Network Working Group W. Ivancic
Internet-Draft NASA GRC
Intended status: Experimental W. Eddy
Expires: January 10, 2013 MTI Systems
A. Hylton
D. Iannicca
J. Ishac
NASA GRC
July 9, 2012
Store, Carry and Forward Testing Requirements
draft-ivancic-scf-testing-requirements-00
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 document -00 is currently just an Skeletal Outline published so
the other two SCF documents can reference it. The skeleton will be
filled in within the next month.
Status of this Memo
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Copyright Notice
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Internet-Draft SCF Testing Requirements July 2012
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Table of Contents
1. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Test System . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Test Requirements . . . . . . . . . . . . . . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 4
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 5
8. Normative References . . . . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5
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1. Terminology
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].
Detailed terminology is given in the SCF Requirements and
Expectations document and will not be repeated here.
2. Introduction
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.
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 fine what has become know as Postel's Law or the
Robustness Principal, "In general, an implementation should be
conservative in its sending behavior, and liberal in its receiving
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 PING an end system does not indicate the
network is fully functional. It just means there is connectivity and
a potential that the network is 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 to often be
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
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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, it is still rather complex but the
complexity is necessary because the system must accommodate testing
of aggregation, deaggregation, and fragmentation with multiple
container flows of various sizes and priorities.
+------+ +------+ +------+
|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
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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. Many thanks to
Denise Ponchak for aiding in obtaining financial supporting for this
activity.
8. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
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
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Alan G. Hilton
NASA Glenn Research Center
21000 Brookpark Road
Cleveland, Ohio 44135
United States
Phone: +1-216-433-6045
Email: alan.g.hylton@nasa.gov
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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