encoding rule, a data content, and the like;

For example, when the packet type is BFD, the replacement flag is 1, the Diag field in the packet is 0, and the Diag field in the packet transmission information is 1, the Diag field in the packet is replaced with 1, and then sent according to The characteristics of the channel are used to assemble the message into a specified format, for example, to transmit data of 1024 bits width according to the specified format.

Step 103: The network device performs corresponding detection processing according to whether a packet arrives at the packet;

Specifically, the network device determines whether a packet arrives, and sometimes, the packet is detected according to the packet type. When not, the network device periodically polls the second RAM detection configuration entry, when the detection is enabled. When valid, the time difference between the timer and the last packet arrival time is calculated. When the difference is greater than the packet detection period, it is determined that the session has a timeout interrupt, and the time in the update detection configuration entry is the current time. Generating interrupt information; when the difference is less than the message detection period, continuing the timing polling operation and determining whether a message arrives;

If the session is BFD, the timeout interrupt occurs. The Diag field needs to be recorded for the upper layer to read. If the session is CCM, the RDI state needs to be updated.

For example, the network device periodically polls and sends each entry in the configuration entry. When the sending configuration in the sending configuration entry is valid, the packet sending period is 3.3 ms, the current time is 10.0 ms, and the last packet is sent. At 6ms, the difference is 4ms, and the difference is greater than the packet transmission period of 3.3ms. This means that the packet can be sent and sent, so it needs to form a transmission instance; if the last packet is sent for 8ms. , indicating that the time of the next session has not been sent. Inquiry operation

When a packet arrives, the packet is detected according to the packet type and the session number in the packet. Specifically, when the packet type is BFD, the session number in the packet is extracted, and the session is read. The previous Diag field corresponding to the number compares the previous Diag field with the Diag field in the message. When the change is made, the session is interrupted, the current Diag field is recorded, and the interrupt information is generated and processed. , to determine that the session is not interrupted, update the arrival time of the last message as the current time;

The previous Diag field corresponding to the session number may be stored in the second RAM, or may be stored in other RAMs in the network device, and the designer selects a suitable storage unit according to specific scenarios and requirements;

For example, when the session number in the BFD packet is 01, the previous Diag field corresponding to the session 01 is 0, and the Diag field in the packet is 1. If the two are different, the session number 01 is interrupted.

When a packet arrives and the packet type is CCM, the session number in the packet is extracted, the previous RDI field corresponding to the session number is read, and the previous RDI field is compared with the RDI field in the packet. When there is a change, it is determined that the session is interrupted, the current RDI field is recorded, the RDI status counter is updated, and an interrupt information is generated. When there is no change, it is determined that the session is not interrupted, and the arrival time of the last message is updated to the current time, and the RDI is updated. Status counter; where

The previous RDI field corresponding to the session number may be stored in the second RAM, and may be stored in other RAMs of the network device, and the designer selects a suitable storage unit according to specific scenarios and requirements;

For example, when the session number in the CCM message is 11, the RDI field corresponding to the session 11 is read. If the value is 1, the RDI field in the message is 0, and the two are different.

The updating the RDI status counter in the detecting process is specifically: updating a corresponding entry in the fourth RAM for storing the RDI state; when detecting the timeout interrupt, adding 1 to the value in the corresponding entry according to the MAID index in the detection parameter; When receiving a CCM message, and determining that it is currently When the message is interrupted, the MAID of the corresponding entry in the fourth RAM is read according to the session number in the message, and the RDI entry is indexed by the MAID to determine whether the value in the RDI entry is 0. When it is 0, no action is made. Operation, when non-zero, the operation is decremented by 1;

The method for generating and detecting the message further includes: when the network device detects the processing of the packet, determines that the session is interrupted, generates the interrupt information, and stores the interrupt information in the third RAM of the network device for maintenance, and The interrupt information is reported to the upper device.

The device structure of the message sending and detecting process provided by the embodiment of the present invention is as shown in FIG. 2, and the device includes a first RAM 21, a second RAM 22, a message sending module 23, and a message detecting module 24;

The first RAM 21 is configured to store the sending parameters of the BFD packet and the CCM packet;

The second RAM 22 is configured to store detection parameters of the BFD packet and the CCM packet.

