Connectivity Verification (CV) is the function of MPLS-TP. CV finds an association between two MEPs within one MEG or in various MEGs. CV is additionally a proactive OAM activity. It empowers an MEP to report when error packets are received. If a CV-empowered MEP gets a packet from an LSP and examines that packet has been sent in error along an LSP, the MEP will report an alarm showing a sending error.