networking - Disconnected Network Adapter on VMware - only power cycle solve this

I have a weird issue:

On a VMware 5.1.0 installed on a Dell R620, the network adapter gets disconnected.

Hitting the 'D' button for additional info, shows the following.

• I tried to reset the iDrac - with no results.



• the iDrac shows the network cable connected
  




• Testing the management network fails
  




• I tried the reset Management network - (ofc, not with hopes but I had to try)
  

But the adapter is still disconnected.

• it is connected to an HP switch - resetting the switch didn't change


• Yes, I did replace the cable :-/



• Dell has already replaced one network interface (this is the new one = previous had the same behavior)




• The only thing that works is a full shutdown/power up cycle - of the host - which is ofc not the solution.




• I am not sure what to look for in the system logs.





• Is there a VM patch I need to look for?

-- UPDATE: I have moved my VM's to another vswitch, leaving only the management network on NIC1 (this was after a restart) and everything worked - after some time (can't say exactly) the same thing happned: vmnic0 has become disconnected (with only the management network on it)

Answer

Apparently the issue was with a broken/malfunctioning adapter.

Manufacturer replaced it, and it works.