FW: IPv4 -- visual depictions

  • To: "'APOPS'" <apops at apnic dot net>
  • Subject: FW: IPv4 -- visual depictions
  • From: Barry Raveendran Greene <bgreene at cisco dot com>
  • Date: Fri, 5 Dec 1997 07:30:20 +0800
  • Organization: Cisco Systems - Corporate Consulting Group
  • Reply-to: "bgreene@cisco.com" <bgreene@cisco.com>
  • Sender: owner-apops@apnic.net
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      -----Original Message-----
      From:	Tracie Monk [SMTP:tmonk at caida dot org]
      Sent:	Friday, December 05, 1997 2:28 AM
      To:	nlanr at nlanr dot net; ccirn at fnc dot gov
      Subject:	IPv4 -- visual depictions
      
      
      All -
      
      Last week kc distributed a url describing visual depictions of IPv.4
      address space.  The url is:
       
        http://www.caida.org/IPv4space/
      
      These graphics were developed by Hans-Werner Braun (UCSD/CAIDA/NLANR),
      using data from the InterNIC database combined with BGP information
      gathered by Dave Meyer (UofOregon/CAIDA/NLANR).
      
      What is compelling about these visualizations is the point that they
      make about the level of use of current address space and the
      significant amount of reserved, not yet allocated space.  According to
      Jon Postel, 
      
      	>  The address space 64/8 thru 126/8 is 
       	   reserved for future use, and that
      	>  future may not be too far off.  It 
      	   won't be allocated as "class a"
      	>  space but to the regional registries 
      	   to be allocated in cidr blocks as
      	>  they do now with class c space.  61/8, 
      	   62/8. and 63/8 are already being
      	>  allocated this way.
      
      As you can imagine, the vast amount of available IPv4 Class A space
      clearly undermines many of the arguments in favor of IPv.6 -- at least
      those relating to depletion of Class B & C address space.
      
      kc will present a video on this topic and discuss several issues
      relating to measurement and caching at next week's IETF plenary
      session.
      
      If you have any questions/comments, please hollar.
      
      Tracie
      
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