tmnxOamEthCfmPingCtlTable contains Ethernet CFM-specific configuration
information for 'ethCfmLoopback', 'ethCfmTwoWayDelay', and
'ethCfmTwoWaySlm' tests.
This table extends the tmnxOamPingCtlTable. A row is automatically
created in this table when a row is created in tmnxOamPingCtlTable with
tmnxOamPingCtlTestMode set to 'ethCfmLoopback', 'ethCfmTwoWayDelay', or
'ethCfmTwoWaySlm'. Deleting a row in tmnxOamPingCtlTable automatically
deletes the row (if any) with the same index values in
tmnxOamEthCfmPingCtlTable.
Test results are stored in tmnxOamPingResultsTable and
tmnxOamPingHistoryTable.