--- vijay gill <vgill@vijaygill.com> wrote:
How would you know this? Historically, the cutting edge technology has always gone into the large cores first because they are the ones pushing the bleeding edge in terms of capacity, power, and routing.
/vijay
I'm not sure that I'd agree with that statement: most of the large providers with whom I'm familiar tend to be relatively conservative with regard to new technology deployments, for a couple of reasons: 1) their backbones currently "work" - changing them into something which may or may not "work better" is a non-trivial operation, and risks the network. 2) they have an installed base of customers who are living with existing functionality - this goes back to reason 1 - unless there is money to be made, nobody wants to deploy anything. 3) It makes more sense to deploy a new box at the edge, and eventually permit it to migrate to the core after it's been thoroughly proven - the IP model has features living on the edges of the network, while capacity lives in the core. If you have 3 high-cap boxes in the core, it's probably easier to add a fourth than it is to rip the three out and replace them with two higher-cap boxes. 4) existing management infrastructure permits the management of existing boxes - it's easier to deploy an all-new network than it is to upgrade from one technology/platform to another. -David Barak -Fully RFC 1925 Compliant __________________________________ Do you Yahoo!? Get better spam protection with Yahoo! Mail. http://antispam.yahoo.com/tools