This attribute indicates the IMA remote defect indicator (RDI)
currently being received on this link. Possible values are:
noDefect: no defect.
physicalLayerDefect: the interface used by the remote link has a
physical layer defect. This value can occur only if the protocol for
the IMA group is atmForum10.
interfaceDown: the physical interface used by the remote link is
down.This value can occur only if the protocol for the IMA group is
proprietary.
lif: the remote link has a loss of IMA frame (LIF) defect.
lods: the remote link has a loss of delay synchronization (LODS)
defect; that is, it has exhibited a differential delay which is greater
than the maximum differential delay tolerated by the IMA group.