tmnxPtpPeerLastRxPortEncapType 1.3.6.1.4.1.6527.3.1.2.74.2.3.1.19

The value of tmnxPtpPeerLastRxPortEncapType along with tmnxPtpPeerLastRxPortId and tmnxPtpPeerLastRxPortEncapValue indicates the last port used to receive PTP packets from the PTP peer.