Proposal of"Time-Limited" IPv4 Address
Allocation Policy• Project leader : Jun Murai <jun@wide.ad.jp>• Project officiers:– Hiroshi Esaki <hiroshi@wide.ad.jp>– Akira Kato <kato@wide.ad.jp>– Osamu Nakamura <osamu@wide.ad.jp>– Masaki Minami <minami@sfc.wide.ad.jp>– Tsukasa Ogino <ogino@iri.co.jp>– Takashi Arano <arano@byd.ocn.ad.jp>

Outline of the Proposal• Background• Objective and Outcome• Relationship with RIR• Work of Project's Registry• Address Allocation Policy– From the project registry to ISP– From ISP to customer• Period of the Project• Project Officers

Background (1)• Challenges of Internet– Preservation of end-to-end architecture– IP version 6 deployment• Existing address allocation policy;
conserve the IPv4 address space and route aggregation– RFC2050, RFC1519(CIDR), RFC2008• Good for ISP providing dial-up connections– Emerging the ISP providing "always connected"– Restrictions by the NAT based connectivity (e.g., IPSec)

Background (2)• RFC2050 allows allocation of minimum
amount of IPv4 addresses may introduce the technical difficulty for theemerging ISP providing always connectedenvironment.
Allocation is based on the number of committed
customers, with the report of huge number ofassignment record to the registry to request nextaddress blockBackground (3) and Proposal (1)• No explicit due is defined in the current policy– RIR strictly justify the requirements– registry may want to conserve address space• We propose "Time-Limited" leasing policy and it'spractical implementation– Lease Term is defined on allocation• Upon expiration– Address space must be returned to free block– Transition to IPv6– May renumber to other IPv4 address space which isallocated according to the effective policy.

Goal of the Project• Encourage emerging ISPes– With the time-limited address leasing policy,
very tight address allocation guideline is notnecessary.
– More relaxed policy can be defined so that thoseISPs are able to bootstrap without any technicaldifficulties. Even if the address space allocated tothe ISPs are too large, the space will be returnedback within a specified term. ISP can design theIP version 4 network without as small as possible
allocated IP address space. Then, ISP canprovide global IP version 4 addresses to thecustomer site to preserve the end-to-end
architecture.

Project Outline• New ''IP version 4 address'' lease policy– "Time-Limited Lease" policy– Return before December 31 of 2005

• Reuse of IP version 4 address– Global but used as private• Practical IP version 6 transition• Explore new business based on the end-toend model• IP version 6 address management

Relationship with RIR• "registry" operated by IPv6 deployment andpromotion committee, technically supportedby WIDE Project and by JPNIC• Report to APNIC (i.e., belonging to APNIC)• Reporting and management structure

Work of Registry• Relaxed address allocation (with time-limited leaseagreement), with the estimation of required addresses at six
month later.
• Development and operation of address registry, collaboratingwith JPNIC• Examine the activity report issued by the ISPs, every threemonths• The project registry examines the report from the ISP on
address assignment and usage status, after one year from thefirst address allocation. If necessary, the project registry audit
the ISP and/or may open the status to the public. Also, theproject registry may request the return of IP address to thecorresponding ISP.
• The examination result may effect to the future addressleasing.

Address Leasing Guideline (Proposal)• /0 - /24– ISP must ask this assignments to the registry– Request is examined by the registry– ISP registers to the registry database if allowed• /25 - /28– ISP can decide assignments by itself– ISP registers to the registry database• /29 - /32– ISP can decide assignments by itself– ISP manages the assignment– Need not to register to the registry database

Period of the Project• First phase :– April 1, 2001 - December 31, 2001
– Address space : part of 43/8
• Second phase :– January 1, 2002 -December 31, 2002
– Address space : other IP version 4 address space• The allocated IP version 4 address must return before
December 31, 2005.

Proposal of"Time-Limited" IPv4 Address
Allocation Policy• Project leader : Jun Murai <jun@wide.ad.jp>• Project officiers:– Hiroshi Esaki <hiroshi@wide.ad.jp>– Akira Kato <kato@wide.ad.jp>– Osamu Nakamura <osamu@wide.ad.jp>– Masaki Minami <minami@sfc.wide.ad.jp>– Tsukasa Ogino <ogino@iri.co.jp>– Takashi Arano <arano@byd.ocn.ad.jp>