Network Working Group W. Ivancic Internet-Draft NASA GRC Intended status: Informational W. Eddy Expires: June 16, 2014 MTI Systems A. Hylton D. Iannicca J. Ishac NASA GRC December 13, 2013 Store, Carry and Forward Testing Requirements draft-ivancic-scf-testing-requirements-01 Abstract This document provides guidelines and requirements for testing Store, Carry and Forward (SCF) systems and protocols. The Testing Requirements document is one of three that fully describe the SCF system. The other two are the SCF Problem Statement and the SCF Requirements and Expectations document. This initial document is currently just a skeletal outline, published so the other two SCF documents can reference it. 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 June 16, 2014. Ivancic, et al. Expires June 16, 2014 [Page 1] Internet-Draft SCF Testing Requirements December 2013 Copyright Notice Copyright (c) 2013 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 Simplified BSD License. This document may not be modified, and derivative works of it may not be created, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 3. Test System . . . . . . . . . . . . . . . . . . . . . . . . . 3 4. Test Requirements . . . . . . . . . . . . . . . . . . . . . . 4 5. Security Considerations . . . . . . . . . . . . . . . . . . . 4 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4 8. Informative References . . . . . . . . . . . . . . . . . . . 4 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5 1. Terminology Detailed terminology is given in the SCF Requirements and Expectations document [I-D.ivancic-scf-requirements-expectations] and will not be repeated here. 2. Introduction As background, the SCF Problem Statement and SCF Requirements and Expectations documents are suggested reading. The SCF Problem Statement describes the core SCF problem and gives an assessment of the ability to use existing technologies as solutions. In addition, it provides a number of SCF deployment scenarios. In RFC760, one can find what has become know as Postel's Law or the Robustness Principle, "In general, an implementation should be conservative in its sending behavior, and liberal in its receiving Ivancic, et al. Expires June 16, 2014 [Page 2] Internet-Draft SCF Testing Requirements December 2013 behavior." This rule was originally targeting protocol implementation. A corresponding rule for testing may be, "If you claim the protocol can do it, you have to prove it - test it." Conversely, being able to simply ping an end system does not indicate the network is fully functional. It just means that there is connectivity and the potential for the network to be fully functional. The primary motivation for developing this document is to establish thorough, repeatable, tests that will fully exercise a SCF system. Past experience has shown that testing of SCF systems is too often inadequate. For example, tests have been performed on SCF systems in fully-connected, high-bandwidth networks where only forwarding would be exercised, or the traffic would be so minimal as to never tax the storage or queueing. Such tests are valid as a starting point, but insufficient to determine that a protocol or implementation will working properly in a reasonably-scaled deployment. A secondary motivation is to improve implementations by providing a known test environment. Knowing some possible ways that the protocol and system will be evaluated may help establish how the code is developed, as well as identifying hooks for monitoring particular processes. 3. Test System Figure 1 illustrates a generic testbed for testing may aspects of the SCF protocol. The systems consists of 12 SCF agents and 16 links. Any or all of the links may be disconnected at any given time. Even though the system is simple, some complexity is necessary because the system must accommodate testing of aggregation, deaggregation, and fragmentation with multiple container flows of various sizes and priorities. Ivancic, et al. Expires June 16, 2014 [Page 3] Internet-Draft SCF Testing Requirements December 2013 +------+ +------+ +------+ |SCF-1 | /|SCF-5 |`. ./|SCF-10| +------+\ / +------+ \ .-' /+------+ \ / `. +------+.' / `. .' `.|SCF-8 |`. / \ / .'+------+\ `+. +------+ \+------+/ +------+ .-' \/ `.+------+ |SCF-2 |......|SCF-4 |.......|SCF-6 |:: |\ |SCF-11| +------+ /+------+\ +------+ \ / | .'+------+ / \ `. +------+/ .+' / \ ::|SCF-9 |.' \ .' `. / +------+`. \ +------+/ \ +------+ .' `-. \+------+ |SCF-3 | \|SCF-7 |.' `.|SCF-12| +------+ +------+ +------+ SCF Test Network/postamble Figure 1 4. Test Requirements List requirements and test for each of the protocol requirements in the "SCF Requirements and Expectations" document . 5. Security Considerations This document is informative and provides guidelines and Requirements for testing SCF systems and protocols. There are no security considerations. 6. IANA Considerations This document neither creates nor updates any registries or codepoints, so there are no IANA Considerations. 7. Acknowledgements Work on this document at NASA's Glenn Research Center was funded by the NASA Glenn Research Center Innovation Funds. 8. Informative References [I-D.ivancic-scf-problem-statement] Ivancic, W., Eddy, W., Iannicca, D., and J. Ishac, "Store, Carry and Forward Problem Statement", draft-ivancic-scf- problem-statement-00 (work in progress), July 2012. Ivancic, et al. Expires June 16, 2014 [Page 4] Internet-Draft SCF Testing Requirements December 2013 [I-D.ivancic-scf-requirements-expectations] Ivancic, W., Eddy, W., Iannicca, D., and J. Ishac, "Store, Carry and Forward Requirements and Expectations", draft- ivancic-scf-requirements-expectations-00 (work in progress), July 2012. [RFC4838] Cerf, V., Burleigh, S., Hooke, A., Torgerson, L., Durst, R., Scott, K., Fall, K., and H. Weiss, "Delay-Tolerant Networking Architecture", RFC 4838, April 2007. [RFC5050] Scott, K. and S. Burleigh, "Bundle Protocol Specification", RFC 5050, November 2007. Authors' Addresses William Ivancic NASA Glenn Research Center 21000 Brookpark Road Cleveland, Ohio 44135 United States Phone: +1-216-433-3494 Email: william.d.ivancic@nasa.gov Wesley M. Eddy MTI Systems Email: wes@mti-systems.com Alan G. Hylton NASA Glenn Research Center 21000 Brookpark Road Cleveland, Ohio 44135 United States Phone: +1-216-433-6045 Email: alan.g.hylton@nasa.gov Ivancic, et al. Expires June 16, 2014 [Page 5] Internet-Draft SCF Testing Requirements December 2013 Dennis C. Iannicca NASA Glenn Research Center 21000 Brookpark Road Cleveland, Ohio 44135 United States Phone: +1-216-433-6493 Email: dennis.c.iannicca@nasa.gov Joseph A. Ishac NASA Glenn Research Center 21000 Brookpark Road Cleveland, Ohio 44135 United States Phone: +1-216-433-6587 Email: jishac@nasa.gov Ivancic, et al. Expires June 16, 2014 [Page 6]