An engineer implemented LDP protocol on the ISP network. The engineer must ensure that there are no packet loss issues when IGP and LDP protocols are not synchronized. Which configuring must the engin

Disabling IP CEF would drastically impair forwarding performance and is counterproductive, as LDP relies on CEF for proper operation and efficient packet switching.

Configuring MPLS LDP IGP synchronization ensures that an IGP interface's metric or cost is advertised only after LDP has successfully established its adjacencies and exchanged labels over that interface. This prevents traffic from being routed over a path by IGP before LDP is ready to forward MPLS packets, thereby avoiding packet loss.

LDP session protection maintains LDP sessions over interface flaps or temporary outages but does not address the initial synchronization of IGP routes with LDP label distribution during convergence.

Disabling MPLS LDP IGP synchronization would remove the very mechanism designed to prevent packet loss due to IGP-LDP desynchronization, worsening the issue.