nanog mailing list archives
Re: IPv4 address length technical design
From: Eugen Leitl <eugen () leitl org>
Date: Thu, 4 Oct 2012 08:47:45 +0200
On Wed, Oct 03, 2012 at 06:59:20PM -0400, Valdis.Kletnieks () vt edu wrote:
Where's Noel Chiappa when you need him?(2) The new protocol will use variable-length address for the Host portion, such as used in the addresses of CLNP,This also was considered during the IPv6 design phase, and the router designers had a collective cow, as it makes ASIC design a whole lot more interesting. And back then, line speed was a lot lower than it is now... Not saying it can't be done - but you're basically going to have to do CLNP style handling at 400Gbits or 1Tbit. Better get those ASIC designers a *lot* of caffeine, they're gonna need it...
Except that these will be pure photonic networks, and apart from optical delay lines for your packet buffer you'd better be able to make a routing (switching) decision while few bits of the header have streamed by your photonic router circuit. There is no time for any table look-ups, obviously. And optical gates are *really* expensive, so better use few of them. And don't add too many gate delays, too. Above describes your setting for the next protocol. There is not a lot of leeway in design space, I'm afraid.
Current thread:
- Re: IPv4 address length technical design, (continued)
- Re: IPv4 address length technical design Jeroen van Aart (Oct 29)
- RE: IPv4 address length technical design Tony Hain (Oct 03)
- Re: IPv4 address length technical design George Herbert (Oct 03)
- RE: IPv4 address length technical design Tony Patti (Oct 03)
- Re: IPv4 address length technical design Valdis . Kletnieks (Oct 03)
- Re: IPv4 address length technical design Dave Crocker (Oct 03)
- Re: IPv4 address length technical design Jay Ashworth (Oct 03)
- Re: IPv4 address length technical design Jimmy Hess (Oct 03)
- Re: IPv4 address length technical design Valdis . Kletnieks (Oct 03)
- Re: IPv4 address length technical design David Conrad (Oct 03)
- Re: IPv4 address length technical design Eugen Leitl (Oct 03)
- Re: IPv4 address length technical design Masataka Ohta (Oct 04)
- Re: [tt] IPv4 address length technical design Eugen Leitl (Oct 04)
- Re: [tt] IPv4 address length technical design Masataka Ohta (Oct 04)
- Re: IPv4 address length technical design Barry Shein (Oct 04)
- Re: IPv4 address length technical design Mark Andrews (Oct 04)
- Re: IPv4 address length technical design George Herbert (Oct 04)
- Re: IPv4 address length technical design Jay Ashworth (Oct 04)
- Re: IPv4 address length technical design Barry Shein (Oct 05)
- Re: IPv4 address length technical design Jay Ashworth (Oct 05)
- RE: IPv4 address length technical design nanog (Oct 06)