2V0-41.24 Question 461
Single answerAn administrator is troubleshooting a network connectivity issue in a VMware NSX-T Data Center deployment. Virtual machines on a specific ESXi host are unable to communicate with physical devices in the data center. Upon investigation, the administrator notices that the physical NICs on the ESXi host are up and running but observes dropped packets on the uplinks. Which physical infrastructure issue is most likely causing this problem?
- A
MTU mismatch between the physical switch and the ESXi host
- B
Incorrect VLAN configuration on the physical switch trunk port
- C
Firewall rules blocking traffic from the ESXi host uplinks
- D
Insufficient CPU resources on the ESXi host for the NSX-T VIBs
Show answer and explanation
Correct answer: A
Explanation
The most likely cause of dropped packets on the uplinks in this scenario is an MTU mismatch between the ESXi host and the physical switch. NSX-T often uses jumbo frames to accommodate overlay networks, and if the MTU settings are not consistent across the physical and virtual infrastructure, packet fragmentation or drops may occur. The other options do not directly align with the described symptoms.
- A. Correct.
An MTU mismatch between the physical switch and the ESXi host can result in dropped packets as the frames might be too large to be transmitted properly. This is a common issue in NSX deployments where jumbo frames are used.
- B. Incorrect.
Incorrect VLAN configuration would typically lead to complete loss of traffic for that VLAN but does not explain the observed packet drops while the NICs remain operational.
- C. Incorrect.
Firewall rules blocking traffic would not cause dropped packets on the uplinks but rather prevent specific traffic from reaching its destination.
- D. Incorrect.
Insufficient CPU resources on the ESXi host may impact the performance of the NSX-T VIBs but would not directly cause dropped packets on the physical uplinks.