The state of IGMP pruning operation on this port.
The value enabled(1) indicates that IGMP pruning
is enabled on this port, in all VLANs, as long as
confIgmpPruEnabled is also enabled for this device.
When disabled(2) but confIgmpPruEnabled is still
enabled for the device, IGMP pruning is disabled
on this port in all VLANs.