Error: Transport node status is Degraded - VMware NSX

Products

• VMware NSX

Issue/Introduction

• A Transport Node host in the NSX UI reports a "Degraded" status.
  
  
• This typically occurs when an underlying component, such as a physical NIC (pNIC), Tunnel, or Management connection, fails a health check.
  
  
• Transport node status shows as Degraded in the NSX Manager UI.
  
  
• Tunnels may show as Up or Down.
  
  
• In System > Fabric > Hosts, clicking the Degraded status reveals a failing component (e.g., Bond/PNIC down).

Environment

• VMware NSX 4.x
  
  
• VMware NSX-T Data Center 3.x

Cause

1. vusb0 Disconnect: A virtual USB adapter (vusb0) is configured but has no physical adapter attached.
   
   
2. Physical Link Failure: One or more physical uplinks (vmnics) have lost link state due to cabling or upstream switch issues.

Resolution

Identify the failing component:

1. In the NSX Manager UI, navigate to System > Fabric > Hosts.
   
   
2. Click the Degraded status link for the affected host to view the specific health check failure.

If the cause is vusb0:

• Remove the vusb adapter from the host in vCenter:
  
  
• Select Host > Configure > Virtual Switches.
  
  
• Remove the vusb0 mapping if it is not required for your environment.

If the cause is a physical vmnic link-down:

• Investigate the physical hardware, cabling, and upstream switchport configuration.
  
  
• Ensure the physical link is restored to an "Up" state in vSphere.

Additional Information

• To speak to a Technical Support Engineer, see KB 206567 - Contact Broadcom support
  
  
• Subscribe to this article to receive updates on fix status: KB 275360 - How to subscribe to a KB article.