The value of vRtrLdpGenTargPassiveMode specifies the mode used
for setting up LDP sessions. When it has a value of 'true', LDP
responds only when it gets a connect request from a peer and will
not attempt to actively connect to its neighbors. When it has a
value of 'false', LDP actively tries to connect to its peers.
This value is only applicable to targeted sessions and not to LDP
interfaces.