Network Working Group M. Blanchet
Internet-Draft Viagenie
Intended status: Informational March 20, 2007
Expires: September 21, 2007
Special-Use IPv6 Addresses
draft-ietf-v6ops-rfc3330-for-ipv6-00.txt
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Copyright Notice
Copyright (C) The IETF Trust (2007).
Abstract
This document describes the global and other specialized IPv6 address
blocks.It does not address IPv6 address space assigned to operators
and users through the Regional Internet Registries. These
descriptions are useful for route and IP filtering, for documentation
and other purposes.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Address Types . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Node-scoped Unicast . . . . . . . . . . . . . . . . . . . . 3
2.2. IPv4-Mapped Addresses . . . . . . . . . . . . . . . . . . . 3
2.3. Link-scoped Unicast . . . . . . . . . . . . . . . . . . . . 3
2.4. Site-scoped Unicast . . . . . . . . . . . . . . . . . . . . 3
2.5. Documentation Prefix . . . . . . . . . . . . . . . . . . . 3
2.6. 6to4 . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.7. Teredo . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.8. 6bone . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.9. Default Route . . . . . . . . . . . . . . . . . . . . . . . 4
2.10. Multicast . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Security Considerations . . . . . . . . . . . . . . . . . . . . 4
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 5
6. Informative References . . . . . . . . . . . . . . . . . . . . 5
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 5
Intellectual Property and Copyright Statements . . . . . . . . . . 7
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1. Introduction
This document describes the global and other specialized IPv6 address
blocks.It does not address IPv6 address space assigned to operators
and users through the Regional Internet Registries. These
descriptions are useful for route and IP filtering, for documentation
and other purposes.
The document is structured by address types.
Some tips about filtering are given, but are not mandatory to
implement.
2. Address Types
2.1. Node-scoped Unicast
::1/128 is the loopback address [RFC4291].
::/128 is the unspecified address [RFC4291].
The node-scoped unicast addresses should not be advertised and should
be filtered out when received.
2.2. IPv4-Mapped Addresses
::FFFF:0:0/96 is the IPv4-mapped addresses [RFC4291]. IPv4-mapped
addresses should not be advertised and should be filtered out when
received.
2.3. Link-scoped Unicast
fe80::/10 are the link-local unicast[RFC4291] addresses.Link-local
addresses should not be advertised and should be filtered out when
received.
2.4. Site-scoped Unicast
fc00::/7 are the unique-local addresses [RFC4193]. Unique-local
addresses should not be adverstied on the public Internet.
2.5. Documentation Prefix
The 2001:0db8::/32 are the documentation addresses [RFC3849]. They
are used for documentation purposes such as user manuals, RFCs, etc.
Documentation addresses should not be advertised and should be
filtered out when received.
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2.6. 6to4
2002::/16 are the 6to4 addresses [RFC4291][RFC3056]. The 6to4
addresses may be advertised when the site is running a 6to4 relay or
offering a 6to4 transit service. However, the provider of this
service should be aware of the implications of running such
service[RFC3964], which includes some specific filtering rules for
6to4.
2.7. Teredo
2001::/32 are the Teredo addresses [RFC4380]. The Teredo addresses
may be advertised when the site is running a Teredo relay or offering
a Teredo transit service.
2.8. 6bone
5f00::/8 were the addresses of the first instance of the 6bone
experimental network [RFC1897].
3ffe::/16 were the addresses of the second instance of the 6bone
experimental network [RFC2471].
Both 5f00::/8 and 3ffe::/16 were returned to IANA [RFC3701]. These
addresses are subject to future allocation, similar to current
unallocated address space. These addresses should not be advertised
and should be filtered out when received until they are reallocated.
2.9. Default Route
::/0 is the default unicast route address.
2.10. Multicast
ff00::/8 are multicast addresses [RFC4291]. They have a 4 bits scope
in the address field. Only addresses having the 'E' value in the
scope field are of global scope, all other values are local or
reserved. Therefore, only ffXe:: routes may be advertised outside a
site, where X may be any value.
Multicast routes must not appear in unicast routing tables.
3. Security Considerations
This document list addresses and guidelines associated with them.
The guidelines should improve the security of networks by the
filtering of invalid routing prefixes.
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4. IANA Considerations
This document has no actions for IANA.
5. Acknowledgements
Florent Parent, Pekka Savola, Tim Chown, Alain Baudot, Stig Venaas,
Vincent Jardin, Olaf Bonness, David Green, Gunter Van de Velde,
Michael Barnes, Fred Baker, Edward Lewis, Marla Azinger, Brian
Carpenter, Mark Smith, Kevin Loch and Alain Durand have provided
input and suggestions to this document.
6. Informative References
[RFC1897] Hinden, R. and J. Postel, "IPv6 Testing Address
Allocation", RFC 1897, January 1996.
[RFC2471] Hinden, R., Fink, R., and J. Postel, "IPv6 Testing Address
Allocation", RFC 2471, December 1998.
[RFC3056] Carpenter, B. and K. Moore, "Connection of IPv6 Domains
via IPv4 Clouds", RFC 3056, February 2001.
[RFC3701] Fink, R. and R. Hinden, "6bone (IPv6 Testing Address
Allocation) Phaseout", RFC 3701, March 2004.
[RFC3849] Huston, G., Lord, A., and P. Smith, "IPv6 Address Prefix
Reserved for Documentation", RFC 3849, July 2004.
[RFC3964] Savola, P. and C. Patel, "Security Considerations for
6to4", RFC 3964, December 2004.
[RFC4193] Hinden, R. and B. Haberman, "Unique Local IPv6 Unicast
Addresses", RFC 4193, October 2005.
[RFC4291] Hinden, R. and S. Deering, "IP Version 6 Addressing
Architecture", RFC 4291, February 2006.
[RFC4380] Huitema, C., "Teredo: Tunneling IPv6 over UDP through
Network Address Translations (NATs)", RFC 4380,
February 2006.
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Author's Address
Marc Blanchet
Viagenie
Email: Marc.Blanchet@viagenie.ca
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