This object is used to assign values to vRtrMplsLspIndex as
described in 'Textual Conventions for SNMPv2'. The network
manager reads the object, and then writes the value back
in the SET request that creates a new instance of
vRtrMplsLspEntry. If the SET fails with the code
'inconsistentValue', then the process must be repeated.
If the the SET succeeds, then the object is incremented
and the new instance is created according to the manager's
directions.