Link Status of vmnicX shows Down on ESXi

Products

• VMware vSphere ESXi

Issue/Introduction

This article describes what Link Status of vmnicX means. 

Resolution

 

To check the status from the command line via SSH, run the following command:

esxcli network nic list or esxcfg-nics -l

Sample output:

Name     PCI Device    Driver  Admin Status  Link Status   Speed  Duplex  MAC Address         MTU  Description
-------  ------------  ------  ------------  -----------  ------  ------  -----------------  ----  -----------
vmnic0   0000:01:00.0  ixgben  Up            Up             1000  Full    ##:##:##:##:##:##  1500  Intel(R) Ethernet Controller X540-AT2
vmnic1   0000:01:00.1  ixgben  Up            Down              0  Half    ##:##:##:##:##:##  1500  Intel(R) Ethernet Controller X540-AT2

Note: The Link Status column specifies the status of the link between the physical network adapter and the physical switch.

If the "Link Status" shows as Down, then contact the host hardware vendor for troubleshooting.
For more information on troubleshooting link Down issues refer - Network adapter (vmnic) is down or fails with a Failed Criteria Code

Additional Information

japaneseKB:ESXi で vmnicX のリンク ステータスが Down と表示される