The packet sending module 23 is configured to determine a packet type according to the sending parameter, and send the packet to be processed;

The packet detecting module 24 is configured to determine whether a packet arrives, and perform corresponding detection processing according to the detection parameter;

The first RAM 21 and the second RAM 22 may be separately disposed in the network device, or may be the internal RAM of the network device processing chip, as long as the storage space is required;

The first RAM 21 is configured to write the BFD packet and the CCM packet sending parameter configured by the user into the sending configuration entry of the first RAM 21 through the configuration interface, and write the current time as the last packet sending time. Enter the sending configuration entry; where

The sending parameters include: a session number, a sending enable, a packet sending period, a packet type, and a packet length.

For the BFD packet, the sending parameter further includes: a Diagnose Code (Diag) field;

The second RAM 22 is configured to write the detection parameters of the BFD packet and the CCM packet configured by the user into the detection configuration entry of the second RAM 22 through the configuration interface, and the current time is Write the detection configuration entry as the arrival time of the last packet;

The detection parameters include: detection enable, packet detection period, and packet detection type;

In addition, the packet information is configured in the external DDR3 through the configuration interface, so that the network device can read the packet;

The configuration interface may be a CPU interface, or may be a data configuration interface of other main processing chips;

The packet sending module 23 and the packet detecting module 24 can be implemented by a processing chip in the network device; for example, can be implemented by a switch main chip in the network switch;

As shown in the schematic diagram of the packet sending module and the packet detecting module, the packet sending module 23 specifically includes: an information component module 31 and a packet sending preprocessing module 32;

The information component module 31 is configured to periodically poll the transmission configuration entry of the first RAM 21. When the transmission enable is valid, calculate the difference between the current time of the timer and the transmission time of the previous message, when the difference is When the packet is sent, the packet is sent to the packet sending pre-processing module 32. When the difference is smaller than the packet sending period, the packet is not processed, and the polling operation is continued.

The packet sending pre-processing module 32 is configured to read, modify, and send the packet according to the sending instance;

When the information component module 31 is configured as a sending instance, the specific configuration is to extract the packet sending information according to the packet type, and update the last sending time in the sending configuration entry to the current time;

The message sending information includes: a session number, a packet type, and a packet length;

For the BFD packet, the packet sending information further includes: a Diag field;

The packet sending pre-processing module 32 is configured to: when the packet is read according to the packet sending information, the packet is obtained according to the session number, and the packet is stored in a base address in the DDR3, and then according to the packet length and The data bit width of the DDR3 is obtained from all addresses from the base address of the message storage, and the message is read;

When the packet sending pre-processing module 32 modifies the packet, the configuration is to read the state of the corresponding session in the network device according to the packet type, and then determine whether the modification is needed according to the state;

When the packet type is BFD, the status of the corresponding BFD session is read. When the status is the session interrupt, the replacement flag 1 is added to the packet.

When the packet type is CCM, the state of the corresponding CCM session is read, and when the state is a session interruption, a modification flag 1 is added to the packet;

When the packet sending pre-processing module 32 sends the packet, the configuration is as follows: when the packet type is BFD, and the replacement flag is 1, the Diag field in the packet is replaced with the Diag in the packet sending information. Field, according to the characteristics of the transmission channel of the network device, the message is assembled into a prescribed format and sent out;

When the packet type is CCM and the modification flag is 1, the RDI field in the packet is replaced with 1, and the packet is assembled into a specified format according to the characteristics of the transmission channel of the network device;

The characteristic of the sending channel is a communication protocol established between the network devices and configured to send a message;

The specified format is a message format specified in the communication protocol, such as a data format, an encoding rule, a data content, and the like;

The packet detecting module 24 is configured to determine whether a packet arrives. Whenever, the packet is detected according to the packet type and the session number in the packet. When not, the second RAM 22 is periodically polled. The configuration entry is used to calculate the difference between the current value of the timer and the arrival time of the last packet when the detection is enabled. When the difference is greater than the packet detection period, it is determined that the session has a timeout interrupt, and the update detection configuration is updated. The time in the entry generates interrupt information; when the difference is not greater than the packet detection period, the timing polling operation is continued, and it is determined whether a packet arrives;

