Which of the following configuration steps is NOT required?

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A Carrier Supporting Carrier (CSC) VPRN is configured on an Alcatel-Lucent 7750 SR for a customer carrier who is an Internet Service Provider (ISP).

Which of the following configuration steps is NOT required?
A . Configuring iBGP sessions between PEs residing in different customer carrier sites.
B . Configuring a policy on each CSC-CE to advertise local PE addresses to the network provider.
C . Configuring a CSC VPRN on each CSC-PE with a SAP interface towards the attached CSC-C
E . Configuring an IES service on PEL

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Answer: C