Mike Hammett wrote: > Usually, DIA (as transit delivered to a customer) is more expensive than > transport + transit + small colo > (1U\2U stuff) + IX... at least as observed by many of my brethren.
Is this really true in the general case? Adding colo and IX to transport and transit involves at least one additional cross connect and an IX port fee. This is likely to push the total above the pure DIA price. However, regardless of how the numbers pencil out, this isn't really a fair comparison. For small ISPs, the yardstick against which adding an IX to the mix is usually measured against is the marginal cost of IP transit. Given that the cost of transport is fixed, is it more economical to buy more IP transit or to join an IX? Transit being so cheap means that joining an IX isn't always so enticing from a financial perspective, although there are other non-monetary benefits. I certainly subscribe to the notion that transport + transit is usually less expensive than DIA, but this does depend on the market and location. Jared
