On Sat, Jun 02, 2001 at 05:19:16PM -0500, Albert Meyer wrote:
I almost got caught by this one a few months ago. I was fixing to sign a contract with Exodus for a 100bT circuit when I noticed some funny-looking language and asked some probing questions, and then realized that I had to double their quoted rates before comparing them to everyone else. This moved them from the front of the pack back to UU-land.
UUNet is another story. They not only charge significantly more than everyone else, but they calculate 95th percentile on the higher of incoming and outgoing rather than the average. When I asked my salesperson why she couldn't give me a competitive rate, she said "Because we're UUNet." She seemed pretty taken aback when I explained
Exodus is the worst on billing bit for bit. The way I read the Exodus 95th percentile document (though I still havn't gotten it confirmed by a person who actually knew what they were talking about), they bill for the MAXIMIUM 95th percentile, on both inbound AND outbound. UUNet bills for the MAXIMIUM 95th percentile on inbound OR outbound, whichever is higher, as does AboveNet, and probably the majority of networks trying to be like UUNet. But a significant portion of other networks will bill for the AVERAGE under the 95th percentile. I think the MAXIMIUM is unclear to a lot of people, especially the sales people if you try to get a straight answer out of them. When most people refer to the UUNet "95th percentile", this is what they mean. You take traffic samples, line them up in order, lop off the top 5%, and whatever the number is for the sample right under that is what gets multiplied by the cost per mbit. This means that if you push 1Mbps for 25 days and 10Mbps for 5 days you will pay 10 * $$$ per mbit. Average means you will pay 2.5 * $$$ per mbit (((1 * 25) + (10 * 5)) / 30), obviously a major difference. A LOT of sales people are misleading or utterly clueless about this, and a lot of providers actually WILL bill you for the AVERAGE under the 95th percentile (though if you think about it the 95th percentile makes little sense if you average it, it was designed to extract the maximium amount of money while not making people utterly afraid to burst higher). Moral of the story, check for those words "AND" vs "OR", and "MAXIMIUM" vs "AVERAGE", ask for their boss and check it again, and then get it in writing. :P -- Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras PGP Key ID: 0x138EA177 (67 29 D7 BC E8 18 3E DA B2 46 B3 D8 14 36 FE B6)