The value of vRtrMplsLspPreference specifies the preference for
the LSP. This value is used for load balancing between multiple
LSPs that exist between the same ingress and egress routers.
By default, traffic is load balanced among the LSPs, since all
LSPs have the same preference. To prefer one LSP over another,
change the preference value for that LSP. The LSP with the
lowest preference is used.