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Chapter 22. Troubleshooting Your Network > Tips from the Windows Pros: Monitori... - Pg. 674

Troubleshooting Your Network 674 Measuring Network Utilization In the right pane of the Performance console, you can add an item to the graph of performance statistics like this: 1. 2. 3. 4. 5. 6. Right-click in the graph pane, and select Add Counters. Check Use Local Computer Counters. Select the performance object named Network Interface. Select a counter such as Bytes Received/Sec, Packets Received Errors, and so on. Check Select Instances From List, highlight your LAN adapter interface name and click Add. Select Close. The Performance Monitor then graphs the amount of data traffic on your network connection or connections and the plot is updated as you watch. Now you can visually monitor the traffic on your network. To learn more details about this nifty system-monitoring application, see "Measuring System Per- formance with Performance Monitor," p. 846. Note To learn more information about network design and maintenance, take a look at Upgrading and Repairing Networks, Third Edition (ISBN: 0-7897-2557-6), from Que. To remove counters from the Performance graph, you can select the items in the legend below the graph and click the X icon at the top of the graph. Alternatively, you can right-click the graph and select Properties; next, select the Data tab, select Counters, and then click Remove. Tips from the Windows Pros: Monitoring Your LAN As businesses increasingly rely on computers by the thousands, flung far and wide around the globe, the job of managing them--that is, monitoring, identifying, and correcting problems--has become an industry of its own. Enterprise management is a hot expression in the computer industry now. Very pricey software systems have been developed to centrally monitor computers, networks, hubs, routing hardware, UPSs, and even computer room fire alarms. These systems detect problems and can notify staff via pager, e-mail, printouts, or, who knows, probably even carrier pigeon. The purpose of these systems is to catch problems as they develop, with any luck, before they disrupt people trying to do their work. Instrumentation is the key here: Equipment has to be designed to be monitored. A TCP/IP-based protocol called Simple Network Management Protocol (SNMP) has been around for years, and "managed" network equipment is capable of being probed and reconfigured via SNMP. Along with this capability comes a hefty price tag, but the net cost of maintaining and dispatching staff to fix problems is much greater. My small LAN with four users and a handful of development and online servers doesn't need a $20,000 management system, managed hubs, and the like. But, even in my little office, I find myself constantly checking to make sure the servers are up, that they have plenty of disk space, and that the Internet connection is working. What I really want is something to check these things periodically and let me know whether something's amiss. I guess plenty of other people do, too. Free enterprise is a wonderful thing. I searched the Web and found a handful of packages targeted for small LANs just like mine. If you have a LAN you depend on for your business, you might want to check them out. Hearing about a problem from your pager is a lot nicer than hearing about it from a client or an employee!