350-401 Question 115
Single answerAn enterprise network engineer is implementing VXLAN to extend Layer 2 networks across data centers. They need to ensure that the VXLAN traffic is properly encapsulated and routed using the control plane. Which component is crucial for VXLAN control plane operations in this scenario?
- A
VXLAN Tunnel Endpoint (VTEP)
- B
Border Gateway Protocol - Ethernet VPN (BGP-EVPN)
- C
Spanning Tree Protocol (STP)
- D
Generic Routing Encapsulation (GRE)
Show answer and explanation
Correct answer: B
Explanation
BGP-EVPN is the preferred control plane for VXLAN implementations. It allows for the efficient distribution of MAC and IP address information across the network, ensuring proper routing and forwarding of VXLAN traffic. While VTEPs handle the data plane encapsulation and decapsulation for VXLAN, it is BGP-EVPN that manages the control plane operations critical to VXLAN's functionality.
- A. Incorrect.
VXLAN Tunnel Endpoint (VTEP) is responsible for encapsulating and decapsulating VXLAN traffic, but it does not handle the control plane operations required for routing VXLAN traffic.
- B. Correct.
Border Gateway Protocol - Ethernet VPN (BGP-EVPN) is the control plane technology used in VXLAN implementations to distribute Layer 2 and Layer 3 reachability information across the network.
- C. Incorrect.
Spanning Tree Protocol (STP) is used for preventing Layer 2 loops in traditional Ethernet networks, but it is not relevant to the control plane of VXLAN.
- D. Incorrect.
Generic Routing Encapsulation (GRE) is a tunneling protocol used to encapsulate various network layer protocols, but it is not tied to VXLAN's control plane.