For a BFD packet, when the session is interrupted, the Diag field is changed for the packet to be sent. The module 32 reads; for the CCM message, when the session is interrupted, the RDI state is updated;

The packet detecting module 24, when a packet arrives and the packet type is BFD, is specifically configured to extract a session number in the packet, and read a previous Diag field corresponding to the session number, where the packet is detected. A Diag field is compared with the Diag field in the message. When the change is made, the session is interrupted, the current Diag field is recorded, and the interrupt information is generated. When there is no change, the session is determined to be uninterrupted, and the arrival time of the last message is updated. current time;

The packet detecting module 24, when a packet arrives and the packet type is CCM, is specifically configured to extract a session number in the packet, and read a previous RDI field corresponding to the session number, where the packet is detected. An RDI field is compared with the RDI field in the message. When there is a change, the session is interrupted, the current RDI field is recorded, the RDI status counter is updated, and the interrupt information is generated. When there is no change, the session is determined to be uninterrupted, and the update is last. The arrival time of the packet is the current time, and the RDI status counter is updated according to the MAID corresponding to the packet;

When the CCM session detects the timeout interrupt or receives the CCM message, the update RDI status counter in the above detection process is specifically: updating the corresponding entry of the fourth RAM for storing the RDI state; when detecting the timeout interrupt, according to the detection parameter The MAID index adds 1 to the value in the corresponding entry; when receiving the CCM message, reads the MAID of the corresponding entry in the fourth RAM according to the session number in the message, and uses the MAID to index the RDI entry to determine Whether the value in the RDI entry is 0. When it is 0, no operation is performed. When it is not 0, the value is decremented by 1;

The network device further includes an interrupt reporting module 25 and a third RAM 26;

The interrupt reporting module 25 is configured to, after the packet detecting module 24 generates the interrupt information, store the interrupt information in the third RAM 26 for maintenance, and report the interrupt information to the upper device;

The interrupt information includes: a session number, a packet type, and a session interruption type;

For the BFD session, the third RAM 26 stores the real-time session Down/Up status, Latch session Down/Up state, real-time Diag change state, latch Diag change state, and Diag field;

For the CCM session, the third RAM 26 stores the real-time session Down/Up state, the latched session Down/Up state, the real-time RDI change state, and the latched RDI change state; since the session data between the network devices is relatively large, for convenience For interrupt lookup, you can use the interrupt register of the interrupt area. For example, you can use 8 32-bit interrupt area indication registers to indicate the status of 0~8k-1 sessions. One bit in each register indicates 32 sessions. status.

FIG. 4 is a schematic flowchart of a packet sending process according to an embodiment of the present disclosure, which specifically includes the following steps:

Step 401: The first RAM 21 stores the sending parameters of the BFD packet and the CCM packet according to the configuration.

Specifically, the first RAM 21 writes the session number, the transmission enable, the packet sending period, the packet type, and the packet length configured by the user into the sending configuration entry of the first RAM 21 through the configuration interface; for the BFD packet, the sending The parameter further includes a Diag field; the current time is also written into the sending configuration entry as the sending time of the last packet;

In addition, the message information is stored in the external DDR3 through the configuration interface, so that the network device can read the message.

Step 402: The information component module 31 periodically polls to determine whether the transmission enable is valid, and whether the time exceeds the sending period;

Specifically, the information component module 31 periodically polls the transmission configuration entry of the first RAM 21, and when the transmission enable is valid, calculates the current time of the timer in the network device and the transmission time of the last message stored in the first RAM 21. If the difference is greater than the packet sending period in the sending parameter, step 403 is performed. When the difference is less than the packet sending period, the packet is not processed, and step 408 is performed.

Step 403: The information component module 31 extracts the packet sending information according to the packet type, and further The last packet transmission time in the new transmission configuration table;

Specifically, when the difference is greater than the packet sending period in step 402, the information component module 31 sends the packet sending information according to the packet type to the packet preprocessing module 32, and updates the sending configuration table in the first RAM 21. The last message sent in the item is the current time;

The message sending information includes: a session number, a packet type, and a packet length;

For BFD packets, the packet sending information also includes the Diag field.

