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### Instruction:
What is the purpose of the MPLS traffic engineering auto-tunnel primary feature?
### Response:
The MPLS traffic engineering auto-tunnel primary feature allows point-to-point MPLS TE primary tunnels to be created dynamically between tunnel head-end and tail-end routers. It reduces configuration compared to manually configuring TE tunnels. It is enabled with the mpls traffic-eng auto-tunnel primary command.
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