RFC 3587 (rfc3587) - Page 1 of 5
IPv6 Global Unicast Address Format
Alternative Format: Original Text Document
Network Working Group R. Hinden
Request for Comments: 3587 Nokia
Obsoletes: 2374 S. Deering
Category: Informational Cisco
E. Nordmark
Sun
August 2003
IPv6 Global Unicast Address Format
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 (2003). All Rights Reserved.
Abstract
This document obsoletes RFC 2374, "An IPv6 Aggregatable Global
Unicast Address Format". It defined an IPv6 address allocation
structure that includes Top Level Aggregator (TLA) and Next Level
Aggregator (NLA). This document makes RFC 2374 and the TLA/NLA
structure historic.
1. Introduction
RFC 2374, "An IPv6 Aggregatable Global Unicast Address Format",
defined an IPv6 address allocation structure that includes TLA and
NLA. This document replaces RFC 2374, and makes RFC 2374 and the
TLA/NLA structure historic.
2. TLA/NLA Made Historic
The TLA/NLA scheme has been replaced by a coordinated allocation
policy defined by the Regional Internet Registries (RIRs) [IPV6RIR].
Part of the motivation for obsoleting the TLA/NLA structure is
technical; for instance, there is concern that TLA/NLA is not the
technically best approach at this stage of the deployment of IPv6.
Moreover, the allocation of IPv6 addresses is related to policy and
to the stewardship of the IP address space and routing table size,
which the RIRs have been managing for IPv4. It is likely that the
RIRs' policy will evolve as IPv6 deployment proceeds.
Hinden, et al. Informational