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### Instruction:
What is the purpose of the MPLS traffic engineering interarea tunnels feature?
### Response:
The MPLS traffic engineering interarea tunnels feature allows MPLS TE tunnels to be established across IGP area boundaries. This enables TE to operate in multi-area environments. Interarea TE tunnels comprise hops in different IGP areas and are signaled as a contiguous end-to-end LSP.
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