A consultant creates an AHV cluster and connects the Intel X550T NICs to the top of rack switch using Twinax cables. The activity and link lights are green. The cluster cannot communicate over the 10GbE link. What is the first command the consultant should perform to troubleshoot the issue?

When troubleshooting a network connectivity issue on an AHV host where physical link lights are active but no data is passing, the first step is to verify how the host's operating system perceives the network interfaces. The manageovs showinterfaces command provides a detailed status of all physical network interfaces on the AHV host, including their detected link speed, duplex settings, and MTU. This command will immediately confirm if the 10GbE link speed is correctly negotiated or if there is a mismatch, which is a common cause for such issues despite link lights being on.

A. manageovs showbridges: This shows the bridge configuration, which is the next logical step after verifying the physical interfaces are working correctly.
C. manageovs updateuplinks: This is a command to modify the configuration, not to view the current state for troubleshooting.
D. manageovs showuplinks: This shows how uplinks are bonded in a bridge. It is useful, but checking the fundamental status of the individual interfaces first is more direct.

1. Nutanix AHV Administration Guide, Section: "Host Network Management". This guide documents the manageovs utility and its options. It specifies that showinterfaces is used to "display the status of all network interfaces on the host".

2. Nutanix Knowledge Base, Article KB-3025, "AHV | Network Troubleshooting and Information Gathering". This article lists manageovs --showinterfaces as a primary command for checking the physical interface status, speed, and duplex.

3. Nutanix University, Nutanix Advanced Networking course, Module: "AHV Networking Troubleshooting". This module teaches a troubleshooting methodology that begins with verifying the physical layer and data link layer using commands like manageovs showinterfaces.