The value of tmnxMDASynchronousEthernet specifies whether or not
the MDA maintains synchronous Ethernet (syncE) communication on all
of its ports.
not-applicable - The MDA does not support synchronous Ethernet.
enabled - The MDA is in synchronous mode.
disabled - The MDA is in asynchronous mode (default).
On MDAs that do not support synchronous ethernet the only supported
value is 'not-applicable (0)'.
If tmnxMDASynchronousEthernet is 'enabled (1)' then any port on the
MDA can be used as a source port in the tmnxSyncIfTimingTable.