Exactly as described, this is a running total of broadcast packets received on this benchmark port. Like the multicast counter, this typically reflects background ARP or other broadcast traffic sharing the port rather than the benchmark payload itself, so an operator troubleshooting frame loss should rule this counter's contribution out before concluding the test traffic itself is affected. For example, a small, steady trickle of broadcast packets here throughout an otherwise clean test run is consistent with routine ARP refresh traffic and not a sign of a test problem.