Cacti 0.8 network monitoring pdf download

Dan hebatnya lagi banyak perusahan kecil dan sampai kelas ISP besar menggunakan sistem monitoring ini. Buku ini membahas bagaimana memulai membangun Cacti menggunakan sistem operasi Windows dan Linux. Dilengkapi juga dengan ilustrasi gambar "step-by-step" untuk memudahkan pembaca. Author : Michael G. Video chat and live resources put demands on networks that were previously unimagined. Written to be accessible to all, Fundamentals of Communications and Networking, Third Edition helps readers better understand today's networks and the way they support the evolving requirements of different types of organizations.

While displaying technical depth, this new edition presents an evolutionary perspective of data networking from the early years to the local area networking boom, to advanced IP data networks that support multimedia and real-time applications. The Third Edition is loaded with real-world examples, network designs, and network scenarios that provide the reader with a wealth of data networking information and practical implementation tips.

Key Features of the third Edition: - Introduces network basics by describing how networks work - Discusses how networks support the increasing demands of advanced communications - Illustrates how to map the right technology to an organization's needs and business goals - Outlines how businesses use networks to solve business problems, both technically and operationally.

This book has been designed to guide the students of the Bachelor's in Telecommunications Technology Engineering towards a clear understanding of how to use the laboratory tools, and show them how to analyze and understand the collected measurements. In this context, the book first introduces and describes how to use the professional measurement tools employed in the laboratory activities of the mobile communications course at UMH.

These tools are commonly used by cellular radio engineers to monitor in real-time the performance of cellular networks through drive tests. The book first presents the Nemo Handy professional measurement testing tool developed by Anite. This tool is included in an engineering-mode cellular handset used to monitor in real-time the operation of cellular networks, and collect measurements for post-processing.

Such processing is done using the Nemo Outdoor tool that is also introduced in the book, including examples of how to perform the most relevant processing actions. Finally, this book shows how to conduct some measurement and analysis processes using Nemo Handy and Nemo Outdoor.

The measurements have been conducted over live UMTS and HSDPA networks in the city of Elche, and cover the analysis of important cellular functionalities like establishment and release of a call, cell selection and reselection, handovers, and analysis of data downloads and cellular parameters. This chapter shows with practical examples how to conduct the measurements using Nemo Handy, and how to interpret with Nemo Outdoor the exchanged cellular signaling messages in order to monitor the operation of cellular networks.

Naturally, computerization is so deep that we humans can't think of living a single day without it. A network is a series of points or nodes interconnected by communication paths. Networks can interconnect with other networks and contain sub-networks. This interconnectivity is done by devices such as routers, switches, hubs, network interface cards NIC , and so on. In the present infrastructure, devices are very complex, and hard to maintain and monitor, so it is not possible to monitor devices and servers manually at production level.

One of the fundamental jobs of a network administrator is network monitoring. Network monitoring is the process of checking computers, systems, and services that comprise a network.

This examination allows a network administrator to maintain a robust network and even improve the network. You'll never know when a power supply is going to burn out, when a server is going to crash, when network bandwidth drops, when a router just stops working, when your LAN is hacked, and so on.

You will never know when these things will happen, but you can be prepared for situations like these. Effective network monitoring will help to cope with such situations and minimize down-time. It will also help to collect periodic information about the network, which will help you to generate log files and performance charts of system capabilities and responses. With such data, you will be able to optimize your network infrastructure and performance.

By implementing network monitoring software, system administrators can gather sufficient amounts of data and reports periodically, which will help them to perform management processes fairly and more easily.

There are several commercial and open source network monitoring software that are robust and one-stop guiding tools. Cacti is one such tool, robust and one of the best! Ian Berry had started developing Cacti back in June , while he was working with a local Internet service provider in the U. He found that RRDTool is flexible enough to generate complex graphing and reports about network infrastructures, but it was lacking a friendly interface.

Soon, the application gained its popularity in the open source community. In , Ian brought a second developer into the team, which has expanded to six developers today.

Here they are in the order of joining the project :. First of all, Cacti is an open source tool. You can share "Cacti templates" with other users on the forum, which will save a lot of time, rather than design all the templates from scratch. We will talk about plug-ins in a later chapter. Cacti retrieves data through poller. It's an application executed at a constant time interval as a schedule service under different operating systems.

It is set in the operating system scheduler. In Unix, it is set under crontab. Cacti uses cmp. Presently, network infrastructure contains lot of different devices such as routers, switches, servers, UPS, and different computer and network appliances. There are lot of options to do this task, such as SQL database and flat file database.

Cacti uses RRDTool to store data. We will learn more about the RRDTool later in this chapter. That's why it's fast and easy to create graphs and reports from RRD files. The most important feature of the RRDTool is a built-in graphing function. Cacti uses this built-in graphing function to deploy customized graphing reports based on time series data collected from different SNMP-capable devices. This built-in graphing function supports auto-scaling and logarithmic y-axis.

It is possible to graph one or many items in one graph, also adding different legends denoting characteristics such as maximum, average, minimum, etc. The suite includes:. He extended the agent to provide more information about his local systems a private precursor to the Host Resources MIB and to flag certain error situations. He also added a simple way for the agent to run additional scripts and report the results, turning it into an extensible agent.

In , this code was made publicly available. RRDTool is a high performance data logging and graphing system, designed to handle time series data like network bandwidth, room temperature, CPU load, server load, and to monitor devices such as routers, UPS, etc. It is also known as the round-robin database tool, an industry standard, open source solution. It lets the administrator log and analyze data collected from all kinds of data sources DS , which are capable of answering SNMP queries.

The data analysis part of the RRDTool is based on the ability to generate graphical representations of the data values collected over a definable time period. RRDTool is written in C language and stores its data in. The number of records in a single. RRDTool offers several command line switches to access and manipulate. So, it can be used to write custom monitoring shell scripts or create whole applications using its language bindings.

Data acquisition: When monitoring a device or system, it is necessary to receive data on a constant time interval.

Manually, it is not possible to maintain such activity as a system administrator. In such situations, the RRDTool comes in handy. It stores the data in a round-robin database, which is received on a constant time interval set by the system administrator, using the poller application set as scheduler in the operating system. In this case, simply storing the data in a five-minute interval for the whole month will solve the problem.

But this will require huge disk space and a considerable amount of time to analyse the data, as in a network environment, administrators are not monitoring only a single device.

RRDTool solves this problem with the data consolidation feature. In this way, the RRDTool stores data in the most efficient way for a certain time period defined by the system administrator. This process keeps the database file at a constant size for faster processing and analyzing.