2V0-41.24 Question 78
Single answerAn administrator is troubleshooting a connectivity issue in a VMware NSX-T environment. A virtual machine (VM) on a logical switch is unable to communicate with another VM on a different logical switch. Both logical switches are connected to a Tier-1 Gateway. The administrator wants to check the packet forwarding behavior. Which step should the administrator take to identify the issue?
- A
Verify that both logical switches are part of the same Transport Zone.
- B
Check if the ARP table entries for the destination VM are present in the source VM's guest operating system.
- C
Ensure that the Tier-1 Gateway is connected to an Edge Node for North-South traffic.
- D
Confirm that the Segment Ports of the logical switches are connected to the Tier-1 Gateway.
Show answer and explanation
Correct answer: D
Explanation
For VMs on different logical switches to communicate, the logical switches must be connected to the same Tier-1 Gateway via their Segment Ports. This allows the Tier-1 Gateway to handle packet forwarding between the switches. Verifying this connection is critical to resolving inter-switch communication issues in NSX-T.
- A. Incorrect.
Logical switches must be part of the same Transport Zone to enable communication, but this only applies to VMs on the same logical switch or during East-West communication. For inter-switch communication, the Tier-1 Gateway connection must also be verified.
- B. Incorrect.
Checking the ARP table is useful for diagnosing communication issues within the same logical switch but does not directly address inter-switch communication issues via the Tier-1 Gateway.
- C. Incorrect.
The Edge Node connection to the Tier-1 Gateway only impacts North-South traffic (external to the NSX-T environment). This scenario involves East-West traffic, which does not require an Edge Node.
- D. Correct.
Segment Ports of the logical switches must be connected to the Tier-1 Gateway for inter-switch communication. If the logical switches are not connected, traffic cannot be forwarded between them.