11.3 Management in the Wired World

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In the wired world, network management begins with such basic hardware components as data sets (CSUs/DSUs), routers, switches, multiplexers and servers (see Figure 11.1). These and other devices typically have the ability to monitor performance, test for, and diagnose problems regarding their own operation and are capable of reporting their status to a central management station, either periodically or on request. The management station operator can initiate test procedures on systems at any point in the network. On more complex multipoint and multidrop configurations, the capability to test and diagnose problems from a central location greatly facilitates problem resolution. This capability also minimizes the need to dispatch technicians to remote locations and reduces overall maintenance costs.

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Figure 11.1: Each type of device on the network may have its own EMS, which reports to a central network management system (CNMS) that integrates, prioritizes, and permits analysis of information from multiple element managers.

A minimal NMS consists of a CPU, system controller, operating system software, storage device, and an operator’s console. The central processor may consist of a minicomputer or microcomputer. The system controller, the heart of the NMS, continuously monitors the network and generates status reports from data received from various network components. The system controller also isolates network faults and restores segments of the network that have failed, or which are in the process of degrading. The controller usually runs on a powerful platform such as UNIX or Windows NT/2000.

Even today, SNMP is the basis for most NMSs. It provides the ability to manage network devices in a multivendor environment from a central location. In fact, virtually any enterprise-class device that can be connected to a network supports SNMP, including wireless client adapters, access points, and bridges. This means SNMP can be used to manage both the wired and wireless elements of an enterprise network.



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LANs to WANs(c) The Complete Management Guide
LANs to WANs: The Complete Management Guide
ISBN: 1580535720
EAN: 2147483647
Year: 2003
Pages: 184

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