The value of vRtrMplsP2mpInstHopLimit specifies the maximum number
of hops that a P2MP LSP will traverse including the ingress and
egress ESRs. A P2MP LSP will not be setup if the hop limit is
exceeded.
When the vRtrMplsP2mpInstHopLimit bit in vRtrMplsP2mpInstInheritance
is cleared (0), the value returned to a GET request is inherited
from vRtrMplsLspHopLimit.