This records the offered load, expressed as a percent of line rate, at which this frame-loss measurement was taken, since RFC2544 frame-loss testing is run at specific rate steps (commonly 100%, 90%, 80%, etc.) rather than at a single fixed load. An admin uses this to know exactly how hard the link was being pushed when a given loss percentage was recorded, because a small loss at 100% of line rate is a very different finding than the same loss at only 50% of line rate. For example, cienaCesBenchmarkGenTestSessionFramelossResultsRate = 100 paired with a 0% loss result demonstrates the port can sustain full line rate without dropping frames, which is a much stronger claim than the same 0% loss at a 50% rate.