The Entity Responsible for Maintaining Layer 2 Isolation in VXLAN
Question
Which entity is responsible for maintaining Layer 2 isolation between segments in a VXLAN environment?
Answers
Explanations
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A. B. C. D.A.
In a VXLAN (Virtual Extensible LAN) environment, Layer 2 isolation between segments is maintained by the Virtual Tunnel Endpoint (VTEP).
VXLAN is a network virtualization technology that provides Layer 2 connectivity over an underlying Layer 3 network. VXLAN uses a 24-bit Virtual Network Identifier (VNID) to uniquely identify each virtual network. The VNID is used to isolate Layer 2 traffic between different virtual networks, and it is encapsulated in the VXLAN header.
The VTEP is responsible for encapsulating the Layer 2 traffic with the VXLAN header, and forwarding it over the underlying Layer 3 network. The VTEP receives the traffic from the virtual machines (VMs) or hosts attached to the virtual network, and it uses the VNID to identify the correct VXLAN tunnel. The VTEP then adds the VXLAN header to the Layer 2 frame, and forwards it to the destination VTEP.
The switch fabric is responsible for forwarding the VXLAN traffic between the VTEPs, but it does not maintain Layer 2 isolation. The host switch is responsible for connecting the VMs or hosts to the virtual network, but it does not encapsulate the Layer 2 traffic with the VXLAN header.
Therefore, the correct answer to the question is C. VTEP.
