The value of tmnxOamMfibPingCtlDestAddress specifies the Internet
multicast address to be used as the destination for performing an
OAM ping operation when tmnxOamPingCtlTestMode has a value of
'mfibPing' and the value of tmnxOamMfibPingCtlDestMacAddr is all zeros,
in which case this parameter is required. If tmnxOamPingCtlTestMode is
different from 'mfibPing' this field is ignored.