CN102820980B - A kind of device and method of transmitting order to lower levels - Google Patents

Abstract

The invention discloses a device and method for issuing commands, including: a sending device and a receiving device, wherein: the sending device is used to establish a connection with a target device, and sends a command group to the target device independently of the receiving device; It is independent of the sending means to receive the return information sent by the target device. The present invention adopts the method of sending commands asynchronously. On the one hand, it can greatly increase the speed of sending commands, and give full play to the potential of the equipment, so as to achieve the performance index that cannot be achieved by sending synchronously; It is judged that the receiving device listens in a blocking manner, and can interact flexibly with the calling device, which can greatly improve the delivery efficiency.

Description

A device and method for issuing commands

technical field

The invention relates to network device management technology, in particular to a device and method for issuing commands.

Background technique

With the number of network devices increasing geometrically and the network structure becoming more and more complex, it is no longer possible to manage the network solely by manual work. Therefore, the network management system plays a pivotal role in today's network management solutions. Network operators and Enterprise-level users have more and more demands on network management systems.

In the network management system, the mainstream method is to use SNMP (Simple Network Management Protocol) for network management, but in many cases it is impossible or inconvenient to use the SNMP protocol, such as managing devices from different manufacturers or managing devices that do not provide SNMP management functions, etc. , you need to use command line interface (CLI) commands to operate the device, so as to achieve the purpose of management.

IP network devices with management functions basically use the Telnet or SSH protocol to issue CLI commands, and the CLI commands issued in the background generally adopt a synchronous method, that is, send a command to the device and wait for all devices to return results, although this method is simple. , easy to control, but there are problems such as slow command sending speed and inflexible interaction with the device.

Contents of the invention

The technical problem to be solved by the present invention is to provide a device and a method for sending commands, which can realize efficient and flexible sending of commands to devices.

In order to solve the above technical problems, a device for issuing commands in the present invention includes: a sending device and a receiving device, wherein:

a sending device, configured to establish a connection with the target device, and send a command group to the target device independently of the receiving device;

The receiving means is used for receiving the return information sent by the target device independently of the sending means.

Further, the sending device is also used to add a start flag command and an end flag command to the command group;

The receiving device is also used to accumulate the received return information of the target device, divide the accumulated return information based on the command group according to the start flag command and the end flag command in the return information, and establish a relationship between the return information and the command group corresponding relationship.

Further, it also includes a result organizing device;

The receiving device is also used to send the return information divided based on the command group to the result grouping device;

The result grouping device is used for determining the execution result of each command in the command group from the return information divided based on the command group.

Further, a fault retransmission device is also included;

The fault retransmission device is used to detect the status of the sending device sending the command group and the receiving device receiving the returned information. When an abnormality occurs, disconnect the sending device from the target device, notify the target device to log in again, and find the fault point command. The state of the sending device falls back to the point of failure command.

Further, the receiving device divides the accumulated return information based on the command group according to the start mark command and the end mark command. Search for the end mark command, if found, establish the corresponding relationship between the return information between the start mark command and the end mark command and the command group number.

Further, the process of determining the execution result of each command in the command group by the result assembling device from the returned information based on the command group is that the result assembling device obtains the corresponding command group according to the command group number, and converts the command group The command is matched in the corresponding return information, the return information of the command is determined, and the execution result of each command is judged according to the feature information.

Further, a method for issuing commands includes:

The sending device establishes a connection with the target device, and sends the command group to the target device independently of the receiving device;

The receiving means and the sending means independently receive the return information sent by the target device.

Further, it also includes:

The sending device adds a start mark command and an end mark command to the command group before sending the command group to the target device;

After receiving the return information, the receiving device accumulates the received return information of the target device, divides the accumulated return information based on the command group according to the start flag command and the end flag command in the return information, and establishes the return information and Correspondence between command groups.

Further, it also includes:

After the receiving device divides the accumulated return information based on the command group, it sends the return information divided based on the command group to the result grouping device;

The result composing device determines the execution result of each command in the command group from the return information divided based on the command group.

Further, it also includes:

The fault retransmission device detects the status of the sending device and the receiving device during the process of the sending device sending the command group and the receiving device receiving the returned information. When an abnormality occurs, the sending device is disconnected from the target device, and the target device is notified to log in again. And search for the fault point command, and return the state of the sending device to the fault point command.

