Dear all,The following Internet draft has been submitted today, proposing the redesignation of the IPv4 class-E address space (240/4) for private use, in particular for private networks which are too large to use the existing RFC1918 private address space.
This matter is not strictly one for RIR address policy processes, as Class E is not considered to be global unicast, nor is it subject to RIR policies.
However I believe that this is of interest to the APNIC address policy SIG. If there is some interest, I am sure there will be opportunity for discussion of this matter during APNIC 24 next months.
All the best Paul Wilson APNIC. ==== Individual Submission P. Wilson Internet-Draft G. Michaelson Intended status: Standards Track G. Huston Expires: February 4, 2008 APNIC August 3, 2007 Redesignation of 240/4 from "Future Use" to "Limited Use for Large Private Internets" draft-wilson-class-e-00.txt Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on February 4, 2008. Copyright Notice Copyright (C) The IETF Trust (2007). Abstract This document directs the IANA to designate the block of IPv4 addresses from 240.0.0.0 to 255.255.255.255 (240.0.0.0/4) as unicast address space for limited use in large private Internets. Wilson, et al. Expires February 4, 2008 [Page 1] Internet-Draft 240/4 Private Use August 2007 1. Redesignation of 240.0.0.0/4 The address block spanning 240.0.0.0 to 255.255.255.255 (240.0.0.0/4), formerly designated as "Class E", and noted as being "Reserved" in the IANA IPv4 address registry, is no longer held in reserve by IANA for the IETF. IANA is directed to redesignate the address block 240.0.0.0/4 as unicast address space intended for private use in large private Internets that require more address space than is available in the private use address space designated by [RFC1918]. Potential users of this address space would need to ensure that their envisaged deployment can satisfy the use caveats noted here. 2. Caveats of Use Many implementations of the TCP/IP protocol stack have the 18.104.22.168/4 address block marked as experimental, and prevent the host from forwarding IP packets with addresses drawn from this address block. For this reason, it is strongly suggested that private network addressing requirements which can be fulfilled from the private use address space designated by [RFC1918] should continue to use that space. Network administrators with very large scale requirements for private use address space who wish to use addresses drawn from 240.0.0.0/4 are advised to conduct appropriate tests to ensure that such addresses can be used in their envisaged private use context. [Note: not for publication. It is suggested that in order to assist with verification of equipment compatibility, a separate informational RFC or other mechanism be developed to assist with the recording of specific test results, upgrade status, etc.] 3. Security Considerations Equipment deployed on the public Internet is configured by default to treat addresses in the block 240.0.0.0/4 as experimental addresses that cannot be forwarded. This implies that accidental leakage of packets destined to such addresses would conventionally be discarded. 4. IANA Considerations The IANA is directed to redesignate the block of IPv4 addresses from Wilson, et al. Expires February 4, 2008 [Page 2] Internet-Draft 240/4 Private Use August 2007 240.0.0.0 to 255.255.255.255 as unicast address space reserved for "Limited Use for Large Private Internets". 5. Acknowledgements The authors would like to acknowledge the thoughtful assistance of David Conrad, Andy Davidson and Robert Seastrom in the preparation of this document. 6. Normative References [RFC1918] Rekhter, Y., Moskowitz, R., Karrenberg, D., Groot, G., and E. Lear, "Address Allocation for Private Internets", BCP 5, RFC 1918, February 1996. Authors' Addresses Paul Wilson Asia Pacific Network Information Centre Email: pwilson at apnic dot net URI: http://www.apnic.net George Michaelson Asia Pacific Network Information Centre Email: ggm at apnic dot net URI: http://www.apnic.net Geoff Huston Asia Pacific Network Information Centre Email: gih at apnic dot net URI: http://www.apnic.net Wilson, et al. Expires February 4, 2008 [Page 3] Internet-Draft 240/4 Private Use August 2007 Full Copyright Statement Copyright (C) The IETF Trust (2007). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 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