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  When defining the functions of NMS and EMS, it is often referred to as FCAPS. FCAPS stands for Fault, Configuration, Account, Performance, and Security. The functions of a normal management system are all included in this category. Let's take a look at each function.   Fault Management Fault means unavailable status. When talking about a fault, it is usually referred to as an alarm. Fault and alarm are not specifically distinguished, but to be strict, fault can be considered to mean a phenomenon in which a fault occurred in the system, and faults are classified into hardware and software. Alarm defines in detail about a fault that has occurred and informs the operator when a fault occurs.   According to the definition of the standard document, Alarm usually has Severity, Probable Cause, Category, and additionally includes location information. A brief look at each definition is as follows.   Severity: Severity is defined as Critical Major, Minor, Warn...

Simple Network Management Protocol (SNMP) is a Management Protocol most used in network management systems. More than 70% of the world's network equipment supports SNMP, and as it has a long history, it is easy to develop and verify with various tools and libraries that have already been verified.   On the other hand, the simple structure of GET, SET, and NOTIFICATION is not easy to standardize, and it is difficult to implement various OAM functions. There are many standard MIBs defined by IETF(RFC xxxx), and large equipment manufacturers basically support them, but m ost of the MIBs required for operation are supported as private MIBs, and the main functions are often vendor specific.   As a result, Service Providers requested a standardized operation plan, which became the background for NETCONF and others. Nevertheless, since SNMP is still the most widely used protocol, so it is essential to understand the management system. The history of SNMP As the Internet based...

First of all, NMS is an abbreviation for Network Management System, and EMS is an abbreviation for Element Management System. TMN, a very old standard document, describes the two as concepts such as NM, EM, and NE. We will look at the relevant standard documents when there is an opportunity in the future, and first, let's look at a schematic concept. In order to efficiently operate and manage network equipment, NMS and EMS suitable for the service area are required. In general, in the case of wired networks, NMS is often operated alone, and in the case of mobile communication networks, EMS is required in addition to NMS. In this article, we will examine the concept of the overall management system and explain the differences between NMS and EMS. Management System refers to a GUI system that performs network management functions, usually represented by FCAPS. Here, FCAPS means the following five functions. l   Fault Management  l   Configuration Management l   Accou...