METRODATA NetTESTER FAMILY USER MANUAL
76-02-107 Rev.A
Page 49 of 133
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Each element of the test for each packet size is awarded a pass or fail by
comparison with the SLA, and these are combined to produce an overall pass/fail
result.
10.3.1.3 Y.1564
Y.1564 [8] defines a testing methodology that is tied directly to the concept of the
SLA, and which addresses the problem (with RFC2544) of excessively long testing
times.
The Y.1564 approach splits the testing process into two main sections: The
Configuration Test is designed to execute quickly and report any readily-apparent
issues; whilst the Performance Test is designed to run for an extended period and
verify the service performance against the SLA with a high degree of confidence.
The Configuration Test is further split into a number of short tests designed to check
individual aspects of the SLA (CIR, CBS, etc).
The testing process is described in detail in the Y.1564 document, and reference to
this is recommended for more information.
Section 14.2.6.4 describes how the Y.1564 test is set-up.
10.3.2
Test Peers
The device performing the loopback operation is referred to as the test peer. This
device can be identified by MAC address (termed a Layer 2 peer) or IP address (a
Layer 3 peer). Identification of Layer 2 peers is aided by a proprietary discovery
protocol. The 'magic MAC' and a special MAC address for use with physical
loopbacks are also available.
10.3.3
Test Reports
The three test regimes produce an output for each time a test is run in the form of a
plain-text report. The report is designed so that it can be viewed as the test is in
progress; the user interface allows for a view that updates in real time. Once the test
has completed, the finished report is available to view. It will also be automatically
sent to a TFTP server, if this has been configured, and saved in a uniquely named
file.
APPENDIX B includes sample test reports.
