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Network management tools based on SNMP (e.g., HP OpenView, IBM Tivoli, BMC Patrol) and remote terminal emulation (e.g., Telnet, Metaframe, Terminal Services) rely on the data network for the transport of management information. This is called in-band network management. It is a convenient way to perform regular management tasks, monitor the network and act on application failures. But if a network failure occurs or the network protocol stack at one specific server becomes unresponsive, connectivity to the network nodes is lost -- and in-band management tools cannot diagnose or recover the system. That's why managing mission critical networks require alternative management paths or out-of-band management. Managed nodes then can be reached when they lose connectivity to the network or even when the network is down. In a typical large data center, in-band management is effective to prevent and act on less than half of the situations that could cause unplanned downtime. A significant portion of such downtime is caused by infrastructure failures (hardware failures, OS lock-ups, networking problems, power failures, etc.) and can only be addressed by out-of-band management tools. By combining both in-band and out-of-band mechanisms and automating the management routine, IT management can ensure that the necessary steps have been taken to keep networks operational 24/7, minimizing or preventing applications and infrastructure failures, as well as operators errors. The Difference Between Access and Management It is not uncommon to find operators at network operations centers continuously watching sequential screen shots of individual servers and visually identifying error messages or relevant events. The tools are providing only remote access to the system console. But the monitoring is being done by people. Data center management needs to be automated. In large networks, it is not practical or efficient to rely solely on visual (or software-based) monitoring of individual systems as the means to detect and react to failures and events that can cause network downtime. Out-of-band management tools are evolving to provide automatic detection of events and supporting scripting of corrective actions. As much as possible, the data center should self-heal and the management systems should be able to take actions to recover the system even before a human operator is notified. The Bottom Line: The out-of-band management platform should go beyond mere remote presence services and provide the tools for automated monitoring and management, minimizing the need for human intervention. For Free Consultation on your project call Mainline Computer Products toll free at: (800)-686-5312 or E-mail: sales@mainlinegov.com. Special GSA terms are available to our government customers.
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