A customer is running a hybrid private cloud implementation that consists of two private clouds: one that is onsite and one that is hosted. Both clouds are currently isolated, but a new business…

A customer is running a hybrid private cloud implementation that consists of two private clouds:

one that is onsite and one that is hosted. Both clouds are currently isolated, but a new business continuity plan requires interconnection of the clouds. A primary concern is the scalability of VLANs and MAC addresses, because interconnection significantly increases the number of VLANs and MACs. Which DCI technology must the customer use to interconnect the clouds over the MPLS backbone of the ISP and ensure that Layer 2 scalability is not compromised?