What need I check when LSP flapping occurs

When LSP flapping occurs, check the following information:
Whether the peer end can be pinged. Run the display mpls ldp peer command in the system view to check the peer address (Transport-Address field). Run the ping command to check for traffic loss.
Whether route flapping occurs. Run the display ip routing-table command in the system view to check all the current routing information. Set the destination address to check all the current routing information mapping the destination address. Frequently check routing information in a period to check for flapping.
Whether LDP session flapping occurs. Run the display mpls ldp session command in the system view to check information about all LDP sessions. Set the peer address to check information about the LDP session with the specified peer. Frequently check LDP session information in a period to check for flapping.
Whether lsp-trigger all is configured.
Whether exceptions occur by enabling the debugging function.

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