Linux SNMP Basics

We have talked a lot about SNMP in Linux. There are some differences between SNMP protocol applications and WIN systems for Linux systems. This is why we separately introduce Linux SNMP. We know that the basic functions of Linux SNMP are: to obtain, set, and receive unexpected messages sent by the proxy. Obtaining refers to sending a request from the base station. The proxy returns the corresponding data based on the request and sets the value of the management object (that is, the proxy) set by the base station, the unexpected information sent by the receiving proxy refers to the exceptions that the proxy can report to the base station when the base station does not request.

As a network consultant or network administrator, your work is not completed after you have installed the network and set up the user account and application. Your next role is network management. It is like a battle that never ends.

There are two types of network management problems: software-related problems, such as data security and access permission, and hardware-related problems. Here we will focus on the second approach, that is, using the Simple Network Management Protocol Linux SNMP) and some ideas used to handle software-related management issues, manages network hardware as a whole.

There are many English-language websites that introduce Linux SNMP, but there are few Chinese-related websites. This is exactly the original intention of the people who set up this site. Here we will start from the basic principles, introduce what is Linux SNMP, and guide new users to practice it in person. In the near future, I will provide a simple release and source code based on X WINDOWS on LINUX and SOLARIS.

What is network management?

There are two types of network management. The first type is the management of network applications, user accounts, such as the use of files) and access permissions. They are all software-related network management issues. We will not discuss it here.

The second type of network management is composed of hardware that makes up the network. This category includes workstations, servers, NICS, routers, bridges, and hubs. Generally, these devices are far away from your location. For this reason, if the network administrator can be notified automatically when a device is faulty, everything will be fine.

However, your vro will not notify you by phone when an application problem occurs, and it will not notify you when the router is congested.

To solve this problem, vendors have already set up network management functions in some devices, so that you can remotely query their statuses, they can also give you a warning when a specific type of event occurs. These devices are usually called "smart" devices.

Linux SNMP is explained here. Next, we can see that network management is generally divided into four categories: