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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: What does 95th %tile mean?
On Thu, Apr 19, 2001 at 05:18:02PM -0700, David Schwartz wrote: > > > I've looked at other ways and can't find any better. Billing based upon > NetFlow, for example, is still statistical sampling since NetFlow loses a > percentage of flows. For example, one of my VIP2-50's says: > So did you calculate, how much you are losing. It's less than 1% of a 1% of all flows. That means you catch up more than 99.99% of all flows. Not that bad. Furthermore NetFlow gives you the ability to offer value added (billing) services to your customers. For example ... > 368351628 flows exported in 12278484 udp datagrams > 33838 flows failed due to lack of export packet > 269989 export packets were dropped enqueuing for the RP > 108825 export packets were dropped due to IPC rate limiting > > Billing based upon total bytes transferred tends to create similar > problems. Do you bill based upon bytes transferred per day? Per month? If > so, it's still statistical sampling if you have some amount of 'paid > bandwidth'. > > And you can't collect this data from interfaces because interface rates > include local traffic, which (for example) grossly overbills customers with > newsfeeds. > ... you may easily deduct News traffic from being billed. BTW: tell me how do you exclude News Traffic if you count the 95th %ile? Billing based upon total bytes transferred is IMHO verfy fair and attractive from the point of a customer's view and tends to be a nightmare from an ISP's pespective especially if you don't just count bytes but are looking at the IP-addresses involved. Maybe a mixture of byte-counting and portspeed would give a fair billing model. BTW that's also the model you pay power for in Germany. > DS Arnold -- Arnold Nipper / nIPper consulting mailto:[email protected] Heilbronner Str. 34b Phone: +49 700 NIPPER DE D-76131 Karlsruhe Mobile: +49 172 2650958 Germany Fax: +49 180 505255469743
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