Step 404: The packet sending and processing module 32 obtains the base address corresponding to the packet according to the packet sending information, and reads the packet.

Specifically, the message sending and processing module 32 can obtain the base address of the message stored in the DDR3 according to the session number in the message sending information, and obtain the message storage according to the packet length and the data bit width of the DDR3. All storage addresses from the base address, read the message;

For the BFD packet and the CCM packet, the specific reading method is the same; but the modification method is different, the BFD packet modification step 405, the CCM message modification step 406;

Step 405: The message sending and processing module 32 reads the session state, and determines whether to replace the Diag field in the packet.

Specifically, the packet sending pre-processing module 32 reads the status of the corresponding BFD session in the packet detecting module 24, and adds a replacement flag 1 to the packet when the state is a session interruption.

Step 406: The message sending and processing module 32 reads the session state, and determines whether to replace the RDI field in the packet.

Specifically, the packet sending pre-processing module 32 reads the status of the corresponding CCM session in the packet detecting module 24. When the status is a session interruption, the modification flag 1 is added to the packet.

Step 407: The message sending and processing module 32 assembles and sends the message according to the replacement flag.

Specifically, when the packet type is BFD and the replacement flag is 1, the packet sending pre-processing module 32 replaces the Diag field in the packet with the Diag field in the packet sending information, according to The characteristics of the transmission channel of the network device are assembled into a prescribed format and sent out;

When the packet type is CCM and the modification flag is 1, the packet sending pre-processing module 32 replaces the RDI field in the packet with 1, and assembles the packet into a prescribed format according to the characteristics of the transmission channel of the network device. .

Step 408: The information component module 31 continues the timed polling;

Specifically, the information component module 31 continues to periodically poll the transmission configuration entry of the first RAM 21, and when the transmission enable is valid, repeats the transmission step of FIG.

FIG. 5 is a schematic flowchart of a packet detection process according to an embodiment of the present invention, which specifically includes the following steps:

Step 501: The second RAM 22 stores detection parameters of the BFD packet and the CCM packet.

Specifically, the second RAM 22 writes the detection parameters of the BFD packet and the CCM packet configured by the user into the detection configuration entry of the second RAM 22 through the configuration interface, and writes the current time into the detection configuration entry as the previous report. Arrival time of the text;

The detection parameters include: detection enable, message detection period, and message detection type.

Step 502: The message detecting module 24 determines whether a message arrives.

Specifically, when a packet arrives, step 503 is performed. When no packet arrives, step 510 is performed.

Step 503: The packet detecting module 24 determines the packet type.

Specifically, when the packet type is BFD, step 504 is performed, and when the packet type is CCM, step 507 is performed.

Step 504: The message detecting module 24 determines whether the Diag field is changed.

Specifically, the packet detecting module 24 reads the session number in the packet, reads the previous Diag field corresponding to the session number, and compares the previous Diag field with the Diag field in the packet. Step 506 is executed, and when there is no change, step 505 is performed.

Step 505: The message detecting module 24 updates the time;

Specifically, when the Diag field is not changed, it is determined that the session is not interrupted, and the last packet arrival time is updated as the current time.

Step 506: The message detecting module 24 records the current Diag field, and generates an interrupt information.

Specifically, the packet detecting module 24 determines that the session is interrupted, and records the current Diag field in the detection configuration entry, and generates interrupt information including the session number, the packet type, and the session interrupt type, and sends the interrupt information to the interrupt reporting module 25.

Step 507: The message detecting module 24 determines whether the RDI field is changed.

Specifically, when the received packet type is CCM, the packet detecting module 24 extracts the session number in the packet, reads the previous RDI field corresponding to the session number, and uses the previous RDI field and the current packet. In the RDI field comparison, when there is a change, step 508 is performed, and when there is no change, step 509 is performed.

Step 508: The message detecting module 24 records the current RDI field, generates an interrupt information, and updates the RDI status counter.

Specifically, the packet detecting module 24 records the current RDI field, generates interrupt information including the session number, the packet type, and the session interrupt type, and sends the interrupt information to the interrupt reporting module 25, and updates the RDI status counter.

