Network Working Group A. Morton Internet-Draft AT&T Labs Updates: 4656 (if approved) July 24, 2015 Intended status: Standards Track Expires: January 25, 2016 Registries for the One-Way Active Measurement Protocol - OWAMP draft-ietf-ippm-owamp-registry-00 Abstract This memo describes the registries for OWAMP - the One-Way Active Measurement Protocol. The registries allow assignment of MODE bit positions and OWAMP Command numbers. The memo also requests that IANA establish the registries for new features, called the OWAMP- Modes registry and the OWAMP Control Command Number registry. Requirements Language 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 RFC 2119 [RFC2119]. 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 25, 2016. Copyright Notice Copyright (c) 2015 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 Morton Expires January 25, 2016 [Page 1]
Internet-Draft TWAMP Extensions July 2015 (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. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Purpose and Scope . . . . . . . . . . . . . . . . . . . . . . 3 3. IANA Considerations for OWAMP Control Registries . . . . . . 3 3.1. Control Command Number Registry . . . . . . . . . . . . . 3 3.1.1. Registry Specification . . . . . . . . . . . . . . . 3 3.1.2. Registry Management . . . . . . . . . . . . . . . . . 3 3.1.3. Experimental Numbers . . . . . . . . . . . . . . . . 4 3.1.4. OWAMP-Control Command Numbers Initial Contents . . . 4 3.2. OWAMP-Modes . . . . . . . . . . . . . . . . . . . . . . . 4 3.2.1. Registry Specification . . . . . . . . . . . . . . . 4 3.2.2. Registry Management . . . . . . . . . . . . . . . . . 4 3.2.3. Experimental Numbers . . . . . . . . . . . . . . . . 5 3.2.4. OWAMP-Modes Initial Contents . . . . . . . . . . . . 5 4. Security Considerations . . . . . . . . . . . . . . . . . . . 6 5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 6 6.1. Normative References . . . . . . . . . . . . . . . . . . 6 6.2. Informative References . . . . . . . . . . . . . . . . . 7 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 7 1. Introduction The One-way Active Measurement Protocol, OWAMP [RFC4656] was prepared to support measurements of metrics specified by the IP Performance Metrics (IPPM) working group in the IETF. The Two-Way Active Measurement Protocol, TWAMP [RFC5357] is an extension of OWAMP. The Morton Expires January 25, 2016 [Page 2]
Internet-Draft TWAMP Extensions July 2015 TWAMP specification gathered wide review as it approached completion, and the by-products were several recommendations for new features in TWAMP. As a result, a registry of new features was established for TWAMP. However, there were no new features proposed for OWAMP until recently. This memo establishes the needed registries for OWAMP, and updates [RFC4656]. 2. Purpose and Scope The purpose and scope of this memo is to describe and request the establishment of registries for future OWAMP [RFC4656] extensions. IANA already administrates the "Two-way Active Measurement Protocol (TWAMP) Parameters", and this request follows a similar form (with one exception identified below). This memo also provides the initial contents for the registries. 3. IANA Considerations for OWAMP Control Registries OWAMP-Control protocol coordinates the measurement capability. All OWAMP-Control messages follow specifications defined in section 3 of [RFC4656]. 3.1. Control Command Number Registry IANA is requested to create a OWAMP-Control Command Number registry. OWAMP-Control Commands follow specifications defined in section 3.4 of [RFC4656]. 3.1.1. Registry Specification OWAMP-Control Commands Numbers are specified in the first octet of OWAMP-Control-Client command messages consistent with section 3 of [RFC4656]. There are a maximum of 256 command numbers. 3.1.2. Registry Management Because the "OWAMP-Control Command Numbers" registry can contain only 256 values, and because OWAMP is an IETF protocol, these registries must be updated only by "IETF Consensus" as specified in [RFC5226] (an RFC that documents registry use and is approved by the IESG). Morton Expires January 25, 2016 [Page 3]
Internet-Draft TWAMP Extensions July 2015 3.1.3. Experimental Numbers One experimental value is currently assigned in the Command Numbers Registry, as indicated in the initial contents below. 3.1.4. OWAMP-Control Command Numbers Initial Contents OWAMP-Control Commands follows the procedure defined in section 3.5 of [RFC4656] (and in the remainder of section 3). The complete set of OWAMP-Control Command Numbers are as follows (including one reserved bit position): OWAMP-Control Command Numbers Registry Value Description Semantics Definition 0 Reserved 1 Request-Session RFC 4656, Section 3.5 2 Start-Sessions RFC 4656, Section 3.7 3 Stop-Sessions RFC 4656, Section 3.8 4 Fetch-Sessions RFC 4656, Section 3.9 5 Experimentation This Memo 6-255 Unassigned 3.2. OWAMP-Modes IANA is requested to create a OWAMP-Modes registry. 3.2.1. Registry Specification OWAMP-Modes are specified in OWAMP Server Greeting messages and Set- up Response messages consistent with section 3.1 of [RFC4656]. Modes are currently indicated by setting single bits in the 32-bit Modes Field. However, more complex encoding may be used in the future. 3.2.2. Registry Management Because the "OWAMP-Modes" are based on only 32 bit positions with each position conveying a unique feature, and because TWAMP is an IETF protocol, these registries must be updated only by "IETF Consensus" as specified in [RFC5226] (an RFC that documents registry use and is approved by the IESG). Morton Expires January 25, 2016 [Page 4]
