This object is a read-only counter that tracks the cumulative number of Configuration Bridge Protocol Data Units (BPDUs) that have been transmitted out through a PIP (Provider Interface Port) uplink. Configuration BPDUs are control frames used in Spanning Tree Protocol (STP) to maintain a loop-free network topology and communicate bridge priority information. An operator would monitor this counter to verify that the Spanning Tree Protocol is actively functioning on the PIP uplink and to detect if STP configuration frames are being properly transmitted.