The value of vRtrLdpGenLdpFrr specifies whether fast re-route of
LDP tunnel is enabled or disabled.
When the value of vRtrLdpGenLdpFrr is set to 'true' fast re-route
of LDP tunnel is enabled and when vRtrLdpGenLdpFrr is set to
'false' fast re-route of LDP tunnel is disabled.