Unable to enable ENS capability on Cisco VIC

Products

• VMware NSX

Issue/Introduction

• An ENS capable NIC per the Broadcom Compatible Guide reports "ENS Capable" as False. 

# esxcfg-nics -e

• Following log lines seen in ESXi host vmkernel.log:

vmkernel: cpu28:2097822)nenic_ens: enic_attach:1413: vmk_EnsIsDeviceConfigured failed

Environment

VMware NSX

 

Cause

Cisco VIC requires the Geneve_Offloading feature to enable ENS, and the module needs to be enabled first in Cisco UCS

Resolution

1.  Enable Geneve Offloading feature in UCS manager

2.  Ensure the nenic_ens module is enabled on the ESXi host

2.1. check if the module is enabled : # esxcli <conn_options> system module list --module=nenic_ens

2.2. enable the module if not enabled: # esxcli system module set --enabled=true --module=nenic_ens

2.3. reboot the ESXi host.

Additional Information

How to confirm Geneve offload configuration on nenic driver