The value of tmnxOamLspTrMapDSIPv4Addr indicates the IPv4 address
of the downstream LSR that this entry in the tmnxOamLspTrMapTable
describes. If the interface to the downstream LSR is numbered,
then the tmnxOamLspTrMapDSIPv4Addr can either be the downstream
LSR's Router ID or the interface address of the downstream LSR.
If the interface to the downstream LSR is unnumbered, the value
of tmnxOamLspTrMapDSIPv4Addr indicates the downstream LSR's Router
ID.