If the VMWare version is 4.x (no longer supported by VMWare),
The e1000 Adapter may be changed to VMXNet3 using the following steps:
- Shut the STM-VA Host down.
- Right-click the STM-VA host in the vSphere4.x UI > Properties.
- Navigate to Options > General
- Change the Guest OS to: Linux and use the drop-down and select RHEL x 64 or Ubuntu x 64.
- Remove the existing e1000 adapter(s) if necessary.
- Select Hardware > Add > Ethernet Adapters
- Use the drop-down menu to select VMXnet3
Using VMWare version 5.x:
- Shut the vADC host down
- Right-click the vADC host and click Edit Settings
- Select the Hardware tab
- Select the e1000 Adapter and click Remove
- Click Add
- From the list, choose Ethernet Adapter
- Click Next
- For Adapter Type, select VMXnet3
It can be problematic to have different Ethernet adapter types and this may lead to networking problems such as the VA adapter flip-flopping the startup from eth0 to eth1 and vice-versa. Brocade recommends using the VMXnet3 adapter for stability and performance within ESX and in conjunction with VMWare's Best Practice
For more information, please see https://kb.vmware.com/s/article/1001805