6. Security Considerations

   Security issues are not addressed in this memo.

7. Conclusion

   With the described scheme many large enterprises will need only a
   relatively small block of addresses from the globally unique IP
   address space. The Internet at large benefits through conservation of
   globally unique address space which will effectively lengthen the
   lifetime of the IP address space. The enterprises benefit from the
   increased flexibility provided by a relatively large private address
   space. However, use of private addressing requires that an
   organization renumber part or all of its enterprise network, as its
   connectivity requirements change over time.

8. Acknowledgments

   We would like to thank Tony Bates (MCI), Jordan Becker (ANS), Hans-
   Werner Braun (SDSC), Ross Callon (BayNetworks), John Curran (BBN
   Planet), Vince Fuller (BBN Planet), Tony Li (cisco Systems), Anne
   Lord (RIPE NCC), Milo Medin (NSI), Marten Terpstra (BayNetworks),
   Geza Turchanyi (RIPE NCC), Christophe Wolfhugel (Pasteur Institute),
   Andy Linton (connect.com.au), Brian Carpenter (CERN), Randy Bush
   (PSG), Erik Fair (Apple Computer), Dave Crocker (Brandenburg
   Consulting), Tom Kessler (SGI), Dave Piscitello (Core Competence),
   Matt Crawford (FNAL), Michael Patton (BBN), and Paul Vixie (Internet
   Software Consortium) for their review and constructive comments.

9. References

   [RFC1466] Gerich, E., "Guidelines for Management of IP Address
       Space", RFC 1466, Merit Network, Inc., May 1993.

   [RFC1518] Rekhter, Y., and T. Li, "An Architecture for IP Address
       Allocation with CIDR", RFC 1518, September 1993.

   [RFC1519] Fuller, V., Li, T., Yu, J., and K. Varadhan, "Classless
       Inter-Domain Routing (CIDR): an Address Assignment and
       Aggregation Strategy", RFC 1519, September 1993.









 
RFC 1918        Address Allocation for Private Internets   February 1996


10. Authors' Addresses

   Yakov Rekhter
   Cisco systems
   170 West Tasman Drive
   San Jose, CA, USA
   Phone: +1 914 528 0090
   Fax: +1 408 526-4952
   EMail: yakov@cisco.com


   Robert G Moskowitz
   Chrysler Corporation
   CIMS: 424-73-00
   25999 Lawrence Ave
   Center Line, MI 48015
   Phone: +1 810 758 8212
   Fax: +1 810 758 8173
   EMail: rgm3@is.chrysler.com


   Daniel Karrenberg
   RIPE Network Coordination Centre
   Kruislaan 409
   1098 SJ Amsterdam, the Netherlands
   Phone: +31 20 592 5065
   Fax: +31 20 592 5090
   EMail: Daniel.Karrenberg@ripe.net


   Geert Jan de Groot
   RIPE Network Coordination Centre
   Kruislaan 409
   1098 SJ Amsterdam, the Netherlands
   Phone: +31 20 592 5065
   Fax: +31 20 592 5090
   EMail: GeertJan.deGroot@ripe.net


   Eliot Lear
   Mail Stop 15-730
   Silicon Graphics, Inc.
   2011 N. Shoreline Blvd.
   Mountain View, CA 94043-1389
   Phone: +1 415 960 1980
   Fax:   +1 415 961 9584