Step 509: The message detecting module 24 updates the time and updates the RDI status counter.

Specifically, the packet detecting module 24 updates the RDI status counter by updating the arrival time of the last packet in the configuration configuration entry to the current time.

Step 510: The packet detecting module 24 determines whether the packet sending period is exceeded.

Specifically, the packet detecting module 24 calculates a difference between the current value of the timer and the arrival time of the previous packet when the packet is not received. When the difference is greater than the packet detection period, step 511 is performed. When the difference is not greater than the packet detection period, step 512 is performed.

Step 511: The packet detecting module 24 updates the time and generates an interrupt information.

Specifically, the packet detecting module 24 detects the arrival time of the last packet in the configuration entry. The information is updated to the current time, and the interrupt information including the session number, the message type, and the session interrupt type is generated and sent to the interrupt reporting module 25.

Step 512: The message detecting module 24 continues to determine whether a message arrives.

The present invention is described in accordance with a flowchart, and/or block diagram of a method, apparatus (system), and computer program product for rapidly transmitting and detecting OAM messages according to an embodiment. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

Correspondingly, the embodiment of the present invention further implements a computer storage medium, wherein the computer program is stored therein, and the computer program is used to execute the method for quickly transmitting and detecting OAM messages in the foregoing embodiment.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in Within the scope of protection of the present invention.

Industrial applicability

It can be seen from the foregoing embodiment that the method for sending and detecting a message according to the present invention configures the sending parameters of the BFD message and the CCM message into the first RAM, and the BFD message and the CCM message are The detection parameter is configured in the second RAM, and the network device determines the packet type according to the sending parameter, sends a message to the packet, and then determines whether a packet arrives, and performs corresponding detection processing according to the detection parameter, so that the packet is reported. The parameters related to the sending and checking process can be used to share resources, so that the network device can flexibly configure the session in different scenarios, and at the same time meet the performance requirements, save resources, and reduce costs.

Claims (23)

1. An operation, management, and maintenance (OAM) message fast transmission and detection processing method, the OAM session type is bidirectional forwarding detection (BFD) or connectivity detection information (CCM), and the method further includes:

   The network device stores the transmission parameters of the BFD message and the CCM message in the first random access memory (RAM), and stores the detection parameters of the BFD message and the CCM message in the second RAM;

   The network device determines the packet type according to the sending parameter, and sends the packet to be processed;

   The network device determines whether a message arrives, and performs corresponding detection processing according to the detection parameter.
2. The method according to claim 1, wherein the method further comprises: the network device detecting the message, determining that the session is interrupted, and generating the interrupt information, storing the interrupt information in the third RAM for maintenance, And reporting the interrupt information to the upper device;

   The interrupt information includes: a session number, a message type, and a session interruption type.
3. The method of claim 2, wherein the network device stores the BFD packet and the CCM packet transmission parameter in the first RAM, the network device configures the BFD packet and the CCM packet configured by the user through the configuration interface. The sending parameters are written into the sending configuration entry of the first RAM; wherein

   The sending parameters include: a session number, a sending enable, a packet sending period, a packet type, and a packet length.

   For the BFD packet, the sending parameter further includes: a Diagnose Code (Diag) field.
4. The method according to claim 3, wherein when the transmission parameter is written in the first RAM, the current time is written in the transmission configuration table entry as the last message transmission time.
5. The method according to claim 4, wherein the storing the detection parameters of the BFD message and the CCM message in the second RAM is: the network device detects the BFD message and the CCM message configured by the user through the configuration interface. The parameter is written into the detection configuration entry of the second RAM; wherein

   The detection parameters include: detection enable, message detection period, and message detection type.
6. The method according to claim 5, wherein the method further comprises: writing the current time into the detection configuration table item when the detection parameter is written in the second RAM as the arrival of the last message time.
7. The method according to claim 6, wherein the determining the message type according to the sending parameter, and transmitting the message to: the network device periodically polling the sending configuration entry of the first RAM, when the sending enable is effective, The difference between the current time of the timer and the sending time of the previous packet is calculated. When the difference is greater than the packet sending period, the sending instance is formed. When the sending enable is invalid or the difference is smaller than the packet sending period. When the message is not processed, the timed polling operation is continued.
8. The method according to claim 7, wherein the composition sending example is: extracting the packet sending information according to the packet type, and updating the sending time of the last packet in the sending configuration entry to the current time;

   The message sending information includes: a session number, a packet type, and a packet length.

