300-420 Question 189
Single answerAn enterprise network engineer is tasked with designing a Layer 2 VPN solution to interconnect two remote data center sites over a service provider's MPLS network. The solution must ensure that traffic between the two sites appears as if it is on the same Layer 2 segment and supports features like VLAN tagging. Which technology would best meet these requirements?
- A
MPLS L2VPN (Martini)
- B
MPLS L3VPN
- C
DMVPN
- D
EVPN-VXLAN
Show answer and explanation
Correct answer: A
Explanation
The MPLS L2VPN (Martini) solution is the best fit for this scenario as it enables Layer 2 connectivity between remote sites over an MPLS network, meeting the requirement of maintaining the appearance of a single Layer 2 segment. It supports features like VLAN tagging and ensures seamless Layer 2 communication between the sites.
- A. Correct.
MPLS L2VPN (Martini) provides a point-to-point Layer 2 VPN service, allowing Ethernet frames to be carried transparently across the service provider's MPLS network. It supports VLAN tagging and is ideal for the requirement.
- B. Incorrect.
MPLS L3VPN is a Layer 3 VPN solution that provides IP routing between sites but does not maintain Layer 2 connectivity, making it unsuitable for this scenario.
- C. Incorrect.
DMVPN is a Layer 3 overlay technology primarily used for scalable, dynamic IPsec VPNs. It doesn't provide the Layer 2 connectivity required in this case.
- D. Incorrect.
EVPN-VXLAN is generally used for modern data center overlay solutions but is not specifically optimized for point-to-point Layer 2 VPNs over an MPLS network.