When using the ifconfig(1M) or ipadm command and you see an error message similar to the sample below, perform the following steps.
... cannot open i40e0; link doesn't exist ...
Use the ipadm(1M) command to plumb the driver. Refer to the ipadm(1M) man page for instructions.
Removing a device and reseating it in another slot does not always clean up the device tree. If this is the case, you must remove the device tree and reboot the server. Refer to Oracle Solaris Administration: Network Interfaces and Network Virtualization for more information.