Network Working Group M. Boc Internet-Draft C. Janneteau Intended status: Informational A. Petrescu Expires: January 5, 2012 CEA LIST July 4, 2011 RO Extensions for PMIPv6-LR (ROEXT) draft-boc-netext-lr-roext-00.txt Abstract The communication path between two Hosts within a Proxy Mobile IPv6 domain is artificially long - it involves the LMA, even if straight paths exist (under same MAG, or MAG-to-MAG). Localized Routing PMIPv6-LR concepts developped by NETEXT WG make use of LRI/LRA messages to achieve optimized MAG-to-MAG straight paths. This may prove inconvenient for the network operator, in that it may loose ability to control traffic (LMA is skipped). In this draft we present a middle-ground solution. It employs new Intermediary Anchors (IAs) in the paths between MAGs and offers points of control of traffic useful for QoS and lawful interception. Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. 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 January 5, 2012. Copyright Notice Copyright (c) 2011 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 Boc, et al. Expires January 5, 2012 [Page 1] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 (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 Simplified BSD License. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Boc, et al. Expires January 5, 2012 [Page 2] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 Table of Contents 1. Requirements notation . . . . . . . . . . . . . . . . . . . . 4 2. Concentrated Description . . . . . . . . . . . . . . . . . . . 5 3. Security Considerations . . . . . . . . . . . . . . . . . . . 9 4. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 10 5. Normative References . . . . . . . . . . . . . . . . . . . . . 11 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 12 Boc, et al. Expires January 5, 2012 [Page 3] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 1. Requirements notation The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. Boc, et al. Expires January 5, 2012 [Page 4] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 2. Concentrated Description The work presented in this draft is developped in the context of Proxy Mobile IPv6 [RFC5213] and uses LRI/LRA messages used by Localized Routing [I-D.ietf-netext-pmip-lr]. The relevant scenarios are represented by communication between two Hosts typically situated each under a different MAG. ----- ----- | LMA | | LMA | ----- ----- / \ / \ / / \ \ / \ / / \ \ / \signalling / /T1 \ \T2 / \ / \ / \ ----- ----- / \ | MAG1| | MAG2| / \ ----- ----- ----- ================== ----- | | | MAG1| Direct Tunnel | MAG2| | | ----- ----- --|-- --|-- | | |Host1| |Host2| --|-- --|-- ----- ----- |Host1| |Host2| ----- ----- In this figure, on the left side, the established tunnels T1 and T2 for communication between Host1 and Host2 are shown, after the Proxy Mobile IPv6 protocol has executed. Each tunnel is established between LMA and the MAG under which a Host is attached. This illustration is typically used to express a problem of too long communication paths. In the right part of the same figure, the Direct Tunnel between two MAGs is illustrated as a solution to the problem above. This is achieved by using Localized Routing concepts of Proxy Mobile IPv6. The diagonal lines represent signalling (not wires). There may exist situations when MAG-LMA-MAG communication paths are too long and yet the straight MAG-MAG paths may prove disadvantageous in terms of loss of operator control on various aspects of the traffic. A middle ground solution as for an bent arch path (not fully triangular, not fully straight) may be needed. Boc, et al. Expires January 5, 2012 [Page 5] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 ----- | LMA | ----- / \ / \ / \signalling / \ / \ / \ / ---- \ ----- =====| IA |======= ----- | MAG | T1 ---- T2 | MAG | ----- ----- | | --|-- --|-- |Host1| |Host2| ----- ----- In this figure a new entity is added between MAGs - the Intermediate Anchor (IA). The tunnels T1 and T2 are established between the IA and the two MAGs respectively (instead of LMA). The IA serves purposes such as ensuring a certain level of control over the route optimized traffic, such as providing a certain level of Quality-of- Service, or, potentially, enabling data traffic enforcement for lawful interception. Several such IAs may be placed at strategic points within the Proxy Mobile IPv6 domain. H1 H2 MAG1 MAG2 IA1 IA2 LMA | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Boc, et al. Expires January 5, 2012 [Page 6] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 Explanation of message exchange diagram for initiating a path through several IAs. H1 H2 MAG1 MAG2 IA1 IA2 LMA | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Explanation of message exchange diagram for updating the path through several IAs. The following diagram shows a modified LRI message. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Sequence # | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |R|S|I| Reserved | Lifetime | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | . . . Mobility options . . . | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Boc, et al. Expires January 5, 2012 [Page 7] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 'I' flag: if set to 1 it indicates that this message is for an Intermediate Anchor. The following diagram shows a modified LRA message. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Sequence # | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |R|U|I| Reserved| Status | Lifetime | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | . . . Mobility options . . . | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 'I' flag: if set to 1 it indicates that this message is is sent by an Intermediate Anchor. Boc, et al. Expires January 5, 2012 [Page 8] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 3. Security Considerations Security aspects of LRI messages and of lawful interception. Boc, et al. Expires January 5, 2012 [Page 9] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 4. Acknowledgements Personal acks. Project name and sponsor tags. Boc, et al. Expires January 5, 2012 [Page 10] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 5. Normative References [I-D.ietf-netext-pmip-lr] Krishnan, S., Koodli, R., Loureiro, P., Wu, W., and A. Dutta, "Localized Routing for Proxy Mobile IPv6", draft-ietf-netext-pmip-lr-03 (work in progress), June 2011. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC5213] Gundavelli, S., Leung, K., Devarapalli, V., Chowdhury, K., and B. Patil, "Proxy Mobile IPv6", RFC 5213, August 2008. Boc, et al. Expires January 5, 2012 [Page 11] Internet-Draft RO Extensions for PMIPv6-LR (ROEXT) July 2011 Authors' Addresses Michael Mathias Boc CEA LIST Communicating Systems Laboratory, Point Courrier 94 Gif-sur-Yvette, F-91191 France Phone: +33 169083976 Email: michael.boc@cea.fr Christophe Janneteau CEA LIST Communicating Systems Laboratory, Point Courrier 94 Gif-sur-Yvette, F-91191 France Phone: +33 169089182 Email: christophe.janneteau@cea.fr Alexandru Petrescu CEA LIST Communicating Systems Laboratory, Point Courrier 94 Gif-sur-Yvette, F-91191 France Phone: +33 169089223 Email: alexandru.petrescu@cea.fr Boc, et al. Expires January 5, 2012 [Page 12]