Disabling flow control on physical NICs for NSX-T Bare Metal Edges

Products

• VMware NSX

Issue/Introduction

• When using NSX-T Bare Metal Edges, you may need to disable flow control on the physical network interfaces (NICs). Currently, there is no option to manage flow control settings directly through the NSX Manager UI or API.
• This configuration must be performed at the operating system level on the Edge appliance.

Environment

VMware NSX

Cause

Flow control settings on Bare Metal Edges are managed by the underlying Linux operating system and the physical NIC driver, rather than the NSX-T management plane.

Resolution

To disable flow control on a physical interface, perform the following steps:

1. Log in to the Bare Metal Edge command line as a user with administrative privileges.
2. Run the following command to disable flow control for the specific interface:
   • ethtool -A <interface> rx off tx off 
3. Verify that the changes have been applied by running:
   • ethtool -a <interface> 

Note: Settings applied via ethtool are not persistent across reboots. You must re-apply these settings or configure a startup script if the Bare Metal Edge is restarted.

Additional Information

For more information on managing network settings, please refer to the Administration Guide