Which statement about configuring frame MPLS over an ATM PVC is true?

Which statement about configuring frame MPLS over an ATM PVC is true?

Which statement about configuring frame MPLS over an ATM PVC is true?

A.
The VPI/VCI must be manually assigned using a value from the label pool.

B.
The VCI/VPI are assigned dynamically by LDP using a value from the label pool.

C.
The VPI/VCI must be manually assigned using a value supported by the local ATM switch.

D.
The interface automatically learns the VPI/VCI from the local ATM switch and associates it with the defined MPLS.

Explanation:

Label switching Controlled ATM interface (LC-ATM interface) is an interface on a router or an ATM switch in which the VPI/VCI value is assigned through MPLS control products (TDP or LDP).
Reference: MPLS and VPN Architectures (Ciscopress) page 50



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Marco Marzetti

Marco Marzetti

I think the correct answer is C.
In frame-mode MPLS over ATM the administrator configures a given PVC to forward the ethernet frames over the ll5snap sub-layer.
So you configure a single VC that must be accepted by the local switch.