Thanks, that made me think and talk to our network guy.
This is how the port was configured and no network access:
interface GigabitEthernet0/12
switchport access vlan 250
speed 1000
spanning-tree portfast
Then we changed it too this and now it works:
interface GigabitEthernet0/12
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 250
switchport mode trunk
Does the port need to be trunked to work for Vmware ?