Testing Satellite Attached Implementations Using ITF and SDTF
The number of networks which contain satellite attached network components (products, devices, controllers, etc.) is increasing at a rapid pace. Both the Internetworking Test Facility (ITF) and the SNA Development Test Facility (SDTF) are ideal tools to test, exercise, validate, measure performance, and aid in problem determination of these components.
ITF and SDTF provide the following types of tests and functions:
- Host Simulation
- Protocol Conformance
- Implementation Functionality
- Performance and Stress
ITF and SDTF can be used to:
- Perform QA testing of components to be used in satellite networks
- Evaluate and qualify components which are candidates to be added to networks
- Perform problem determination and exercising of components
- Perform performance and functionality testing of components
- Perform regression testing of new component software releases
ITF and SDTF both offer high function economical host simulation using a PC.
ITF may be used to generate data streams for the following components:
- TN3270, TN3270E, TN5250, Telnet, and User Defined
using the following protocols:
- Ethernet, Token Ring, SLIP, and PPP
SDTF may be used to generate the data streams for the following components:
- 3270, 5250, RJE, LU0, APPC, APPN, and User Defined
using the following protocols:
- Ethernet, Token Ring, SDLC, and X.25 QLLC
Testing of many networks can utilize the functions of both ITF and SDTF.
Testing Methodology
The following methodology is suggested for testing satellite attached components
- Run tests without the satellite links, using ITF or SDTF at Test Point 1
- Run tests with the satellite links in place, using ITF or SDTF at Test Point 2.
The protocol and functionality tests should run identically. The performance tests will normally exhibit a level of degradation and should be reviewed to determine if the results are acceptable.
ITF and SDTF Parameter Setup
ITF and SDTF both have a number of menu selectable parameters which can effect operations.
- The 'timing' parameters should be altered to both minimum and maximum values.
- The buffer sizes should be varied to determine the optimal size
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Last Updated: Aug. 10, 2000 http://www.acomtech.com/satelink.html