To sum up, the present invention adopts the method of sending commands asynchronously. On the one hand, it can greatly increase the speed of sending commands, and fully utilize the potential of the equipment, so as to achieve the performance index that cannot be achieved by sending synchronously; on the other hand, due to the synchronous When sending a command to receive information, it is necessary to judge the end flag of the returned information, but the end flag is ever-changing, so it is not flexible enough, especially in the scene where interaction confirmation with the device is required, the synchronous method is often difficult to handle, and the asynchronous method does not need to return the end of the information For flag judgment, the receiving device listens in a blocking manner, and can interact flexibly with the calling device. The present invention can meet the occasions where the command delivery speed is relatively high. If a large number of commands need to be issued and the equipment is relatively stable, the delivery efficiency can be greatly improved; in addition, when the command delivery process is relatively complicated, such as in When performing file operations on the device, there may be multiple uncertain confirmations and feedbacks in the middle, so the flexibility of the asynchronous method can be better reflected.

Description of drawings

Fig. 1 is the architectural diagram of the equipment of issuing order of the present invention;

Fig. 2 is a flow chart of the command sent by the sending device in the present invention;

Fig. 3 is the flow chart of receiving the returned information by the receiving device in the present invention;

Fig. 4 is the flow chart of the grouping return information of the result grouping device in the present invention;

Fig. 5 is a flow chart of the failure retransmission performed by the failure retransmission device in the present invention.

Detailed ways

In this implementation mode, in consideration of the slow speed of the synchronous delivery of commands currently adopted and the inflexible interaction with the device, the process of sending commands and the process of receiving returned information are separated, and the sending device focuses on sending commands , the receiving device focuses on receiving the returned information, which improves the efficiency of command delivery; in addition, the receiving device does not need to judge the end sign of the returned information, but only judges the characteristics of the returned information, and the interaction with the device is more flexible.

In this embodiment, when issuing a command, the sending device establishes a connection with the target device and logs in. After the login is successful, it sends a command group (numbered before sending) to the target device. After the target device processes the command, it sends the return information to The receiving device performs grouping processing on the received returned information, and transmits the grouped results to the result grouping device for analysis to form the data structure required by the calling device. When a connection failure occurs during the sending or receiving process, the sending device or the receiving device will start the fault retransmission device, and the fault retransmission device determines the command group to be resent according to the fault point.

As shown in Figure 1, the device for issuing commands in this embodiment includes: a sending device, a receiving device, a fault retransmission device and a result grouping device, wherein:

The sending device is used for sending CLI commands to the device, including device login, command number, sending command and command cache maintenance.

The receiving device is used to receive the returned information from the target device, including filtering of returned character strings and receiving timeout control.

The fault retransmission device is used to detect the connection status of the equipment, determine the fault point, and resend the fault point and the sent commands after the fault point. All connection exceptions in the process are detected and the command sending point is rolled back.

The result assembling device is used to realize assembling the received returned information into a certain data structure for use by the calling device.

The method for issuing an order in this embodiment includes the following steps:

Step A: Determine the target device to which the command is to be sent, and the command group to be sent;

Step B: Establish a connection with the target device and log in. If the receiving device is not started, it needs to be started, and the command group is numbered, and the start mark command and the end mark command are added to the command group;

Step C: Add the numbered command groups into the command cache and issue them one by one, the start flag command is issued first, and the end flag command is issued last;

Step D: After the receiving device is started, it receives the return information of the target device in a blocking manner;

Step E: The failure retransmission device detects failures in the process of sending commands and receiving returned information in real time;

Step E: After detecting the fault, the fault retransmission device disconnects the current faulty connection, and then re-connects and logs in. After the login is successful, it extracts the command group that needs to be resent from the command cache according to the fault point, and sends it;

If the failure retransmission device does not receive the return information within the receiving delay set by the receiving device, it will prompt that the receiving is completed or the timeout is abnormal.

Step F: the receiving device accumulates the return information of the target device in order, divides the return information according to the start mark command and the end mark command, and hands the divided return information to the result assembly device to construct the result data structure, After the build is successful, the callback invokes the device.

The method and device of this embodiment can be applied in a data network management system and used when issuing CLI commands in batches.

The present embodiment will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 2, the process of sending the command by the sending device includes:

Step 201: The sending device detects whether the connection status with the device is normal, if the connection status is abnormal or has not been logged in, then re-login (disconnect first and then log in) or log in;

Step 202: After the login is successful, set and start the receiving device, then number the command group, add a start mark command and an end mark command to the command group, and add the command group to the command cache;

Step 203: The cache monitors that a command group arrives, immediately fetches the command group, and sends the commands in the command group to the device one by one.

As shown in Figure 3, the process of receiving the returned information includes:

Step 301: The receiving device reads the returned information of the device in a blocking manner, and once the returned information fragment is read from the device, appends the information fragment to the returned result cache;

Step 302: Extract the character string from the cache, first look for the start flag command, if found, extract and record the command group number;

Both Telnet and SSH protocols can echo commands, so the flag command sent will be echoed in the returned information.

