tLagLACPPrimaryPort contains the primary port of the LACP.
The following two conditions have to be met for the port
to become eligible for becoming the primary port:
a) Port has to be in either link up or oper up.
b) The port must have received at least one LACP PDU.
Once the above two conditions have been met, port with a highest
priority is chosen as the primary port.
If there is a tie, the smallest TmnxPortID will be the primary port.