The vRtrMplsLspFromAddrType object is an enumerated value that
specifies the source address type of the LSP.
When the value of vRtrMplsLspFromAddrType is 'ipv4', it specifies
an IPv4 address type and vRtrMplsLspFromAddr should be configured.
When the value of vRtrMplsLspFromAddrType is 'nodeId', it specifies
an MPLS-TP node id type and vRtrMplsLspFromNodeId should be
configured.