On Sat, Nov 20, 2004 at 12:58:17PM +0100, Iljitsch van Beijnum wrote:
On 19-nov-04, at 17:58, Stephen Sprunk wrote: Don't have "real connectivity"? I've personally worked with dozens of Fortune 500 companies that have internal FR/ATM networks that dwarf AT&T, UUnet, etc. in the number of sites connected. Thousands of sites is common, and tens of thousands of sites in some cases. Do you not consider these networks "real" because each site may only have a 16k PVC to talk to corporate?
As far as I can tell, it's pretty rare for an organization of this size to have their own IP network that they use to connect all their sites to the global internet, for the simple reason that leased lines, framerelay or ATM capacity is generally more expensive than IP connectivity.
it is not rare at all, in my experience. my personal dealings with 50+ multinational corporations show that they -ALL- have their own corporate networks that are isolated from the Internet and nearly all run IP over these internal corporate networks. the trival cost of dedicated lines, or FR/ATM cloud, or VPN overlay is much cheaper than a dependance on upstream providers (since no single provider can support their needs) or exposing corporate/trade secrets to the broader internet.
So a single large address block is of little use to such an organization, unless they get to announce more specifics all over the place.
that does not follow, except from your faulty presumption above. -- bill