The value of vRtrLdpGenHelloFactor specifies the value by
which the hello timeout (vRtrLdpGenHelloTimeout) should be
divided to give the hello time i.e. the time interval, in seconds,
between LDP Hello messages. LDP uses hello messages to discover
neighbors and to detect loss of connectivity with its neighbors.
This value is only applicable to LDP interfaces and not for
targeted sessions.