The value of vRtrMplsTpLspPathLspNumber specifies the MPLS-TP LSP Path
number.
The default value of this object is dependent on the value of
vRtrMplsTpLspPathIndex. If this object refers to a 'working (1)' path,
then the default value is one (1). If this object refers to a
'protecting (2)' path, then the default value is two (2).