   For BFD packets, the packet sending information also includes the Diag field.
9. The method according to claim 8, wherein, after the sending of the sending instance, the method further comprises: reading, modifying, and transmitting the message according to the message sending information; wherein

   The reading is: obtaining a base address of the message stored in the double rate synchronous dynamic random access memory (DDR3) according to the session number, and obtaining the message storage according to the packet length and the data bit width of the DDR3. All addresses from the base address, read the message;

   The DDR3 is an external DDR3 for storing message information;

   The modification: reading the state of the corresponding session in the network device according to the packet type, and determining whether the modification is needed according to the state; wherein

   When the packet type is BFD, the status of the corresponding BFD session is read. When the status is the session interrupt, the replacement flag 1 is added to the packet.

   When the packet type is CCM, the state of the corresponding CCM session is read, and when the state is a session interruption, a modification flag 1 is added to the packet;

   The sending is: when the packet type is BFD, and the replacement flag is 1, the Diag field in the packet is replaced with the Diag field in the packet sending information, and the packet is sent according to the characteristics of the sending channel of the network device. Assembled into a prescribed format and sent out;

   When the packet type is CCM and the modification flag is 1, the RDI field in the packet is replaced with 1, and the packet is assembled into a specified format according to the characteristics of the transmission channel of the network device.
10. The method according to claim 2, wherein the network device determines whether a packet arrives, and performs corresponding detection processing according to the detection parameter: the network device determines whether a packet arrives, and sometimes, according to the packet type and The session number in the packet performs corresponding detection processing on the packet. When not, the network device periodically polls the detection configuration entry of the second RAM. When the detection is enabled, the current value of the timer and the previous report are When the difference is greater than the packet detection period, it is determined that the session has a timeout interrupt, and the time in the detection configuration entry is updated to the current time, and the interrupt information is generated; when the difference is smaller than During the message detection period, the timing polling operation is continued, and it is determined whether or not a message arrives.
11. The method according to claim 10, wherein, when a message arrives, the corresponding detection processing of the message according to the message type and the session number in the message is: when the message type is BFD, the report is extracted. The session number in the text reads the previous Diag field corresponding to the session number, compares the previous Diag field with the Diag field in the message, and when it changes, determines that the session is interrupted, and records the current Diag field. Interrupt information is generated and processed. When there is no change, it is determined that the session is not interrupted, and the arrival time of the last message is updated to the current time.
12. The method according to claim 11, wherein when a message arrives and the message type is CCM, the session number in the message is extracted, and the previous RDI word corresponding to the session number is read. Segment, comparing the previous RDI field with the RDI field in the message, when there is a change, determining that the session is interrupted, recording the current RDI field, updating the RDI status counter, generating an interrupt message, and determining the session when there is no change Without interruption, update the arrival time of the last message to the current time and update the RDI status counter.
13. An apparatus for operating, managing, and maintaining (OAM) message fast transmission and detection processing, the apparatus comprising: a first random access memory (RAM), a second RAM, a message sending module, and a message detecting module; ,

    a first RAM configured to store a transmission parameter of a bidirectional forwarding detection (BFD) packet and a connectivity detection information (CCM) packet;

    a second RAM configured to store detection parameters of the BFD packet and the CCM packet;

    The packet sending module is configured to determine a packet type according to the sending parameter, and send the packet to be processed;

    The packet detection module is configured to determine whether a packet arrives, and perform corresponding detection processing according to the detection parameter.
14. The apparatus according to claim 13, wherein said apparatus further comprises an interrupt reporting module and a third RAM;

    The interrupt reporting module is configured to, after the detecting module generates the interrupt information, store the interrupt information in the third RAM for maintenance, and report the interrupt information to the upper device;

    The interrupt information includes: a session number, a message type, and a session interruption type.
15. The device according to claim 14, wherein the first RAM is configured to write a BFD packet and a CCM packet transmission parameter configured by the user into a sending configuration entry of the first RAM through the configuration interface, and the current The time is also written into the sending configuration entry as the last packet sending time;

    The sending parameters include: a session number, a sending enable, a packet sending period, a packet type, and a packet length.

