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User Guide
158
7.1.8. Generation of RFC 2544 Result Reports
An essential part of standardized network testing is report generation. Reports
summarize test results in a document that can be edited or shared with the customer.
RFC 2544 reports include a text header with basic information about the test like start
time, duration and configuration. Test results are presented in tables. There is one table
for each test: throughput, latency, frame loss, back-to-back frames and system
recovery time. All results include a Pass / Fail indication. The report also includes a
global Pass / Fail indication which summarizes all test results: It follows an example of
a typical RFC 2544 report as is generated by the test unit:
Measured max rate
(fr/s)
Measured maximum rate attainable in the transmission
medium expressed in frames per second. This result is
always smaller or equal than the theoretical maximum rate
result.
The measured maximum rate result is available in the
Throughput test result table
Delay (s) Latency result measured in microseconds. The delay result
has to be understood as the one-way delay if the test is con-
figured as a One-way (A > B), Upstream or Downstream test
or as the round-trip delay if the test is configured as Two-way
(A > A). In many setups the round-trip delay is roughly twice
that the one-way delay but in asymmetric setups this is not
true anymore.
Delay var (s) Delay variation measured in microseconds. The delay varia-
tion is computed as specified in IETF RFC 3393 and it is to
be understood as a one-way delay metric if the test is config-
ured as a One-way (A > B), Upstream or Downstream test or
as a two-way metric if the test method is Two-way (A > A). In
asymmetric tests this metric is also one-way and corre-
sponds to the upstream or downstream path depending on
the configure test method.
Frame loss (%) Frame loss result expressed as a percentage of the total
amount of frames transmitted in the trial for an specific frame
length and throughput.
Burst length (fr) Longest burst accepted by the DUT / SUT which produces
no packet loss.
Recovery time (s) Time invested to recover from an overload condition
expressed in microseconds.
Table 7.7: RFC 2544 Test Results
Setting Description
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