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| 1.1 |  | Network Baselining |
| 1.1.2 |  | Planning for the first baseline |

When conducting the initial baseline, start by selecting a few variables that represent the defined policies. If too many data points are selected, the amount of data can be overwhelming, making analysis of the collected data difficult. Hence, start out simply and fine tune along the way. Generally, some good starting measures are interface utilization and CPU utilization.

Collect data for a day or two before starting the actual baseline study to determine whether the right data is being gathered from the right devices. After recording a couple of days’ worth of data, graph the collected data in different ways in order to better show where the network needs improvement. Slicing through the data in different ways can reveal interesting and sometimes surprising observations.

Pick the top few reports that are relevant and study them to determine whether there is more information needed, in order to understand a particular pattern or trend. Then, fine tune the data to be collected and begin the actual baseline study.

Baseline analysis of the network should be conducted on a regular basis. Perform an annual analysis of the entire network or baseline different sections of the network on a rotating basis. Analysis must be conducted regularly in order to understand how the network is affected by growth and other changes.

Gathering the information in a consistent manner and analyzing the data will allow informed design decisions as well as expedite fault isolation.