A router RP is configured to perform MPLS LDP graceful restart. Which three steps are included when the RP sends an LDP initialization message to a neighbor to establish an LDP session? (Choose three.)
An RP that is configured to perform LDP NSF includes the Fault Tolerant (FT) Type Length Value (TLV) in the LDP initialization message. The RP sends the LDP initialization message to a neighbor to establish an LDP session.
The FT session TLV includes the following information:
The Learn from Network (L) flag is set to 1, which indicates that the RP is configured to perform LDP Graceful Restart.
The Reconnect Timeout field shows the time (in milliseconds) that the neighbor should wait for a reconnection if the LDP session is lost. This field is set to 120 seconds and cannot be configured.
The Recovery Time field shows the time (in milliseconds) that the neighbor should retain the MPLS forwarding state during a recovery. If a neighbor did not preserve the MPLS forwarding state before the restart of the control plane, the neighbor sets the recovery time to 0.
You can see the "Initialization Message" in this Wireshark Sniff:
https://www.cloudshark.org/captures/60c24d692bfd?filter=frame%20and%20eth%20and%20ip%20and%20tcp%20and%20ldp%20and%20ldp
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