Common SNMP commands

The SNMP protocol contains many protocols and command applications. Now let's introduce this content. First, let's take a look at the basic concepts of SNMP. The Common commands will be explained later.

Simple Network Management Protocol (SNMP) is a Simple Network Management Protocol. It provides a framework for the Network Management system to manage the underlying Network. The SNMP protocol is widely used in many types of network devices, software, and systems, mainly because it has the following features:

First, SNMP is easy to implement compared with other types of network management systems or management protocols. SNMP management protocols, MIB, and other related system frameworks can run on different types of devices, from low-end PCs to high-end hosts, servers, routers, switches, and other network devices.

Linux SNMP is a series of protocol groups and specifications that provide a method to collect Network Management Information from devices on the network. Linux SNMP also provides a way for devices to report problems and errors to network management workstations.

An SNMP Management Proxy component does not require a large amount of memory space during runtime, so it does not require too much computing power. The SNMP protocol can be developed quickly in the target system, so it is easy to appear in new products or upgraded old products. Although the SNMP Protocol lacks some advantages of other network management protocols, it is simple in design, flexible in expansion, and easy to use. These features greatly make up for other shortcomings in the SNMP Protocol application.
 
Secondly, the SNMP protocol is an open free product. Only organizations under IAB approved by the IETF standard agenda can modify the SNMP protocol. Vendors can also modify the SNMP protocol in private, but such results may not be worth the candle, because they have to persuade other vendors and users to support their non-standard improvement on the SNMP protocol, this is contrary to their original intention.
 
Third, the SNMP protocol has a lot of detailed documents, such as RFC, and other articles and instructions). The network industry also has a deep understanding of this Protocol, these are the foundation for the development and improvement of the SNMP protocol.
 
Finally, the SNMP protocol can be used to control various devices. For example, non-traditional devices such as telephone systems, environmental control devices, and other devices that can access the network and need to be controlled can use the SNMP protocol.

The SNMP command is a shortcut for operating SNMP in Linux. Simple Network Management Protocol (SNMP) is a Simple Network Management Protocol. It provides a framework for the Network Management system to manage the underlying Network.

The SNMP Protocol defines the data packet format and information exchange between the network administrator and the management agent. It also controls the MIB Data Objects of the management agent. Therefore, it can be used to process various tasks defined by the management agent. The SNMP protocol is easy to use because it provides three basic SNMP commands for controlling MIB objects.

They are: Set, Get, and Trap:

Set: it is a privileged SNMP command, because it can be used to modify the configuration of the device or control the running status of the device.
 
Get: it is an SNMP command with the highest usage in the SNMP protocol, because this SNMP command is the basic way to obtain management information from network devices.
 
Trap: when the network management system has no clear requirements, the management agent notifies the network management system of some special situations or problems.
 
The SNMP protocol also defines the packet flow when the above three SNMP commands are executed, but it does not define other device management proxy SNMP commands, operations that can be applied to MIB Data Objects include the Set and Get commands, which target the values of data objects.

For example, the SNMP protocol does not define a reboot restart) SNMP command. However, the management agent software associates the MIB Data Object with the internal SNMP command of the device, in this way, some special command operations can be implemented. If you want to restart a device, the management system will set the value of a restart-related MIB Data Object to 1 ).

This will trigger the management agent to execute the SNMP command to restart the device, and reset the MIB Data Object to the original state.