Step 303: Find the end flag command, divide the accumulated return information based on the command group, establish the corresponding relationship between the return information and the command group, and extract the character string between the start flag and the end flag and send it to the result assembly device.

If neither the start sign command nor the end sign command can be found, it will be treated as an exception, and the result cache and related position information will be initialized. On the other hand, when no return information is received within the set timeout period, the receiving process is interrupted.

As shown in Figure 4, the process of result grouping includes:

Step 401: the receiving device sends the command group number and the return information of the command group as parameters to the result grouping device;

Step 402: The result grouping device obtains the corresponding command group from the command cache according to the command group number, and uses each command in the command group to match in the return information in order to determine the return information of each command;

Step 403: Determine whether the command is executed correctly or not according to the pre-stored feature information in the system, and if there is a fault, determine the cause of the fault, and fill the information into the pre-agreed data structure.

As shown in Figure 5, during the process of sending commands and receiving returned information, the connection fails due to equipment or network instability or other factors, resulting in abnormal failures in the sending and receiving process. The retransmission process includes:

Step 501: After the fault retransmission device detects an abnormality, it immediately suspends the sending and receiving actions, and disconnects the current faulty connection;

Step 502: Notify the target device to log in again. If the login is successful, search for the fault point command, extract the command group from the command cache according to the fault point command, and roll back the state of the sending device to the fault point command.

For example, when the faulty retransmitting device detects a fault at point A1, and the sending device has sent command groups to point A4 in sequence, the faulty retransmitting device returns the position of the command group of the sending device to point A1.

Obviously, those skilled in the art should understand that each entity and step of the present invention described above can be implemented by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network composed of multiple computing devices Optionally, they can be realized by program codes executable by a computing device, thus, they can be stored in a storage device to be executed by a computing device, or they can be separately manufactured as individual integrated circuit entities, or their Multiple entities or steps are implemented as a single integrated circuit entity. As such, the present invention is not limited to any specific combination of hardware and software.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. A device for issuing commands, which is applied to a network management system, comprising: a sending device dedicated to sending commands and a receiving device dedicated to receiving returned information, wherein: The sending device is used to establish a connection with the target device, and to send a command group to the target device independently of the receiving device; it is also used to add a start mark command and an end mark command to the command group; The receiving means is configured to receive the return information sent by the target device independently of the sending means; and is also configured to accumulate the received return information of the target device, and according to the beginning of the return information in the return information The flag command and the end flag command divide the accumulated return information based on the command group, and establish the corresponding relationship between the returned information and the command group. 2. The apparatus according to claim 1, further comprising a result grouping device; The receiving device is further configured to send the return information divided based on the command group to the result grouping device; The result grouping device is configured to determine the execution result of each command in the command group from the returned information divided based on the command group. 3. The device according to claim 1, further comprising a fault retransmission device; The fault retransmission device is used to detect the status of the sending device sending the command group and the receiving device receiving the returned information, and disconnect the sending device from the target device when an abnormality occurs, and notify the The target device logs in again, and searches for the fault point command, and rolls back the state of the sending device to the fault point command. 4. The device of claim 2, wherein: The process of the receiving device dividing the accumulated return information based on the command group according to the start mark command and the end mark command is to extract the return information, search for the start mark command, and if found, extract and record the command group number, and search for the end mark command, if found, then establish the corresponding relationship between the return information between the start mark command and the end mark command and the command group number. 5. The device of claim 4, wherein: The process of determining the execution result of each command in the command group from the return information divided by the command group as a basis is that the result grouping device obtains the corresponding command according to the command group number group, and match the commands in the command group with the corresponding return information, determine the return information of the command, and judge the execution result of each command according to the feature information. 6. A method for issuing commands, applied to a network management system, comprising: The sending device establishes a connection with the target device, and sends the command group to the target device independently of the receiving device; The receiving means and the sending means independently receive the return information sent by the target device; Wherein, the sending device focuses on sending commands, and the receiving device focuses on receiving return information; The method also includes: The sending device adds a start flag command and an end flag command to the command group before sending the command group to the target device; After the receiving device receives the return information, it accumulates the received return information of the target device, and performs the accumulated return information based on the command group according to the start mark command and the end mark command in the return information. Divide and establish the corresponding relationship between the returned information and the command group. 7. The method of claim 6, further comprising: After the receiving device divides the accumulated return information based on the command group, it sends the return information divided based on the command group to the result grouping device; The result assembling means determines the execution result of each command in the command group from the returned information divided based on the command group. 8. The method of claim 6, further comprising: The fault retransmission device detects the status of the sending device and the receiving device during the process of sending the command group by the sending device and receiving the return information by the receiving device, and disconnects the sending device from the target when an abnormality occurs. connection of the device, notify the target device to log in again, and find the fault point command, and return the state of the sending device to the fault point command.