Verify the i5/OS side
You must have a line description in the NWSD for a VE port to be installed. Use the instructions found here,Configure virtual Ethernet networks, to create a line description.
When a VE port problem persists after you successfully create a line description and reboot the integrated server, come back to this troubleshooting section and follow the instructions for the newly matched failing case.
Verify the Windows side
When no i5/OS line description is present, a VE port should not be listed under Windows. Install the line description as described in Configure virtual Ethernet networks and restart the integrated server to see if this fixes the problem.