Internet-Draft TWAMP Extensions July 2015 3.2.3. Experimental Numbers No experimental bit positions are currently assigned in the Modes Registry, as indicated in the initial contents below. 3.2.4. OWAMP-Modes Initial Contents OWAMP-Control connection establishment follows the procedure defined in section 3.1 of [RFC4656]. In the OWAMP-Modes registry, assignments are straightforward on the basis of bit positions, and there are no references to values - this is a difference from the comparable TWAMP registry (and a topic for improvement in the TWAMP-Modes registry). An Extension of the OWAMP-Modes is proposed in [I-D.ietf-ippm-ipsec]. With this extension, the complete set of OWAMP Mode bit positions are as follows (including one reserved bit position): OWAMP-Modes Registry Bit Posit. Description Reference/Explanation 0 Unauthenticated RFC4656, Section 3.1 1 Authenticated RFC4656, Section 3.1 2 Encrypted RFC4656, Section 3.1 3 Reserved bit position (3) 4 IKEv2-derived Shared RFC_TBD and this memo Secret Key new bit position (4) 5-31 Unassigned In the original OWAMP and TWAMP Modes field, setting bit position 0, 1 or 2 indicated the security mode of the Control protocol, and the Test protocol inherited the same mode (see section 4 of [RFC4656]). The value of the Modes Field sent by the Server in the Server- Greeting message is the bit-wise OR of the modes (bit positions) that it is willing to support during this session. Thus, the last four bits of the Modes 32-bit Field are used. When no other features are activated, the first 28 bits MUST be zero. A client conforming to this extension of [RFC5357] MAY ignore the values in the first 28 bits of the Modes Field, or it MAY support other features that are communicated in these bit positions. OWAMP and TWAMP registries for Modes may grow to contain different features and functions due to the inherent differences in one-way and two-way measurement configurations and the metrics they measure. No Morton Expires January 25, 2016 [Page 5]
Internet-Draft TWAMP Extensions July 2015 attempt will be made to coordinate them unnecessarily, except the Reserved bit position 3 above. This is available for assignment if a mixed security mode [RFC5618] is defined for OWAMP, and would allow alignment with the comparable TWAMP feature. 4. Security Considerations As this memo simply requests creation of a registry, it presents no new security or privacy issues for the Internet. The security considerations that apply to any active measurement of live networks are relevant here as well. See [RFC4656] and [RFC5357]. Privacy considerations for measurement systems, particularly when Internet users participate in the tests in some way, are described in [I-D.ietf-lmap-framework]. 5. Acknowledgements The author would like to thank Kostas Pentikousis, Nalini Elkins, and Mike Ackermann for insightful reviews and comments. 6. References 6.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, <http://www.rfc-editor.org/info/rfc2119>. [RFC4656] Shalunov, S., Teitelbaum, B., Karp, A., Boote, J., and M. Zekauskas, "A One-way Active Measurement Protocol (OWAMP)", RFC 4656, DOI 10.17487/RFC4656, September 2006, <http://www.rfc-editor.org/info/rfc4656>. [RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 5226, DOI 10.17487/RFC5226, May 2008, <http://www.rfc-editor.org/info/rfc5226>. [RFC5357] Hedayat, K., Krzanowski, R., Morton, A., Yum, K., and J. Babiarz, "A Two-Way Active Measurement Protocol (TWAMP)", RFC 5357, DOI 10.17487/RFC5357, October 2008, <http://www.rfc-editor.org/info/rfc5357>. Morton Expires January 25, 2016 [Page 6]
Internet-Draft TWAMP Extensions July 2015 6.2. Informative References [I-D.ietf-ippm-ipsec] Pentikousis, K., Zhang, E., and Y. Cui, "IKEv2-derived Shared Secret Key for O/TWAMP", draft-ietf-ippm-ipsec-10 (work in progress), May 2015. [I-D.ietf-lmap-framework] Eardley, P., Morton, A., Bagnulo, M., Burbridge, T., Aitken, P., and A. Akhter, "A framework for Large-Scale Measurement of Broadband Performance (LMAP)", draft-ietf- lmap-framework-14 (work in progress), April 2015. [RFC5618] Morton, A. and K. Hedayat, "Mixed Security Mode for the Two-Way Active Measurement Protocol (TWAMP)", RFC 5618, DOI 10.17487/RFC5618, August 2009, <http://www.rfc-editor.org/info/rfc5618>. Author's Address Al Morton AT&T Labs 200 Laurel Avenue South Middletown,, NJ 07748 USA Phone: +1 732 420 1571 Fax: +1 732 368 1192 Email: acmorton@att.com URI: http://home.comcast.net/~acmacm/ Morton Expires January 25, 2016 [Page 7]
