hwDot1agCfmMepIfIndex 1.3.6.1.4.1.2011.5.25.136.1.1.5.1.1.3

This object indicates the interface to which the MEP is bound. The interface is either a bridge port, or an aggregated IEEE 802.1 link within a bridge port, to which the MEP is attached. By default, the value of IfIndex is 0.