    For the BFD packet, the sending parameter further includes: a Diagnose Code (Diag) field.
16. The device of claim 15, wherein the second RAM is configured to write the BFD message and the CCM message detection parameter configured by the user into the detection configuration entry of the second RAM through the configuration interface, and the current Time is written in the detection configuration entry as the arrival time of the last packet;

    The detection parameters include: detection enable, message detection period, and message detection type.
17. The device according to claim 16, wherein the message sending module comprises: an information component module and a message sending preprocessing module; wherein

    The information component module is configured to periodically poll the sending configuration entry of the first RAM. When the sending enable is valid, calculate the difference between the current time of the timer and the sending time of the last packet, when the difference is greater than When the packet is sent, the packet is configured as a sending instance. When the difference is smaller than the packet sending period, the packet is not processed and the polling operation is continued.

    The packet sending pre-processing module is configured to read, modify, and send the packet according to the sending instance.
18. The device according to claim 17, wherein the information component module is configured to extract the packet sending information according to the packet type, and update the last sending time in the sending configuration entry to the current time; among them,

    The message sending information includes: a session number, a packet type, and a packet length.

    For BFD packets, the packet sending information also includes the Diag field.
19. The device according to claim 18, wherein the message sending and processing module is configured to store the message according to the session number and store the data at a double rate when the message is read according to the message sending information. Synchronizing the base address in the dynamic random access memory (DDR3), and then obtaining all the addresses from the base address of the message according to the packet length and the data bit width of the DDR3, and reading the message;

    The DDR3 is an external DDR3 for storing message information;

    When the packet sending pre-processing module modifies the packet, it is configured to read the state of the corresponding session in the network device according to the packet type, and then determine whether it needs to be modified according to the state;

    When the packet type is BFD, the status of the corresponding BFD session is read. When the status is the session interrupt, the replacement flag 1 is added to the packet.

    When the packet type is CCM, the state of the corresponding CCM session is read, and when the state is a session interruption, a modification flag 1 is added to the packet;

    The packet sending pre-processing module, when the packet is sent, is configured to replace the Diag field in the packet with the Diag field in the packet sending information when the packet type is BFD and the replacement flag is 1. The packets are assembled into a prescribed format according to the characteristics of the transmission channel of the network device;

    When the packet type is CCM and the modification flag is 1, the RDI field in the packet is replaced with 1, and the packet is assembled into a specified format according to the characteristics of the transmission channel of the network device.
20. The device according to claim 19, wherein the packet detecting module is configured to determine whether a packet arrives, and sometimes, according to the packet type and the session number in the packet, the packet is detected and processed accordingly. When not, periodically polling the detection configuration entry of the second RAM, when the detection enable is valid, calculating the difference between the current value of the timer and the arrival time of the previous packet, when the difference is greater than the packet detection During the period, it is determined that the session has a timeout interrupt, and an interrupt information is generated. When the difference is less than the packet detection period, the timing polling operation is continued, and it is determined whether a packet arrives.
21. The device according to claim 20, wherein, when a packet arrives and the packet type is BFD, the packet detecting module is configured to extract a session number in the packet, and read the corresponding session number. The previous Diag field compares the previous Diag field with the Diag field in the message. When the change is made, the session is interrupted, the current Diag field is recorded, and the interrupt information is generated. When there is no change, the session is determined to be uninterrupted. Update the arrival time of the last message as the current time.
22. The device according to claim 21, wherein, when a packet arrives and the packet type is CCM, the packet detecting module is configured to extract a session number in the packet, and read the corresponding session number. The last RDI field compares the previous RDI field with the RDI field in the message, and when there is a change, determines that the session is interrupted, records the current RDI field, generates an interrupt message, and when there is no change, determines that the session is not interrupted. Update the arrival time of the last message to the current time.
23. A computer storage medium, wherein a computer program for executing the method for quickly transmitting and detecting OAM messages according to any one of claims 1 to 12 is stored.

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