This field records how much the counter for FCoE (Fibre Channel over Ethernet) payload bytes received on this converged network adapter's Ethernet uplink increased during the most recent collection interval, rather than the lifetime cumulative total. For a network admin, a rising rate here confirms storage traffic is actually flowing over the FCoE-encapsulated link rather than sitting idle or being routed elsewhere. For example, a value of 340,835 bytes would mean that much FCoE data crossed this uplink in just the last collection interval.