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
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on June 16, 2014.
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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
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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.
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+------+ +------+ +------+
|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.
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[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
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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
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