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Question 183 - NCS-Core discussion

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A consultant finishes creating a new ESXi cluster. The consultant connects to the nodes via laptop and a personal flat switch. The host/CVM network is on VLAN 23. The customer has the native VLAN on the ToR switches set to 23.

The customer wants to use LACP. Before placing the nodes on the customer network, the consultant tags VLAN 23 for each host and CVM. The consultant connects the nodes to the customer network and finds that they are unreachable.

What is causing this issue?

A.
The customer has LACP fallback enabled on switch ports.
Answers
A.
The customer has LACP fallback enabled on switch ports.
B.
The hosts have not been migrated to a vSphere Distributed Switch.
Answers
B.
The hosts have not been migrated to a vSphere Distributed Switch.
C.
Under the vSwitch0 settings, the consultant did not select Route based on IP hash.
Answers
C.
Under the vSwitch0 settings, the consultant did not select Route based on IP hash.
D.
The host and CVM are incorrectly configured.
Answers
D.
The host and CVM are incorrectly configured.
Suggested answer: C

Explanation:

In this scenario, the connectivity issue arises because the VLAN settings require a specific configuration on the vSwitch settings when using LACP. When using LACP for load balancing network traffic, the vSwitch or Distributed Switch must be configured with the 'Route based on IP hash' load balancing algorithm. This setting is necessary to properly distribute the traffic across the LACP bonded links. Not selecting this setting in vSwitch0 settings would result in improper handling of network packets over the LACP bonded links, thereby causing the hosts and CVMs to be unreachable. Adjusting the vSwitch settings to 'Route based on IP hash' should resolve the connectivity issue.

Reference: VMware vSphere Networking documentation, Nutanix Bible LACP configuration guidelines.

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asked 23/09/2024
Tanner Blair
31 questions
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