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Question 173 - NCS-Core discussion

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A consultant successfully completes a Foundation using a flat switch. The consultant then works with the customer to move the cluster over to their production network. After the move, the CVMs and hypervisors can no longer communicate, which prevents the cluster from starting.

Which option should be used to resolve this issue?

A.
If the IPMI is in use, check that the IPMI can ping the default gateway over IPv6.
Answers
A.
If the IPMI is in use, check that the IPMI can ping the default gateway over IPv6.
B.
Make sure that the IPMI and CVM VLAN is manually tagged on the Host and CVM.
Answers
B.
Make sure that the IPMI and CVM VLAN is manually tagged on the Host and CVM.
C.
Verify that IPv6 Link Local and DHCP is enabled on all switch ports.
Answers
C.
Verify that IPv6 Link Local and DHCP is enabled on all switch ports.
D.
If using VLANs, confirm the hypervisor/CVM VLAN is set as Native on the switch ports.
Answers
D.
If using VLANs, confirm the hypervisor/CVM VLAN is set as Native on the switch ports.
Suggested answer: D

Explanation:

The inability of CVMs and hypervisors to communicate after moving a cluster to the production network typically points to a VLAN configuration issue. The correct action is to confirm that the VLAN designated for hypervisor/CVM communication is set as the Native VLAN on the switch ports to which the nodes are connected. This setting ensures that traffic from these VLANs is properly prioritized and handled by the network, thereby restoring communication between CVMs and hypervisors and allowing the cluster to start.

Reference: Nutanix Bible, NCS-Core 6.8 official documentation on networking configurations, and troubleshooting VLAN issues.

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asked 23/09/2024
Karabo Manye
33 questions
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