v6 has subnet anycast... done and done!
never published
Network Working Group R. Bush
Internet-Draft IIJ
Intended status: Standards Track August 2010
Expires: February 2, 2011
IPv6 Subnet Anycast Deprecated
draft-ymbk-no-subnet-anycast-00
Abstract
IPv6 subnet anycast is not used operationally, complicates
implementations, and complicates protocol specifications. The form
of anycast actually used in the Internet is routing-based, and is
essentilly the same as that of IPv4 anycast. Therefore, this
document deprecates IPv6 subnet anycast.
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79. This document may not be modified,
and derivative works of it may not be created, and it may not be
published except as an Internet-Draft.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
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."
This Internet-Draft will expire on February 2, 2011.
Copyright Notice
Copyright (c) 2010 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
Bush Expires February 2, 2011 [Page 1]
Internet-Draft IPv6 Subnet Anycast Deprecated August 2010
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Security Considerations . . . . . . . . . . . . . . . . . . . . 3
3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3
4. References . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4.1. Normative References . . . . . . . . . . . . . . . . . . . 3
4.2. Informative References . . . . . . . . . . . . . . . . . . 3
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 4
Bush Expires February 2, 2011 [Page 2]
Internet-Draft IPv6 Subnet Anycast Deprecated August 2010
1. Introduction
The form of anycast which is used in the operational internet is
described in [RFC4786]. This is used widely in IPv4 and IPv6. To
quote,
"To distribute a service using anycast, the service is first
associated with a stable set of IP addresses, and reachability to
those addresses is advertised in a routing system from multiple,
independent service nodes."
IPv6 subnet anycast, as defined in [RFC2526], complicates host and
router stacks. It also makes address assignment unnecessarily
complex, see [I-D.kohno-ipv6-prefixlen-p2p].
IPv6 subnet anycast is not actually used or deployed. In this case,
it is sure that implementations are not even debugged.
Therefore, this document deprecates IPv6 subnet anycast and removes
conformance requirements from host and router implementations.
2. Security Considerations
There are no known security implications for this document.
3. IANA Considerations
This document has no IANA Considerations.
4. References
4.1. Normative References
[RFC2526] Johnson, D. and S. Deering, "Reserved IPv6 Subnet Anycast
Addresses", RFC 2526, March 1999.
4.2. Informative References
[I-D.kohno-ipv6-prefixlen-p2p]
Kohno, M., Nitzan, B., Bush, R., Matsuzaki, Y., and L.
Colitti, "Using 127-bit IPv6 Prefixes on Inter-Router
Links", draft-kohno-ipv6-prefixlen-p2p-02 (work in
progress), July 2010.
[RFC4786] Abley, J. and K. Lindqvist, "Operation of Anycast
Bush Expires February 2, 2011 [Page 3]
Internet-Draft IPv6 Subnet Anycast Deprecated August 2010
Services", BCP 126, RFC 4786, December 2006.
Author's Address
Randy Bush
Internet Initiative Japan, Inc.
5147 Crystal Springs
Bainbridge Island, Washington 98110
US
Phone: +1 206 780 0431 x1
Email: randy@psg.com
Bush Expires February 2, 2011 [Page 4]
In all seriousness, we are starting to set the