This read-only object is used to display the port state in aggregation
upInBndl(0) - The port is operationally up and actively
takes part in aggregation.
standby(1) - The port is capable of joining in
aggregation group, when any of the ports in
aggregation group goes down.
down(2) - The port is operationally down in lower layers.
or the port is operational in lower layers
but temporarily not able to participate
in aggregation because of different partner
information in the same group.
upIndividual(3) - The port is operating individually and
is not taking part in aggregation.