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Burstable Internet is a method of measuring bandwidth based on peak utilization. It also allows usage to exceed a specified threshold for brief periods of time without the financial penalty of purchasing a higher access speed.
The 95th percentile is a widely used mathematical calculation to evaluate sustained utilization of a network connection. Bandwidth is measured (or sampled) from the switch or router and recorded in a log file. This is done every 5 minutes. At the end of the month, the samples are sorted from highest to lowest, and the top 5% (which equal to approximately 36 hours of a 30-day billing cycle) of data is thrown away. The next highest measurement becomes the billable utilization for the month.
The sampling interval, or how often samples are taken, is an important factor in percentile calculation. A percentile is calculated on a set of data points. Every data point represents the average bandwidth used during the sampling interval (e.g., five minutes) and is calculated as the number of bits transferred throughout the interval divided by the duration of the interval (e.g., 300 seconds). The resulting value represents the average utilization rate for a single sampling interval and is expressed as bits per second.
BGP Communities are a way for a customer to “Tag an IP Prefix” with a certain value that IFN’s Internet routers will then act upon. The following is a list of the BGP communities that our BGP customers may use. From a syntax stand-point, IFN does not provide any example configurations. Depending on the customer router being deployed, syntax will vary.