350-401 Question 91
Single answerA network engineer is tasked with configuring a virtual switch on a Cisco Nexus 9000 series switch operating in NX-OS mode. They need to ensure that virtualized workloads on a hypervisor can communicate with each other and the physical network. Which feature should the engineer use to create isolated Layer 2 segments for each tenant while still allowing communication through a Layer 3 gateway?
- A
Virtual Port Channel (vPC)
- B
Virtual Device Context (VDC)
- C
VXLAN (Virtual Extensible LAN)
- D
Private VLAN (PVLAN)
Show answer and explanation
Correct answer: C
Explanation
VXLAN is the correct choice because it allows the creation of scalable and isolated Layer 2 segments over a Layer 3 network. This is particularly suitable for virtualized workloads and multi-tenant environments, as described in the scenario. Other options like vPC, VDC, and PVLAN serve different purposes and do not meet the requirements for this specific task.
- A. Incorrect.
Virtual Port Channel (vPC) is used for creating a loop-free topology and enabling multipathing by combining links. It does not provide isolation for virtualized workloads on a hypervisor.
- B. Incorrect.
Virtual Device Context (VDC) is used to virtualize the control plane of a switch, creating separate logical switches. While useful for segmentation, it is not typically used for isolated Layer 2 segments for tenants on a hypervisor.
- C. Correct.
VXLAN (Virtual Extensible LAN) enables the creation of isolated Layer 2 segments over a Layer 3 network. It is specifically designed to support multi-tenant environments and virtualized data centers, making it the correct choice in this scenario.
- D. Incorrect.
Private VLAN (PVLAN) provides isolation at Layer 2 within a single VLAN but does not offer the scalability or functionality of VXLAN for virtualized workloads across multiple hosts or data centers.