Correcting a failed Shared Ethernet Adapter configuration

You can troubleshoot errors that occur when you configure a Shared Ethernet Adapter, such as those that result in message 0514-040, by using the lsdev, netstat, and entstat commands.

When you configure a Shared Ethernet Adapter the configuration can fail with the following error:

Method error (/usr/lib/methods/cfgsea):
        0514-040 Error initializing a device into the kernel.

To correct the problem, complete the following steps:

Verify that the physical and virtual adapters that are being used to create the shared Ethernet adapter are available by running the following command:
```
lsdev -type adapter
```
Make sure that the interface of neither the physical nor any of the virtual adapters are configured. Run the following command:
```
netstat -state
```
Important: None of the interfaces of the adapters must be listed in the output. If any interface name (for example, en0) does is listed in the output, detach it as follows:
```
chdev -dev interface_name -attr state=detach
```
You might want to perform this step from a console connection because it is possible that detaching this interface will end your network connection to the Virtual I/O Server.
Verify that the virtual adapters that are used for data are trunk adapters by running the following command:
```
entstat -all entX | grep Trunk
```
Note:
- The trunk adapter does not apply to the virtual adapter that is used as the control channel in a Shared Ethernet Adapter Failover configuration.
- If any of the virtual adapters that are used for data are not trunk adapters, you need to enable them to access external networks from the HMC.
Verify that the physical device and the virtual adapters in the Shared Ethernet Adapter are in agreement on the checksum offload setting:
1. Determine the checksum offload setting on physical device by running the following command:
```
lsdev -dev device_name -attr chksum_offload
```
  where device_name is the name of the physical device. For example, ent0.
2. If chksum_offload is set to yes, enable checksum offload for all of the virtual adapters in the Shared Ethernet Adapter by running the following command:
```
chdev -dev device_name -attr chksum_offload=yes
```
  Where device_name is the name of a virtual adapter in the Shared Ethernet Adapter. For example, ent2.
3. If chksum_offload is set to no, disable checksum offload for all of the virtual adapters in the Shared Ethernet Adapter by running the following command:
```
chdev -dev device_name -attr chksum_offload=no
```
  where device_name is the name of a virtual adapter in the Shared Ethernet Adapter.
4. If there is no output, the physical device does not support checksum offload and therefore does not have the attribute. To resolve the error, disable checksum offload for all of the virtual adapters in the Shared Ethernet Adapter by running the following command:
```
chdev -dev device_name -attr chksum_offload=no
```
  where device_name is the name of a virtual adapter in the Shared Ethernet Adapter.
If the real adapter is a Host Ethernet Adapter port, also known as, a Logical Integrated Virtual Ethernet adapter port, make sure that the Virtual I/O Server has been configured as the promiscuous logical partition for the physical port of the logical Integrated Virtual Ethernet adapter from the HMC.