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Question 195 - NCS-Core discussion

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A consultant creates a Nutanix cluster using the 10.10.10.0/24 network and VLAN 10. The customer creates a VM network inside the Prism using VLAN 20. The customer starts to create VMs but is unable to ping the default gateway from these new systems.

What is causing the issue?

A.
The CVM/hypervisor must be on an untagged VLAN.
Answers
A.
The CVM/hypervisor must be on an untagged VLAN.
B.
The switch port is not set up as a trunk.
Answers
B.
The switch port is not set up as a trunk.
C.
Only one VLAN is supported on AHV.
Answers
C.
Only one VLAN is supported on AHV.
D.
The CVM/hypervisor cannot use the same VLAN as guest VMs.
Answers
D.
The CVM/hypervisor cannot use the same VLAN as guest VMs.
Suggested answer: B

Explanation:

The issue of VMs not being able to ping the default gateway from a newly created VM network on VLAN 20, while the Nutanix cluster uses VLAN 10, most likely stems from the switch port configuration. For the VMs on VLAN 20 to communicate outside their local network, the switch port to which the Nutanix nodes are connected must be configured as a trunk. This configuration allows multiple VLANs to coexist on the same physical port and enables routing between them. Without the trunk setup, the VLAN 20 traffic is restricted and cannot reach the network beyond the switch, including the default gateway.

Reference: Nutanix Network Configuration Guide, Best Practices for VLAN Configurations.SZXCDESX

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asked 23/09/2024
Alex Fill
30 questions
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