On Mon, Sep 23, 2002 at 11:26:22AM -0400, Alex Rubenstein <alex@nac.net> wrote:
- flat fee for a L Mbps link
Also known as 'fractional' or 'tiered.' $x for y mb/s, and it is rate-limited.
- volume based, y $ per Mbps (95% quantile) for a L Mbps link - burstable, flat fee for x Mbps on a L Mbps and z $ per Mbps above x
These two are essentially the same. You do have three variations of usage-based, however:
a) vth percentile: $x per y zzzbits/sec, with a t committment. Occasionally, any usage over t has a different price.
In my somewhat limited experience, "t" commitment is usually at least 10% of wire speed. Though if transit is coming off low-cost LAN ports in data center environments, sales folks will probably approve lower commits if pressured. Also, some large ISP's have a policy that you must buy the whole pipe unmetered if your commit is >50% pipe speed. And there are at least 4 ways of computing 95th percentile, though I'm sure there've already been threads on this. Cheers, -Lane
b) 'Average usage', which is is the same as A, but using an averaging measurement system, rather than a percentile system (50th percentile is NOT the same as, or even relevant to, average).
c) counting bytes: $x per y bytes.
-- Alex Rubenstein, AR97, K2AHR, alex@nac.net, latency, Al Reuben -- -- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --