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IAB/IESG Recommendations on IPv6 Address (RFC3177)

IP.com Disclosure Number: IPCOM000005404D
Original Publication Date: 2001-Sep-01
Included in the Prior Art Database: 2001-Sep-26
Document File: 11 page(s) / 23K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

IAB: AUTHOR [+2]

Abstract

This document provides recommendations to the addressing registries (APNIC, ARIN and RIPE-NCC) on policies for assigning IPv6 address blocks to end sites. In particular, it recommends the assignment of /48 in the general case, /64 when it is known that one and only one subnet is needed and /128 when it is absolutely known that one and only one device is connecting.

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Network Working Group IAB Request for Comments: 3177 IESG Category: Informational September 2001

IAB/IESG Recommendations on IPv6 Address Allocations to Sites

Status of this Memo

This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2001). All Rights Reserved.

Abstract

This document provides recommendations to the addressing registries (APNIC, ARIN and RIPE-NCC) on policies for assigning IPv6 address blocks to end sites. In particular, it recommends the assignment of /48 in the general case, /64 when it is known that one and only one subnet is needed and /128 when it is absolutely known that one and only one device is connecting.

The original recommendations were made in an IAB/IESG statement mailed to the registries on September 1, 2000. This document refines the original recommendation and documents it for the historical record.

1. Introduction

There have been many discussions between IETF and RIR experts on the topic of IPv6 address allocation policy. This memo addresses the issue of the boundary in between the public and the private topology in the Internet, that is, how much address space should an ISP allocate to homes, small and large enterprises, mobile networks and transient customers.

This document does not address the issue of the other boundaries in the public topology, that is, between the RIRs and the LIRs.

This document was developed by the IPv6 Directorate, IAB and IESG, and is a recommendation from the IAB and IESG to the RIRs.

IAB IESG Informational [Page 1]

RFC 3177 IAB/IESG Recommendations on IPv6 Addresses September 2001

2. Background

The technical principles that apply to address allocation seek to balance healthy conservation practices and wisdom with a certain ease of access. On one hand, when managing a potentially limited resource, one must conserve wisely to prevent exhaustion within an expected lifetime. On the other hand, the IPv6 address space is in no sense as limited a resource as the IPv4 address space, and unwarranted conservatism acts as a disincentive in a marketplace already dampened by other factors. So from a market development perspective, we would like to see it be very easy for a user or an ISP to obtain as many IPv6 addresses as they really need without a prospect of immediate renumbering or of scaling inefficiencies.

The IETF makes no comment on business issues or relationships. However, in general, we observe that technical delegation policy can have strong business impacts. A strong requirement of the address delegation plan is that it not be predicated on or unduly bias business relationships or models.

The IPv6 address, as currently defined, consists of 64 bits of "network number" and 64 bits of "host num...