This OID reports, as an Unsigned64 counter, the running total of traffic sent outbound on a Fabric Interconnect physical interface. An admin watches this counter's growth rate to judge how much outbound load a specific switch port is carrying, which matters when diagnosing an uplink that appears saturated in one direction. For example, a port whose outbound counter grows far faster than its inbound counter over the same period points to that link being the exit path for a large outbound data transfer.