The value of vRtrLdpGenKeepAliveTimeout specifies the time
interval, in seconds, that LDP waits before tearing down a
session. If no LDP messages are exchanged during this time
interval, the LDP session is torn down. Generally the value of
vRtrLdpGenKeepAliveTimeout is configured to be 3 times the
keepalive time (the time interval between successive LDP
keepalive messages).
This value is only applicable to LDP interfaces and not for
targeted sessions.