A new and distinct cultivar of Begonia plant named \u2018Elektra White\u2019, characterized by its upright and mounded plant habit; freely branching habit; double flowers that are white in color and held above and beyond the foliage; and excellent postproduction longevity. A coupling and a complementary coupling are provided for restraining the support element in the female coupling element and include a pin and a catch seat, respectively, and a resilient member are also provided for urging the pin into the catch seat so as to prevent accidental disengagement of the coupling and the complementary coupling. A transmission case defines a belt chamber accommodating the primary sheave, secondary sheave, and resin block belt. The first and second die shoes are matable to form a stamped component. Lanthanum and silicon may be co-evaporated. Another embodiment of a method involves detecting an identifier change and, subsequent to the identifier change, sending a link aggregation protocol PDU that includes an \u201cold device identifier\u201d field dedicated to conveying an old identifier.