nanog mailing list archives
Re: Dual stack IPv6 for IPv4 depletion
From: Barry Shein <bzs () world std com>
Date: Thu, 16 Jul 2015 12:39:58 -0400
Yeah wow 127/8, that one always amazed me, 16M addrs because it was computationally cheap to test for ((0x7f & addr) == 0x7f). I wonder what are the most 127.* addrs ever used by one site? I know there are some schemes which blackhole to 127.0.0.n incrementing n so the number of hits on each blackhole can be counted separately (more or less) but 16M? I doubt even 254 were used in those schemes very often. WWWT? (What Were We Thinking?) Oh well water under the bridge. On July 15, 2015 at 17:53 jfbeam () gmail com (Ricky Beam) wrote:
On Wed, 15 Jul 2015 17:34:13 -0400, Owen DeLong <owen () delong com> wrote:That covers multicast and RFC-1918. Are there any other IPv4 segmentations that you can think of?...Given that we came up with 3 total segmentations in IPv4 over the course#1-3,#4 RFC-1918 is 3 "segments" and we recently added a 4th (for CGN). #5 Localhost (127/8) #6 Multicast (224/4) #7 "Class E" (240/4) #8 0/8 #9 255/8 (technically, part of class e, but it's called out specifically in various RFCs)
-- -Barry Shein The World | bzs () TheWorld com | http://www.TheWorld.com Purveyors to the Trade | Voice: 800-THE-WRLD | Dial-Up: US, PR, Canada Software Tool & Die | Public Access Internet | SINCE 1989 *oo*
Current thread:
- Re: Dual stack IPv6 for IPv4 depletion, (continued)
- Re: Dual stack IPv6 for IPv4 depletion Matthew Kaufman (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Mark Andrews (Jul 14)
- RE: Dual stack IPv6 for IPv4 depletion Tony Hain (Jul 14)
- Re: Dual stack IPv6 for IPv4 depletion Lyndon Nerenberg (Jul 14)
- Re: Dual stack IPv6 for IPv4 depletion Doug Barton (Jul 14)
- Re: Dual stack IPv6 for IPv4 depletion George Metz (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Owen DeLong (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Barry Shein (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Owen DeLong (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Ricky Beam (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Barry Shein (Jul 16)
- Re: Dual stack IPv6 for IPv4 depletion Doug Barton (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion George Metz (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Owen DeLong (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Doug Barton (Jul 15)
- RE: Dual stack IPv6 for IPv4 depletion Tony Hain (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Mark Andrews (Jul 14)
- Re: Dual stack IPv6 for IPv4 depletion Joe Maimon (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion joel jaeggli (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Joe Maimon (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Mark Andrews (Jul 15)