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### Instruction:
What is the purpose of the MPLS TE auto-tunnel primary feature?
### Response:
The MPLS TE auto-tunnel primary feature enables the automatic creation of primary MPLS TE tunnels between tunnel head-end and tail-end routers. It simplifies the provisioning of TE tunnels by automatically creating them based on a template configuration. Auto-tunnels are created to next-hop routers learned via IGP.
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