An entry in this table represents one incoming
segment. An entry can be created by a network
administrator or an SNMP agent, or an MPLS signaling
protocol. The creator of the entry is denoted by
mplsInSegmentOwner. An entry in this table is
indexed by the ifIndex of the incoming interface and
the (top) label. The value of mplsInSegmentRowStatus
cannot be active(1)unless the ifTable entry
corresponding to mplsInSegmentIfIndex exists.