This records the percentage of frames lost specifically on the first test sequence run at the configured rate and frame size, kept separate from the second-sequence result because RFC2544 frame-loss methodology runs the measurement at least twice at each point to check for consistency. An admin compares this to cienaCesBenchmarkGenTestSessionFramelossResultsSecond to check whether the loss rate is stable and repeatable rather than a one-off glitch. For example, a first-sequence result of 0.5% loss followed by a second-sequence result of 4% loss at the same rate would flag an inconsistent, possibly congestion-related result worth re-testing rather than trusting either number alone.