Deltav Workstation Primary Bad

Anyone have experienced with DeltaV workstation's network card got bad status even though the actual network components are working well

such as Lan cable, network switch etc. After restarting it will work for 10 min and again it will become bad. if we ping the system from other system it will result in Request time out and it is able to ping other systems from the same system which is showing primary bad.we went through the KBA 1600-0058 and still showing primary bad.We are using dell T5800 workstation.