The vRtrMplsLspToAddrType object is an enumerated value that specifies
the destination address type of the LSP.
The value of 'ipv4' specifies an IPv4 address and vRtrMplsLspToAddr
should be configured.
The value of 'nodeId' specifies an MPLS-TP node id and
vRtrMplsLspToNodeId should be configured.