Deprecating the Anycast Prefix for 6to4 Relay Routers (RFC7526)
Original Publication Date: 2015-May-01
Included in the Prior Art Database: 2015-May-21
Internet Society Requests For Comment (RFCs)
O. Troan: AUTHOR [+3]
The original form of the 6to4 transition mechanism [RFC3056] relies on unicast addressing. However, its extension specified in "An Anycast Prefix for 6to4 Relay Routers" [RFC3068] has been shown to have severe practical problems when used in the Internet. This document requests that RFCs 3068 and 6732 be moved to Historic status, as defined in Section 4.2.4 of [RFC2026]. It complements the deployment guidelines in [RFC6343].
Internet Engineering Task Force (IETF) O. Troan Request for Comments: 7526 Cisco BCP: 196 B. Carpenter, Ed. Obsoletes: 3068, 6732 Univ. of Auckland Category: Best Current Practice May 2015 ISSN: 2070-1721
Deprecating the Anycast Prefix for 6to4 Relay Routers
Experience with the 6to4 transition mechanism defined in RFC 3056 ("Connection of IPv6 Domains via IPv4 Clouds") has shown that the mechanism is unsuitable for widespread deployment and use in the Internet when used in its anycast mode. Therefore, this document requests that RFC 3068 ("An Anycast Prefix for 6to4 Relay Routers") and RFC 6732 ("6to4 Provider Managed Tunnels") be made obsolete and moved to Historic status. It recommends that future products should not support 6to4 anycast and that existing deployments should be reviewed. This complements the guidelines in RFC 6343.
Status of This Memo
This memo documents an Internet Best Current Practice.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on BCPs is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7526.
Troan & Carpenter Best Current Practice [Page 1]
RFC 7526 Deprecating 6to4 Anycast May 2015
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Related Work . . . . . . . . . . . . . . . . . . . . . . 3