LDP IGP Synchronization

LDP synchronization with the IGP allows you to configure the time LDP waits before informing the interior gateway protocol (IGP) that the LDP neighbor and session for an interface are operational. For large networks with numerous forwarding equivalence classes (FECs), you might need to configure this timer to a higher value to allow enough time for the LDP label databases to be exchanged and programmed on the forwarding plane.