Performance and Fault Management by Paul L Della Maggiora, Christopher E. Elliott, James M.

By Paul L Della Maggiora, Christopher E. Elliott, James M. Thompson, Robert L. Pavone Jr., Kent J. Phelps

Finished advisor to designing and imposing potent recommendations for tracking functionality degrees and correcting difficulties in Cisco networks. presents an outline of router and LAN change operations to assist know how to regulate units. information tips to enforce the perform of community administration via documentation, method reports, and community baselining.

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SLAs center around a set of policies and must be realistically achievable. SLAs are business agreements that define a set of policies and business objectives that must be met and the consequences if they are not met. The SLA must translate into concrete data that is measurable and can be reported. Traditionally, service levels were measured in terms of services being delivered: response time, availability, and mean time to repair. In today's distributed networks, however, service levels are really more like "technical performance levels" because the measurements are based on concrete variables available from the devices, such as interface utilization or ping response times.

A policy describes an expectation from a part of the business. You must learn the business needs that drive the success of the network. Communication and Network Policies When articulating policies, you should do so from the user or network consumer's point of view. Latency, utilization, and response times mean very little to non-network personnel. From their perspective, an application must be available when they need it and at a speed that does not hinder their ability to do their work. For most companies, business requirements are vague or unspecified.

In this case, MRTG will do the job nicely (see the References at the end of this chapter for more information on MRTG). Initially, you try a dry run for a couple of days to make sure that the collection is configured correctly and the data is useful, and then finally kick off the actual baseline. During the collection period, you look at some of the data and play with the reporting. This allows you to set up reports that provide the information needed to document the baseline. It also allows you to identify troublespots that may get in the way of delivering your policies.

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