When the value of tmnxOamMacPingCtlSendControl is 'true', the OAM
ping packet is sent directly to the destination IP address via the
control plane. If its value is 'false', the packet is sent via the
data plane.
This object is optional and is not relevant when
tmnxOamPingCtlTestMode has a value other than 'macPopulate',
'macPurge' or 'macPing'.