jnxMIMstCistPortOperVersion 1.3.6.1.4.1.2636.3.46.1.1.6.1.41

This indicates whether the Port is operationally in the Mstp mode, Rstp mode or the Stp-compatible mode i.e., whether the Port is transmitting MST BPDUs, RST BPDUs or Config/TCN BPDUs.