If your system is not managed by a Hardware Management Console (HMC), and the embedded Ethernet port is disabled, the console-supporting hardware must be located in specific slot locations based on your server model.
For Operations Console (LAN), there might be more than one location that can support a console. When more than one location is available for a server model, the locations are listed from highest priority to lowest priority when the console searches for console-capable hardware resources. By default, the top Host Ethernet Adapter port is used for a local console on a network (LAN).
The console service functions (65+21) and the OPSCONSOLE macro have support to designate a particular adapter.
Also, the external Ethernet adapters are able to run without an IOP. If you do not want to use the Host Ethernet Adapter port, or your system does not have an HEA, you can disable this option. You can also use the OPSCONSOLE macro or the console service functions (65+21) to disable this support. For more information about external Ethernet adapters, see external Ethernet adapters.