This read-only PerfCounter64 counts unicast frames sent out over this link aggregation group during the interval. As the dominant traffic type in most networks, it gives an administrator the primary outbound throughput figure to watch for a bonded link carrying normal point-to-point application traffic. For example, a sudden drop in cmLagStatsESUF while broadcast and multicast counts stay level would suggest a specific unicast application or path has stopped sending traffic.