Assume that a VXLAN tunnel is monitored on a Huawei CE series switch and that the tunnel status is Down or the tunnel fails to be dynamically established. In this scenario, which of the following statements are true about how to check the cause of the fault? (Select All that Apply)

All listed statements describe valid methods for troubleshooting a faulty VXLAN tunnel on a Huawei CE series switch. The official troubleshooting procedure includes checking peer status, reviewing specific troubleshooting logs, and examining packet statistics.
- display vxlan peer (B) is used to check the status of remote VTEPs.
- display vxlan troubleshooting (C, D) is a dedicated command that records and displays the reasons for the last five tunnel establishment failures and the last five instances of a tunnel going Down.
- display vxlan statistics (A) is used to check packet counters. Observing statistics, such as transmitted packets without any received packets, is a key step in diagnosing the fault's nature, like a one-way reachability problem in the underlay.

As all options represent valid and documented troubleshooting steps or command functions for diagnosing VXLAN tunnel faults on Huawei CE switches, there are no incorrect options.

Huawei CloudEngine 8800, 7800, 6800, 5800 Series Switches. (2024). Command Reference - VXLAN Commands. This reference details the functions of display vxlan peer, display vxlan statistics, and display vxlan troubleshooting, confirming their roles in fault diagnosis.

Huawei CloudEngine Series Switches. (2023). VXLAN Configuration Guide - Troubleshooting VXLAN. This guide outlines the fault diagnosis procedure, which includes using the display vxlan peer, display vxlan troubleshooting, and display vxlan statistics commands as integral steps to locate the cause of a fault.