The value of vRtrLdpIfKeepAliveFactor specifies the value by which
the keepalive timeout (vRtrLdpIfKeepAliveTimeout) should be divided
to give the keepalive time i.e. the time interval, in seconds,
between LDP keepalive messages. LDP keepalive messages are sent to
keep the LDP session from timing out when no other LDP traffic is
being sent between the neighbors.