Network Working Group R. Whittle Internet-Draft First Principles Intended status: Experimental February 26, 2010 Expires: August 30, 2010 DRTM - Distributed Real Time Mapping for Ivip and LISP draft-whittle-ivip-drtm-00.txt Abstract Distributed Real Time Mapping (DRTM) is intended for Ivip, but may be useful for other Core-Edge Separation solutions to the routing scaling problem, such as LISP. Companies which operate MABs (Mapped Address Blocks) of "edge" SPI (Scalable PI) address space establish a number of widely dispersed sites from which to operate DITRs (Default ITRs in the DFZ). These DITRs are required to tunnel packets sent from hosts in networks without ITRs. DITRs are caching ITRs closely connected to mapping query servers which are sent a real-time feed of mapping updates for all the MABs the site supports. By making this, or a similar, query server publicly available, caching Map Resolvers (MRs) in nearby ISP networks can resolve the mapping queries of the ITRs in that ISP's network, and in the end-user networks which use this ISP. The DITR-Site mapping servers securely inform MRs of any changes to mapping which occur during the caching time of the map replies, and the MRs perform the same algorithm and pass the updated mapping to the one or more ITRs which is caching the mapping returned in the original reply. In this way, the tunneling behaviour of all ITRs the world over is controlled in real-time. Unlike previous approaches to Ivip's mapping distribution system, there is no need for mapping servers which contain the full database of mapping for all MABs. Nor is there a need for real-time mapping feeds to ISPs. Since the MABOC companies typically come most of the distance to ISPs all over the world, with their DITR sites, these DITR site query servers are typically close enough and numerous enough to scale well and provide very rapid mapping replies, with little loss of packets. This avoids the "lost and delayed initial packets" problem inherent in global query server systems such as LISP-ALT. Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Whittle Expires August 30, 2010 [Page 1] Internet-Draft Distributed Real Time Mapping February 2010 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." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on August 30, 2010. 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 the Trust Legal Provisions and are provided without warranty as described in the BSD License. Whittle Expires August 30, 2010 [Page 2] Internet-Draft Distributed Real Time Mapping February 2010 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Security Considerations . . . . . . . . . . . . . . . . . . . . 5 3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6 4. Informative References . . . . . . . . . . . . . . . . . . . . 7 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 8 Whittle Expires August 30, 2010 [Page 3] Internet-Draft Distributed Real Time Mapping February 2010 1. Introduction This document is a placeholder. Please refer to the description of DRTM on the ITRF Routing Research Group mailing list (2010-02-26]: http://www.ietf.org/mail-archive/web/rrg/current/msg06128.html and any discussion which results. Whittle Expires August 30, 2010 [Page 4] Internet-Draft Distributed Real Time Mapping February 2010 2. Security Considerations None. Whittle Expires August 30, 2010 [Page 5] Internet-Draft Distributed Real Time Mapping February 2010 3. IANA Considerations None. Whittle Expires August 30, 2010 [Page 6] Internet-Draft Distributed Real Time Mapping February 2010 4. Informative References [I-D.irtf-rrg-recommendation] Li, T., "Recommendation for a Routing Architecture", draft-irtf-rrg-recommendation-03 (work in progress), December 2009. Whittle Expires August 30, 2010 [Page 7] Internet-Draft Distributed Real Time Mapping February 2010 Author's Address Robin Whittle First Principles Email: rw@firstpr.com.au URI: http://www.firstpr.com.au/ip/ivip/ Whittle Expires August 30, 2010 [Page 8]