How many IP addresses?

2000-04-25 Thread Graham Klyne
At 11:06 PM 4/23/00 -0500, Richard Shockey wrote: With "always on" IP and IP on anything this is closer to reality than we might think. In order to permit a reasonable allocation of addresses with room for growth the idea of 25 IP address per household and 10 person actually seems

RE: How many IP addresses?

2000-04-25 Thread Michael B. Bellopede
But we have to engineer this in some fashion that permits efficient use of these addresses by hosts and (especially) routers. (An earlier poster wrote that you "just have to write the code". That's the wrong idea -- big iron routers don't use "code" to do forwarding, they use silicon, and

Re: How many IP addresses?

2000-04-25 Thread Steven M. Bellovin
In message [EMAIL PROTECTED], "Mi chael B. Bellopede" writes: But we have to engineer this in some fashion that permits efficient use of these addresses by hosts and (especially) routers. (An earlier poster wrote that you "just have to write the code". That's the wrong idea -- big iron

Re: How many IP addresses?

2000-04-25 Thread John Day
At 9:41 -0400 4/25/00, Steven M. Bellovin wrote: In message [EMAIL PROTECTED], Graham Klyne wri tes: At 11:06 PM 4/23/00 -0500, Richard Shockey wrote: With "always on" IP and IP on anything this is closer to reality than we might think. In order to permit a reasonable allocation of addresses with

RE: How many IP addresses?

2000-04-25 Thread Tripp Lilley
On Tue, 25 Apr 2000, Michael B. Bellopede wrote: wrong idea -- big iron routers don't use "code" to do forwarding, they use silicon, and very fast silicon at that. There are routers in production --Steve Bellovin Software, firmware, its a matter of semantics. Do you think

RE: How many IP addresses?

2000-04-25 Thread Timothy Behne
25, 2000 10:02 AM To: Steven M. Bellovin; Graham Klyne Cc: Richard Shockey; [EMAIL PROTECTED] Subject: Re: How many IP addresses? At 9:41 -0400 4/25/00, Steven M. Bellovin wrote: In message [EMAIL PROTECTED], Graham Klyne wri tes: At 11:06 PM 4/23/00 -0500, Richard Shockey wrote: With "a

Re: How many IP addresses?

2000-04-25 Thread Steven M. Bellovin
In message CC96542306D7D2119E0B080009EB58FE9582BA@MERCURY, Timothy Behne writ es: Also, I dont see how you got 25*10^9 * 1000 * 10 = 25*10^9. Should be 25*10^13. This requires log(25*10^13)/log(2), or 48 bits, to use every address. So the original answer (80 bits left over) was correct, and

Re: How many IP addresses?

2000-04-25 Thread Keith Moore
Doesn't this leave out a few pieces of data? Given the current IPv6 address format, which includes a globally unique 64 bit interface ID and 64 bits of globally unique routing goop. My calculation is that you only have 2^64 addresses to work with which leaves roughly 12 bits, maybe 14 to