The value of vRtrLdpGenShortTTLPropLocal specifies whether or not
to enable the propagation of time to live (TTL) from the header of
IP packet into the header of resulting MPLS packet for all local
packets forwarded over a LDP shortcut. When the value is set to
'true' TTL is propagated from the header of IP packet into the
header of the resulting MPLS packet for all local packets.