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Re: who gets a /32 [Re: IPV6 renumbering painless?]
Thus spake "Iljitsch van Beijnum" <email@example.com>
That assumes the company wants their employees using web or email, or that there are even humans at a site to begin with. Pipeline control systems, weather stations, cash registers, credit card machines and ATMs, warehouse inventory scanners, stock exchanges, etc. have no need to _directly_ talk to the outside world. People in customer-facing roles, like those at banks or airports, are not supposed to be surfing the web or even doing email at work. Many companies are still using green-screen apps or graphical applications that have a measured per-terminal average of under 1kbps; I ran into one company tunneling 9600bps serial over X.25 over IP -- ugly, but it worked for thousands of terminals.On 20-nov-04, at 18:34, Stephen Sprunk wrote:Don't have "real connectivity"?That's right. If you need internet access, you need it to be faster than 16 kbps.
However, all of these low-bandwidth hosts in far-off lands talk to a corporate datacenter somewhere, perhaps their own or a vendor's or customer's, and those hosts often talk to several other hosts who might also need (or at least have) access to the Internet. The options are NAT, ULAs, or PI space; total cost of implementation seems lowest for ULAs.
An unfiltered BGP feed should give you stats on what's quoted immediately above. If you want numbers of publicly-invisible hosts, even if you knew who to ask most would refuse to answer for "security reasons" or require an NDA. My best guess, having been on the inside at a few dozen enterprises, is that they number in the high millions to low tens of millions today. In five years, it'll be in the mid tens of millions as more and more new hardware comes with IP connectivity built-in and legacy apps are gradually updated.In my experience, they will announce the aggregate from all hub sites plus more-specifics for that hub and the sites directly connected to it. Traffic that comes into the wrong hub due to prefix length filters (or Internet outages) is back-hauled inside the corporate backbone.It would be interested to see some good statistics on this stuff. However many enterprises any of us has seen from the inside, it's still unlikly to be a statistically relevant sample.
Stephen Sprunk "God does not play dice." --Albert Einstein
CCIE #3723 "God is an inveterate gambler, and He throws the
K5SSS dice at every possible opportunity." --Stephen Hawking